./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbe9305dfa705c6adeb45241a85cbda41a40d96daaf057706b199b2a64bbcd77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:14:02,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:14:02,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:14:02,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:14:02,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:14:02,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:14:02,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:14:02,959 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:14:02,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:14:02,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:14:02,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:14:02,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:14:02,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:14:02,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:14:02,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:14:02,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:14:02,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:14:02,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:14:02,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:14:02,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:14:02,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:14:02,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:14:02,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:14:03,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:14:03,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:14:03,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:14:03,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:14:03,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:14:03,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:14:03,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:14:03,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:14:03,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:14:03,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:14:03,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:14:03,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:14:03,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:14:03,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:14:03,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:14:03,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:14:03,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:14:03,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:14:03,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:14:03,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:14:03,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:14:03,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:14:03,057 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:14:03,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:14:03,058 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:14:03,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:14:03,058 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:14:03,058 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:14:03,059 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:14:03,059 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:14:03,059 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:14:03,059 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:14:03,060 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:14:03,060 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:14:03,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:14:03,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:14:03,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:14:03,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:14:03,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:14:03,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:14:03,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:14:03,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:14:03,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:14:03,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:14:03,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:14:03,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:14:03,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:14:03,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:14:03,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:14:03,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:14:03,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:14:03,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:14:03,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:14:03,065 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:14:03,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:14:03,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:14:03,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:14:03,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:14:03,067 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbe9305dfa705c6adeb45241a85cbda41a40d96daaf057706b199b2a64bbcd77 [2021-11-03 05:14:03,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:14:03,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:14:03,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:14:03,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:14:03,382 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:14:03,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/drift_tenth.c [2021-11-03 05:14:03,465 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/c18bd01ca/137ab8fa73834687a2d15d4909ec1e4f/FLAGaa97dc880 [2021-11-03 05:14:04,004 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:14:04,005 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c [2021-11-03 05:14:04,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/c18bd01ca/137ab8fa73834687a2d15d4909ec1e4f/FLAGaa97dc880 [2021-11-03 05:14:04,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/c18bd01ca/137ab8fa73834687a2d15d4909ec1e4f [2021-11-03 05:14:04,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:14:04,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:14:04,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:14:04,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:14:04,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:14:04,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71591222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04, skipping insertion in model container [2021-11-03 05:14:04,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:14:04,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:14:04,638 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c[348,361] [2021-11-03 05:14:04,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:14:04,659 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:14:04,671 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c[348,361] [2021-11-03 05:14:04,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:14:04,687 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:14:04,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04 WrapperNode [2021-11-03 05:14:04,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:14:04,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:14:04,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:14:04,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:14:04,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:14:04,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:14:04,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:14:04,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:14:04,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:14:04,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:14:04,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:14:04,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:14:04,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (1/1) ... [2021-11-03 05:14:04,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:14:04,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:04,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:14:04,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:14:04,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:14:04,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:14:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:14:04,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:14:05,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:14:05,185 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:14:05,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:14:05 BoogieIcfgContainer [2021-11-03 05:14:05,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:14:05,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:14:05,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:14:05,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:14:05,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:14:04" (1/3) ... [2021-11-03 05:14:05,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c941051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:14:05, skipping insertion in model container [2021-11-03 05:14:05,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:04" (2/3) ... [2021-11-03 05:14:05,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c941051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:14:05, skipping insertion in model container [2021-11-03 05:14:05,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:14:05" (3/3) ... [2021-11-03 05:14:05,196 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c [2021-11-03 05:14:05,201 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:14:05,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:14:05,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:14:05,252 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:14:05,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:14:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-03 05:14:05,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:05,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-03 05:14:05,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1912039, now seen corresponding path program 1 times [2021-11-03 05:14:05,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:14:05,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144630956] [2021-11-03 05:14:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:05,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:14:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:05,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:14:05,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144630956] [2021-11-03 05:14:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144630956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:05,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:14:05,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:14:05,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667411448] [2021-11-03 05:14:05,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:14:05,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:14:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:14:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:14:05,493 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:05,511 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-03 05:14:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:14:05,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-03 05:14:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:05,519 INFO L225 Difference]: With dead ends: 13 [2021-11-03 05:14:05,520 INFO L226 Difference]: Without dead ends: 6 [2021-11-03 05:14:05,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:14:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-03 05:14:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-03 05:14:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-03 05:14:05,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-03 05:14:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:05,550 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-03 05:14:05,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-03 05:14:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:14:05,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:05,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:14:05,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:14:05,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 59200132, now seen corresponding path program 1 times [2021-11-03 05:14:05,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:14:05,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295058238] [2021-11-03 05:14:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:05,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:14:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:05,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:14:05,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295058238] [2021-11-03 05:14:05,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295058238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:14:05,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046343630] [2021-11-03 05:14:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:05,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:05,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:14:05,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:14:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:14:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:05,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046343630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:05,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641340934] [2021-11-03 05:14:05,849 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 05:14:05,850 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:14:05,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:14:05,863 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:14:05,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:14:05,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:05,923 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:14:05,925 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:05,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:14:05,930 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:14:05,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:05,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:14:05,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 05:14:05,969 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-03 05:14:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:14:06,014 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:14:06,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:14:06,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:14:06,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 05:14:06,135 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,138 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:14:06,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:14:06,140 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:14:06,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,166 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 05:14:06,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:14:06,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 05:14:06,183 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-11-03 05:14:06,202 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-03 05:14:06,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:06,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 05:14:06,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:06,469 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-11-03 05:14:06,472 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 05:14:06,479 INFO L180 QuantifierPusher]: treesize reduction 34, result has 58.0 percent of original size [2021-11-03 05:14:06,483 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 05:14:06,490 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:14:06,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:14:06,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:14:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-03 05:14:06,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990904049] [2021-11-03 05:14:06,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:14:06,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:14:06,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:14:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:14:06,665 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:06,684 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-03 05:14:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:14:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:14:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:06,685 INFO L225 Difference]: With dead ends: 12 [2021-11-03 05:14:06,686 INFO L226 Difference]: Without dead ends: 9 [2021-11-03 05:14:06,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:14:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-03 05:14:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-03 05:14:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-03 05:14:06,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-03 05:14:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:06,691 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-03 05:14:06,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:06,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-03 05:14:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:14:06,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:06,694 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-03 05:14:06,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:06,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:06,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1672991705, now seen corresponding path program 2 times [2021-11-03 05:14:06,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:14:06,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038189492] [2021-11-03 05:14:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:06,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:14:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:06,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:14:06,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038189492] [2021-11-03 05:14:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038189492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:14:06,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712437132] [2021-11-03 05:14:06,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:14:06,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:07,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:14:07,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:14:07,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-03 05:14:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:14:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:14:07,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:07,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:07,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712437132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:07,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426933963] [2021-11-03 05:14:07,253 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-03 05:14:07,253 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:14:07,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:14:07,253 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:14:07,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:14:07,266 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,268 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:14:07,268 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:14:07,270 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:14:07,270 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,270 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:14:07,272 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-03 05:14:07,290 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-03 05:14:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:14:07,302 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,303 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:14:07,303 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,304 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:14:07,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:14:07,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:14:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 05:14:07,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:14:07,360 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,361 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:14:07,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:14:07,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,376 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-03 05:14:07,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:14:07,377 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-03 05:14:07,394 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.2 percent of original size [2021-11-03 05:14:07,398 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-11-03 05:14:07,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,472 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:14:07,484 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 242 [2021-11-03 05:14:07,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:14:07,543 INFO L180 QuantifierPusher]: treesize reduction 30, result has 57.1 percent of original size [2021-11-03 05:14:07,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-11-03 05:14:07,551 INFO L180 QuantifierPusher]: treesize reduction 34, result has 58.0 percent of original size [2021-11-03 05:14:07,554 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 05:14:07,557 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:14:07,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:14:07,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:14:07,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-03 05:14:07,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767883993] [2021-11-03 05:14:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 05:14:07,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:14:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 05:14:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:14:07,714 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:07,738 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-03 05:14:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:14:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:14:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:07,740 INFO L225 Difference]: With dead ends: 18 [2021-11-03 05:14:07,740 INFO L226 Difference]: Without dead ends: 15 [2021-11-03 05:14:07,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:14:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-03 05:14:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-03 05:14:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-03 05:14:07,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-03 05:14:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-03 05:14:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-03 05:14:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 05:14:07,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:07,746 INFO L513 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-03 05:14:07,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:07,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-03 05:14:07,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1912037625, now seen corresponding path program 3 times [2021-11-03 05:14:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:14:07,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110555956] [2021-11-03 05:14:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:07,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:14:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:14:07,987 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:14:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:14:08,019 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:14:08,019 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:14:08,020 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:14:08,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-03 05:14:08,029 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-03 05:14:08,032 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:14:08,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:14:08 BoogieIcfgContainer [2021-11-03 05:14:08,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:14:08,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:14:08,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:14:08,058 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:14:08,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:14:05" (3/4) ... [2021-11-03 05:14:08,061 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 05:14:08,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:14:08,062 INFO L168 Benchmark]: Toolchain (without parser) took 3682.96 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 66.7 MB in the beginning and 58.0 MB in the end (delta: 8.8 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:08,063 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory was 55.9 MB in the beginning and 55.8 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:14:08,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.44 ms. Allocated memory is still 98.6 MB. Free memory was 66.5 MB in the beginning and 76.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:08,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.58 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 74.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:08,064 INFO L168 Benchmark]: Boogie Preprocessor took 19.94 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 73.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:14:08,065 INFO L168 Benchmark]: RCFGBuilder took 447.11 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 63.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:08,067 INFO L168 Benchmark]: TraceAbstraction took 2867.77 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 63.0 MB in the beginning and 58.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-11-03 05:14:08,069 INFO L168 Benchmark]: Witness Printer took 4.12 ms. Allocated memory is still 123.7 MB. Free memory was 58.9 MB in the beginning and 58.0 MB in the end (delta: 886.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:14:08,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory was 55.9 MB in the beginning and 55.8 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.44 ms. Allocated memory is still 98.6 MB. Free memory was 66.5 MB in the beginning and 76.2 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.58 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 74.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.94 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 73.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 447.11 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 63.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2867.77 ms. Allocated memory was 98.6 MB in the beginning and 123.7 MB in the end (delta: 25.2 MB). Free memory was 63.0 MB in the beginning and 58.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.12 ms. Allocated memory is still 123.7 MB. Free memory was 58.9 MB in the beginning and 58.0 MB in the end (delta: 886.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * 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: 6]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 15. Possible FailurePath: [L10] float tick = 1.f / 10.f; [L11] float time = 0.f; [L12] int i; [L14] i = 0 [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ [L14] COND FALSE !(i < 10) [L6] COND TRUE !(cond) [L6] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 16 SDs, 0 SdLazy, 26 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 [2021-11-03 05:14:08,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/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_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbe9305dfa705c6adeb45241a85cbda41a40d96daaf057706b199b2a64bbcd77 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:14:10,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:14:10,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:14:10,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:14:10,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:14:10,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:14:10,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:14:10,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:14:10,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:14:10,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:14:10,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:14:10,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:14:10,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:14:10,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:14:10,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:14:10,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:14:10,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:14:10,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:14:10,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:14:10,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:14:10,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:14:10,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:14:10,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:14:10,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:14:10,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:14:10,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:14:10,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:14:10,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:14:10,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:14:10,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:14:10,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:14:10,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:14:10,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:14:10,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:14:10,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:14:10,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:14:10,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:14:10,588 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:14:10,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:14:10,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:14:10,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:14:10,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:14:10,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:14:10,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:14:10,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:14:10,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:14:10,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:14:10,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:14:10,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:14:10,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:14:10,623 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:14:10,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:14:10,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:14:10,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:14:10,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:14:10,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:14:10,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:14:10,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:14:10,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:14:10,626 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:14:10,626 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:14:10,626 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:14:10,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:14:10,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:14:10,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:14:10,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:14:10,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:14:10,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:14:10,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:14:10,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:14:10,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:14:10,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:14:10,629 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:14:10,629 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:10,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:14:10,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:14:10,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:14:10,630 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbe9305dfa705c6adeb45241a85cbda41a40d96daaf057706b199b2a64bbcd77 [2021-11-03 05:14:11,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:14:11,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:14:11,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:14:11,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:14:11,035 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:14:11,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/drift_tenth.c [2021-11-03 05:14:11,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/e5363a94e/3792b8aca4904e89ae2f4f6c340fc905/FLAGb5e4509b7 [2021-11-03 05:14:11,583 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:14:11,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c [2021-11-03 05:14:11,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/e5363a94e/3792b8aca4904e89ae2f4f6c340fc905/FLAGb5e4509b7 [2021-11-03 05:14:11,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/data/e5363a94e/3792b8aca4904e89ae2f4f6c340fc905 [2021-11-03 05:14:11,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:14:11,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:14:11,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:14:11,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:14:11,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:14:11,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:14:11" (1/1) ... [2021-11-03 05:14:11,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1253b88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:11, skipping insertion in model container [2021-11-03 05:14:11,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:14:11" (1/1) ... [2021-11-03 05:14:11,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:14:11,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:14:12,122 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c[348,361] [2021-11-03 05:14:12,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:14:12,165 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:14:12,183 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_3a6732b7-aff0-4365-8ac3-3e93d7580915/sv-benchmarks/c/float-benchs/drift_tenth.c[348,361] [2021-11-03 05:14:12,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:14:12,209 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:14:12,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12 WrapperNode [2021-11-03 05:14:12,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:14:12,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:14:12,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:14:12,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:14:12,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:14:12,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:14:12,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:14:12,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:14:12,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:14:12,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:14:12,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:14:12,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:14:12,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (1/1) ... [2021-11-03 05:14:12,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:14:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:12,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:14:12,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:14:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:14:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:14:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:14:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:14:12,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:14:12,752 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:14:12,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:14:12 BoogieIcfgContainer [2021-11-03 05:14:12,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:14:12,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:14:12,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:14:12,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:14:12,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:14:11" (1/3) ... [2021-11-03 05:14:12,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77356f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:14:12, skipping insertion in model container [2021-11-03 05:14:12,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:14:12" (2/3) ... [2021-11-03 05:14:12,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77356f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:14:12, skipping insertion in model container [2021-11-03 05:14:12,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:14:12" (3/3) ... [2021-11-03 05:14:12,763 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c [2021-11-03 05:14:12,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:14:12,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:14:12,868 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:14:12,878 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:14:12,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:14:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:14:12,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:12,911 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:14:12,912 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-11-03 05:14:12,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:12,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1617018693] [2021-11-03 05:14:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:12,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:12,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:12,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:14:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:13,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:14:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:13,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:13,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:13,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1617018693] [2021-11-03 05:14:13,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1617018693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:14:13,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:14:13,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:14:13,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830557144] [2021-11-03 05:14:13,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:14:13,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:14:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:14:13,163 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:13,287 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-03 05:14:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:14:13,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:14:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:13,298 INFO L225 Difference]: With dead ends: 23 [2021-11-03 05:14:13,298 INFO L226 Difference]: Without dead ends: 11 [2021-11-03 05:14:13,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:14:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-03 05:14:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-03 05:14:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-03 05:14:13,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2021-11-03 05:14:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:13,329 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-03 05:14:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-03 05:14:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 05:14:13,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:13,330 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:13,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:14:13,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:14:13,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 1 times [2021-11-03 05:14:13,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:13,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508120546] [2021-11-03 05:14:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:13,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:13,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:13,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:14:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:14:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:13,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:13,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:14:13,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508120546] [2021-11-03 05:14:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508120546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1206410723] [2021-11-03 05:14:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:13,891 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:14:13,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:14:13,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-03 05:14:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:14:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1206410723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:14,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052227128] [2021-11-03 05:14:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:14:14,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:14:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:14:14,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:14:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:14:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:14:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:14:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:14:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052227128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:14:14,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:14:14,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 05:14:14,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774045083] [2021-11-03 05:14:14,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:14:14,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:14:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:14:14,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:14:14,492 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:14:14,961 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-03 05:14:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:14:14,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-03 05:14:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:14:14,965 INFO L225 Difference]: With dead ends: 23 [2021-11-03 05:14:14,965 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 05:14:14,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:14:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 05:14:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-03 05:14:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-03 05:14:14,971 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-11-03 05:14:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:14:14,971 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-03 05:14:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:14:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-03 05:14:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:14:14,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:14:14,972 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-03 05:14:14,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:15,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:14:15,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-03 05:14:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:14:15,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:14:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:14:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 2 times [2021-11-03 05:14:15,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:14:15,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79122854] [2021-11-03 05:14:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:14:15,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:14:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:14:15,588 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:14:15,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:14:15,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:14:15,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:14:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:14:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:14:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:14:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:15:32,594 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-03 05:16:20,378 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-03 05:16:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 16 times theorem prover too weak. 0 trivial. 16 not checked. [2021-11-03 05:16:22,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:16:22,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79122854] [2021-11-03 05:16:22,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79122854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:16:22,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952405465] [2021-11-03 05:16:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:16:22,138 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:16:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:16:22,140 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:16:22,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 05:16:22,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:16:22,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:16:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:16:22,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:16:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:16:30,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:17:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 16 times theorem prover too weak. 0 trivial. 16 not checked. [2021-11-03 05:17:01,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952405465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:17:01,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283608014] [2021-11-03 05:17:01,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:17:01,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:17:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:17:01,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:17:01,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 05:17:01,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:17:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:17:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:17:01,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:17:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:17:35,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:15,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283608014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:18:15,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:18:15,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 33 [2021-11-03 05:18:15,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844696696] [2021-11-03 05:18:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 05:18:15,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 05:18:15,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=756, Unknown=37, NotChecked=118, Total=1056 [2021-11-03 05:18:15,007 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:25,195 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~tick~0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0))) (= c_ULTIMATE.start_main_~i~0 (_ bv0 32)) (= c_ULTIMATE.start_main_~time~0 (_ +zero 8 24)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-03 05:18:27,218 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~tick~0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0))) (= c_ULTIMATE.start_main_~i~0 (_ bv0 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_ULTIMATE.start_main_~time~0 (fp.add c_currentRoundingMode (_ +zero 8 24) c_ULTIMATE.start_main_~tick~0))) is different from true [2021-11-03 05:18:29,243 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~tick~0 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0))) (= c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0) c_ULTIMATE.start_main_~tick~0)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven) (= c_ULTIMATE.start_main_~time~0 (fp.add c_currentRoundingMode (_ +zero 8 24) c_ULTIMATE.start_main_~tick~0))) is different from true [2021-11-03 05:18:53,358 WARN L207 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-11-03 05:19:04,259 WARN L207 SmtUtils]: Spent 7.82 s on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-11-03 05:19:20,418 WARN L207 SmtUtils]: Spent 10.82 s on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-11-03 05:19:32,807 WARN L207 SmtUtils]: Spent 7.52 s on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-11-03 05:19:52,471 WARN L207 SmtUtils]: Spent 10.49 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-11-03 05:20:06,010 WARN L207 SmtUtils]: Spent 7.90 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-11-03 05:20:09,019 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse4 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0))) (let ((.cse5 (fp.add c_currentRoundingMode .cse4 c_ULTIMATE.start_main_~tick~0))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) .cse1)) (= c_ULTIMATE.start_main_~time~0 (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0)))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (_ +zero 8 24) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2))) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (= c_ULTIMATE.start_main_~i~0 (_ bv5 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse4) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse5) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from false [2021-11-03 05:20:11,057 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse4 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0))) (let ((.cse5 (fp.add c_currentRoundingMode .cse4 c_ULTIMATE.start_main_~tick~0))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) .cse1)) (= c_ULTIMATE.start_main_~time~0 (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0)))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (_ +zero 8 24) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2))) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (= c_ULTIMATE.start_main_~i~0 (_ bv5 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse4) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse5) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-03 05:20:13,097 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse4 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0))) (let ((.cse5 (fp.add c_currentRoundingMode .cse4 c_ULTIMATE.start_main_~tick~0))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) .cse1)) (= c_ULTIMATE.start_main_~time~0 (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0)))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (_ +zero 8 24) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2))) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse4) .cse1)) (= (_ bv6 32) c_ULTIMATE.start_main_~i~0) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse5) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from false [2021-11-03 05:20:15,183 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse4 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0))) (let ((.cse5 (fp.add c_currentRoundingMode .cse4 c_ULTIMATE.start_main_~tick~0))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) .cse1)) (= c_ULTIMATE.start_main_~time~0 (let ((.cse2 (fp.div c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) ((_ to_fp 8 24) c_currentRoundingMode 10.0)))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (_ +zero 8 24) .cse2) .cse2) .cse2) .cse2) .cse2) .cse2))) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse4) .cse1)) (= (_ bv6 32) c_ULTIMATE.start_main_~i~0) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse5) .cse1)) (= c_currentRoundingMode roundNearestTiesToEven)))))) is different from true [2021-11-03 05:20:18,447 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse3 (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse2 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_main_~tick~0)) .cse1)) (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (_ bv10 32)) (bvslt (bvadd (_ bv3 32) c_ULTIMATE.start_main_~i~0) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~time~0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse2) .cse1)) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) (_ bv10 32)))))) is different from true [2021-11-03 05:20:20,485 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse3 (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse2 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (bvslt c_ULTIMATE.start_main_~i~0 (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_main_~tick~0)) .cse1)) (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~time~0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse2) .cse1)) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) (_ bv10 32)))))) is different from false [2021-11-03 05:20:22,518 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse3 (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse2 (fp.add c_currentRoundingMode .cse3 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (bvslt c_ULTIMATE.start_main_~i~0 (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_main_~tick~0)) .cse1)) (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~time~0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse2) .cse1)) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) (_ bv10 32)))))) is different from true [2021-11-03 05:20:24,549 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~time~0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse2) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_main_~tick~0)) .cse1)) (bvslt (bvadd (_ bv2 32) c_ULTIMATE.start_main_~i~0) (_ bv10 32))))) is different from false [2021-11-03 05:20:30,188 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode c_ULTIMATE.start_main_~time~0 c_ULTIMATE.start_main_~tick~0))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~tick~0)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (bvslt c_ULTIMATE.start_main_~i~0 (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (bvslt (bvadd c_ULTIMATE.start_main_~i~0 (_ bv1 32)) (_ bv10 32)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode c_ULTIMATE.start_main_~time~0) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse2) .cse1)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 c_ULTIMATE.start_main_~tick~0)) .cse1))))) is different from true [2021-11-03 05:21:11,072 WARN L207 SmtUtils]: Spent 12.97 s on a formula simplification that was a NOOP. DAG size: 22 [2021-11-03 05:21:56,855 WARN L207 SmtUtils]: Spent 11.39 s on a formula simplification that was a NOOP. DAG size: 20 [2021-11-03 05:24:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:33,480 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-03 05:24:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-03 05:24:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 05:24:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:33,482 INFO L225 Difference]: With dead ends: 39 [2021-11-03 05:24:33,482 INFO L226 Difference]: Without dead ends: 31 [2021-11-03 05:24:33,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 440.1s TimeCoverageRelationStatistics Valid=385, Invalid=1660, Unknown=69, NotChecked=1078, Total=3192 [2021-11-03 05:24:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-03 05:24:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-03 05:24:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-03 05:24:33,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2021-11-03 05:24:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:33,492 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-03 05:24:33,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-03 05:24:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:24:33,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:33,494 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-11-03 05:24:33,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:33,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:33,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-03 05:24:34,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:34,118 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:24:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 3 times [2021-11-03 05:24:34,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:34,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042989956] [2021-11-03 05:24:34,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:24:34,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:34,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:34,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:34,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:24:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-03 05:24:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:24:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:24:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:24:35,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:24:36,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:36,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042989956] [2021-11-03 05:24:36,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042989956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:36,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [352358658] [2021-11-03 05:24:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:24:36,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:24:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:24:36,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:24:36,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 05:24:37,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-03 05:24:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:24:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:24:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:24:37,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:24:38,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [352358658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:38,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573094039] [2021-11-03 05:24:38,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:24:38,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:24:38,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:24:38,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:24:38,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 05:24:41,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-03 05:24:41,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:24:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:24:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:24:41,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:24:44,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573094039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:24:44,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:24:44,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 16] total 38 [2021-11-03 05:24:44,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353342977] [2021-11-03 05:24:44,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-03 05:24:44,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-03 05:24:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 05:24:44,587 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:46,305 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-11-03 05:24:46,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:24:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-03 05:24:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:46,307 INFO L225 Difference]: With dead ends: 31 [2021-11-03 05:24:46,307 INFO L226 Difference]: Without dead ends: 0 [2021-11-03 05:24:46,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=358, Invalid=1048, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 05:24:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-03 05:24:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-03 05:24:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-03 05:24:46,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-11-03 05:24:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:46,310 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-03 05:24:46,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-03 05:24:46,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-03 05:24:46,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:24:46,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:46,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-03 05:24:46,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:46,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a6732b7-aff0-4365-8ac3-3e93d7580915/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:24:46,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-03 05:24:46,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:24:46,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:24:46,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms