./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8027421f69536d6ab05b283a89e3cb3b4d544d6c464b60eed1661be7de5f3901 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:41,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:41,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:41,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:41,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:41,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:41,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:41,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:41,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:41,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:41,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:41,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:41,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:41,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:41,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:41,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:41,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:41,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:42,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:42,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:42,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:42,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:42,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:42,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:42,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:42,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:42,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:42,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:42,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:42,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:42,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:42,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:42,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:42,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:42,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:42,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:42,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:42,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:42,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:42,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:42,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:42,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:32:42,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:42,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:42,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:42,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:42,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:42,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:42,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:42,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:32:42,110 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:42,111 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:42,112 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:32:42,112 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:32:42,112 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:42,113 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:32:42,113 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:32:42,113 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:32:42,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:42,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:42,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:32:42,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:42,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:42,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:42,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:42,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:42,116 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:42,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:42,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:42,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:42,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:42,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:42,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:42,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:42,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:42,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:42,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:42,119 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:32:42,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:32:42,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:42,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:42,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:42,120 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_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8027421f69536d6ab05b283a89e3cb3b4d544d6c464b60eed1661be7de5f3901 [2021-11-13 02:32:42,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:42,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:42,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:42,507 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:42,508 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:42,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:42,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/55afa094b/bcd964511f2a42c687e7bc9f7663416b/FLAGaf10e3df5 [2021-11-13 02:32:43,307 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:43,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:43,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/55afa094b/bcd964511f2a42c687e7bc9f7663416b/FLAGaf10e3df5 [2021-11-13 02:32:43,574 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/55afa094b/bcd964511f2a42c687e7bc9f7663416b [2021-11-13 02:32:43,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:43,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:43,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:43,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:43,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:43,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:43" (1/1) ... [2021-11-13 02:32:43,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c824abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:43, skipping insertion in model container [2021-11-13 02:32:43,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:43" (1/1) ... [2021-11-13 02:32:43,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:43,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:43,892 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[1997,2010] [2021-11-13 02:32:43,898 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[2366,2379] [2021-11-13 02:32:43,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:43,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:43,977 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[1997,2010] [2021-11-13 02:32:43,979 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[2366,2379] [2021-11-13 02:32:44,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:44,033 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:44,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44 WrapperNode [2021-11-13 02:32:44,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:44,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:44,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:44,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:44,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:44,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:44,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:44,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:44,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:44,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:44,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:44,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:44,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (1/1) ... [2021-11-13 02:32:44,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:44,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:44,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:44,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-13 02:32:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-13 02:32:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:32:44,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:44,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:44,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:32:44,305 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:32:44,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:44,998 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:32:45,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:45 BoogieIcfgContainer [2021-11-13 02:32:45,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:45,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:45,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:45,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:45,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:43" (1/3) ... [2021-11-13 02:32:45,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca90c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:45, skipping insertion in model container [2021-11-13 02:32:45,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:44" (2/3) ... [2021-11-13 02:32:45,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ca90c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:45, skipping insertion in model container [2021-11-13 02:32:45,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:45" (3/3) ... [2021-11-13 02:32:45,018 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:45,025 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:45,026 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:32:45,107 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:45,120 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 [2021-11-13 02:32:45,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:32:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 43 states have internal predecessors, (60), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 02:32:45,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-13 02:32:45,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:45,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-13 02:32:45,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 9697065, now seen corresponding path program 1 times [2021-11-13 02:32:45,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:45,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822468252] [2021-11-13 02:32:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:45,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:32:45,312 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 02:32:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:32:45,355 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-13 02:32:45,357 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 02:32:45,359 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 02:32:45,362 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 02:32:45,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:32:45,368 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-13 02:32:45,371 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:32:45,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 02:32:45 BoogieIcfgContainer [2021-11-13 02:32:45,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 02:32:45,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 02:32:45,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 02:32:45,397 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 02:32:45,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:45" (3/4) ... [2021-11-13 02:32:45,402 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 02:32:45,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 02:32:45,404 INFO L158 Benchmark]: Toolchain (without parser) took 1825.52ms. Allocated memory is still 125.8MB. Free memory was 88.4MB in the beginning and 56.3MB in the end (delta: 32.1MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,405 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 125.8MB. Free memory was 99.2MB in the beginning and 99.1MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:32:45,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 450.67ms. Allocated memory is still 125.8MB. Free memory was 88.1MB in the beginning and 96.3MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,407 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.56ms. Allocated memory is still 125.8MB. Free memory was 96.1MB in the beginning and 94.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,408 INFO L158 Benchmark]: Boogie Preprocessor took 74.20ms. Allocated memory is still 125.8MB. Free memory was 94.0MB in the beginning and 92.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,409 INFO L158 Benchmark]: RCFGBuilder took 812.73ms. Allocated memory is still 125.8MB. Free memory was 92.1MB in the beginning and 70.3MB in the end (delta: 21.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,410 INFO L158 Benchmark]: TraceAbstraction took 388.29ms. Allocated memory is still 125.8MB. Free memory was 69.7MB in the beginning and 56.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 02:32:45,410 INFO L158 Benchmark]: Witness Printer took 5.74ms. Allocated memory is still 125.8MB. Free memory was 56.5MB in the beginning and 56.3MB in the end (delta: 228.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:32:45,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 125.8MB. Free memory was 99.2MB in the beginning and 99.1MB in the end (delta: 28.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 450.67ms. Allocated memory is still 125.8MB. Free memory was 88.1MB in the beginning and 96.3MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.56ms. Allocated memory is still 125.8MB. Free memory was 96.1MB in the beginning and 94.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.20ms. Allocated memory is still 125.8MB. Free memory was 94.0MB in the beginning and 92.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 812.73ms. Allocated memory is still 125.8MB. Free memory was 92.1MB in the beginning and 70.3MB in the end (delta: 21.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 388.29ms. Allocated memory is still 125.8MB. Free memory was 69.7MB in the beginning and 56.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 5.74ms. Allocated memory is still 125.8MB. Free memory was 56.5MB in the beginning and 56.3MB in the end (delta: 228.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L402] COND TRUE __VERIFIER_nondet_int() [L403] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.399f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 [2021-11-13 02:32:45,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8027421f69536d6ab05b283a89e3cb3b4d544d6c464b60eed1661be7de5f3901 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:48,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:48,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:48,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:48,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:48,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:48,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:48,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:48,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:48,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:48,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:48,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:48,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:48,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:48,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:48,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:48,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:48,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:48,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:48,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:48,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:48,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:48,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:48,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:48,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:48,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:48,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:48,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:48,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:48,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:48,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:48,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:48,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:48,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:48,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:48,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:48,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:48,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:48,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:48,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:48,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:48,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:32:48,652 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:48,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:48,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:48,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:48,655 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:48,655 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:48,655 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:48,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:48,656 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:48,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:48,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:48,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:32:48,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:32:48,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:48,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:48,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:48,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:48,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:32:48,661 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:32:48,662 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:32:48,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:32:48,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:48,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:48,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:48,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:48,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:32:48,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:48,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:48,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:48,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:48,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:48,665 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:32:48,666 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:32:48,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:48,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:48,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:48,667 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_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8027421f69536d6ab05b283a89e3cb3b4d544d6c464b60eed1661be7de5f3901 [2021-11-13 02:32:49,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:49,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:49,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:49,161 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:49,162 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:49,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:49,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/39ba86c01/e3107d5eca614ef281b5458b2c8a2d31/FLAG1140ba003 [2021-11-13 02:32:49,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:49,885 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:49,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/39ba86c01/e3107d5eca614ef281b5458b2c8a2d31/FLAG1140ba003 [2021-11-13 02:32:50,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/data/39ba86c01/e3107d5eca614ef281b5458b2c8a2d31 [2021-11-13 02:32:50,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:50,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:50,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:50,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:50,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:50,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659c2f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50, skipping insertion in model container [2021-11-13 02:32:50,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:50,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:50,471 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[1997,2010] [2021-11-13 02:32:50,481 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[2366,2379] [2021-11-13 02:32:50,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:50,630 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:50,655 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[1997,2010] [2021-11-13 02:32:50,657 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_297cdccc-495a-4398-945f-bcd1d614748b/sv-benchmarks/c/combinations/square_6+soft_float_1-3a.c.cil.c[2366,2379] [2021-11-13 02:32:50,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:50,765 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:50,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50 WrapperNode [2021-11-13 02:32:50,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:50,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:50,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:50,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:50,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:50,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:50,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:50,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:50,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:50,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:50,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:50,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:50,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (1/1) ... [2021-11-13 02:32:50,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:50,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:50,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:32:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:32:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-13 02:32:51,043 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-13 02:32:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:51,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:51,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 02:32:51,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 02:32:53,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:53,843 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:32:53,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:53 BoogieIcfgContainer [2021-11-13 02:32:53,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:53,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:53,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:53,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:53,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:50" (1/3) ... [2021-11-13 02:32:53,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2851226e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:53, skipping insertion in model container [2021-11-13 02:32:53,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:50" (2/3) ... [2021-11-13 02:32:53,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2851226e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:53, skipping insertion in model container [2021-11-13 02:32:53,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:53" (3/3) ... [2021-11-13 02:32:53,856 INFO L111 eAbstractionObserver]: Analyzing ICFG square_6+soft_float_1-3a.c.cil.c [2021-11-13 02:32:53,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:53,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:32:53,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:53,932 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 [2021-11-13 02:32:53,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:32:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 02:32:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:32:53,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:53,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:53,967 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-13 02:32:53,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:53,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329221798] [2021-11-13 02:32:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:54,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:54,008 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:54,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:32:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:32:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:54,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:32:54,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329221798] [2021-11-13 02:32:54,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329221798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:54,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:54,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:32:54,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784499824] [2021-11-13 02:32:54,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:54,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:32:54,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:32:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:32:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:32:54,928 INFO L87 Difference]: Start difference. First operand has 81 states, 67 states have (on average 1.5820895522388059) internal successors, (106), 71 states have internal predecessors, (106), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-13 02:32:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:54,998 INFO L93 Difference]: Finished difference Result 157 states and 249 transitions. [2021-11-13 02:32:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:32:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-13 02:32:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:55,016 INFO L225 Difference]: With dead ends: 157 [2021-11-13 02:32:55,016 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 02:32:55,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:32:55,043 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:55,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:32:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 02:32:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-13 02:32:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 64 states have internal predecessors, (91), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:32:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2021-11-13 02:32:55,113 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 7 [2021-11-13 02:32:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:55,114 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2021-11-13 02:32:55,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-13 02:32:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2021-11-13 02:32:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:32:55,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:55,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:55,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:55,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:32:55,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:32:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-13 02:32:55,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:32:55,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749151924] [2021-11-13 02:32:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:55,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:32:55,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:32:55,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:32:55,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:40:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:40:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:58,602 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-13 02:41:49,099 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-13 02:41:51,151 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.geq .cse0 (_ +zero 8 24))) (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1399.0 1000.0)))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-13 02:41:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:41:51,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:01,900 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from false [2021-11-13 02:42:03,975 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from true [2021-11-13 02:42:18,859 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from false [2021-11-13 02:42:20,936 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from true [2021-11-13 02:43:05,540 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) is different from false [2021-11-13 02:43:07,620 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) is different from true [2021-11-13 02:43:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:43:50,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:43:50,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749151924] [2021-11-13 02:43:50,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749151924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:43:50,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:43:50,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-13 02:43:50,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463451018] [2021-11-13 02:43:50,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:43:50,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 02:43:50,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:43:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 02:43:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=9, NotChecked=60, Total=110 [2021-11-13 02:43:50,215 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-11-13 02:43:52,305 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-13 02:43:54,383 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.geq .cse1 (_ +zero 8 24)) (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0)))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-13 02:43:56,474 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from false [2021-11-13 02:43:58,557 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from true [2021-11-13 02:44:00,629 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-11-13 02:44:02,706 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-13 02:44:04,788 WARN L838 $PredicateComparison]: unable to prove that (and (fp.geq |c_ULTIMATE.start_main1_~result~0#1| (_ +zero 8 24)) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (fp.lt |c_ULTIMATE.start_main1_~result~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 1399.0 1000.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-13 02:44:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:04,832 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2021-11-13 02:44:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:04,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) Word has length 7 [2021-11-13 02:44:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:04,835 INFO L225 Difference]: With dead ends: 74 [2021-11-13 02:44:04,835 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 02:44:04,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=29, Invalid=21, Unknown=16, NotChecked=144, Total=210 [2021-11-13 02:44:04,838 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 0 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 32.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:04,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 401 Invalid, 412 Unknown, 0 Unchecked, 7.14ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 409 Unchecked, 32.70ms Time] [2021-11-13 02:44:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 02:44:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-13 02:44:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 59 states have internal predecessors, (86), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 02:44:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 103 transitions. [2021-11-13 02:44:04,860 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 103 transitions. Word has length 7 [2021-11-13 02:44:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:04,861 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 103 transitions. [2021-11-13 02:44:04,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 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) [2021-11-13 02:44:04,861 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 103 transitions. [2021-11-13 02:44:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 02:44:04,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:04,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:04,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:05,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:05,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:05,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1413922597, now seen corresponding path program 1 times [2021-11-13 02:44:05,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:05,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859381040] [2021-11-13 02:44:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:05,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:05,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:44:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:05,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:44:05,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:05,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:05,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859381040] [2021-11-13 02:44:05,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859381040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:05,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77658775] [2021-11-13 02:44:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:05,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:44:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:44:05,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:44:05,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-13 02:44:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:44:06,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:06,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:06,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77658775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:06,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856868416] [2021-11-13 02:44:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:06,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:44:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:44:06,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:44:06,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:44:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:44:06,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:07,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:07,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856868416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:44:07,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:44:07,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2021-11-13 02:44:07,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806968322] [2021-11-13 02:44:07,472 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:44:07,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:44:07,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:44:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:44:07,475 INFO L87 Difference]: Start difference. First operand 69 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:44:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:10,048 INFO L93 Difference]: Finished difference Result 325 states and 523 transitions. [2021-11-13 02:44:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:44:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-11-13 02:44:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:10,064 INFO L225 Difference]: With dead ends: 325 [2021-11-13 02:44:10,064 INFO L226 Difference]: Without dead ends: 280 [2021-11-13 02:44:10,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:44:10,067 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 286 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1613.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.55ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1746.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:10,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 1441 Invalid, 376 Unknown, 0 Unchecked, 19.55ms Time], IncrementalHoareTripleChecker [40 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1746.32ms Time] [2021-11-13 02:44:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-13 02:44:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 113. [2021-11-13 02:44:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.425531914893617) internal successors, (134), 95 states have internal predecessors, (134), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (21), 17 states have call predecessors, (21), 14 states have call successors, (21) [2021-11-13 02:44:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 170 transitions. [2021-11-13 02:44:10,102 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 170 transitions. Word has length 33 [2021-11-13 02:44:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 170 transitions. [2021-11-13 02:44:10,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 02:44:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 170 transitions. [2021-11-13 02:44:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 02:44:10,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:10,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:10,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:10,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-13 02:44:10,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:10,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:44:10,722 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash -458870352, now seen corresponding path program 1 times [2021-11-13 02:44:10,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:10,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900663216] [2021-11-13 02:44:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:10,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:10,725 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:10,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:44:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:44:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:11,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:11,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900663216] [2021-11-13 02:44:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900663216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:11,485 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:11,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 02:44:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429840120] [2021-11-13 02:44:11,486 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:11,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:11,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:11,488 INFO L87 Difference]: Start difference. First operand 113 states and 170 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:11,910 INFO L93 Difference]: Finished difference Result 249 states and 377 transitions. [2021-11-13 02:44:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:11,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-13 02:44:11,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:11,914 INFO L225 Difference]: With dead ends: 249 [2021-11-13 02:44:11,914 INFO L226 Difference]: Without dead ends: 188 [2021-11-13 02:44:11,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:11,917 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 52 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 331.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.11ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:11,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 465 Invalid, 71 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 353.11ms Time] [2021-11-13 02:44:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-13 02:44:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-11-13 02:44:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 158 states have (on average 1.4177215189873418) internal successors, (224), 157 states have internal predecessors, (224), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (28), 28 states have call predecessors, (28), 21 states have call successors, (28) [2021-11-13 02:44:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 274 transitions. [2021-11-13 02:44:11,945 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 274 transitions. Word has length 41 [2021-11-13 02:44:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:11,946 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 274 transitions. [2021-11-13 02:44:11,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 274 transitions. [2021-11-13 02:44:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 02:44:11,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:11,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:11,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:12,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:12,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 221188018, now seen corresponding path program 1 times [2021-11-13 02:44:12,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:12,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082223922] [2021-11-13 02:44:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:12,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:12,171 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:12,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:44:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:44:12,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:13,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:13,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082223922] [2021-11-13 02:44:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082223922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:13,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:13,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-13 02:44:13,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980791939] [2021-11-13 02:44:13,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:13,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 02:44:13,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 02:44:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:13,079 INFO L87 Difference]: Start difference. First operand 184 states and 274 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:13,693 INFO L93 Difference]: Finished difference Result 257 states and 384 transitions. [2021-11-13 02:44:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:44:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-13 02:44:13,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:13,697 INFO L225 Difference]: With dead ends: 257 [2021-11-13 02:44:13,698 INFO L226 Difference]: Without dead ends: 202 [2021-11-13 02:44:13,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:44:13,703 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 444.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.31ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 473.52ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:13,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 548 Invalid, 92 Unknown, 0 Unchecked, 4.31ms Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 473.52ms Time] [2021-11-13 02:44:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-13 02:44:13,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2021-11-13 02:44:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 152 states have (on average 1.394736842105263) internal successors, (212), 151 states have internal predecessors, (212), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (25), 25 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-13 02:44:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 256 transitions. [2021-11-13 02:44:13,763 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 256 transitions. Word has length 41 [2021-11-13 02:44:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:13,763 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 256 transitions. [2021-11-13 02:44:13,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:13,764 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 256 transitions. [2021-11-13 02:44:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 02:44:13,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:13,768 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:13,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:13,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:13,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash 64679693, now seen corresponding path program 1 times [2021-11-13 02:44:13,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:13,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901097625] [2021-11-13 02:44:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:13,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:13,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:13,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:44:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:14,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:14,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:14,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901097625] [2021-11-13 02:44:14,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901097625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:14,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:14,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:44:14,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580328944] [2021-11-13 02:44:14,642 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:14,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:14,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:14,644 INFO L87 Difference]: Start difference. First operand 175 states and 256 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:14,863 INFO L93 Difference]: Finished difference Result 349 states and 518 transitions. [2021-11-13 02:44:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-13 02:44:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:14,868 INFO L225 Difference]: With dead ends: 349 [2021-11-13 02:44:14,868 INFO L226 Difference]: Without dead ends: 283 [2021-11-13 02:44:14,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:14,870 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 112 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:14,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 488 Invalid, 43 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [15 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 164.70ms Time] [2021-11-13 02:44:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-13 02:44:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-11-13 02:44:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 208 states have (on average 1.3317307692307692) internal successors, (277), 205 states have internal predecessors, (277), 21 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (27), 27 states have call predecessors, (27), 20 states have call successors, (27) [2021-11-13 02:44:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 325 transitions. [2021-11-13 02:44:14,899 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 325 transitions. Word has length 44 [2021-11-13 02:44:14,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:14,900 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 325 transitions. [2021-11-13 02:44:14,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 325 transitions. [2021-11-13 02:44:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:44:14,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:14,904 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:14,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:15,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:15,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:15,118 INFO L85 PathProgramCache]: Analyzing trace with hash -610339590, now seen corresponding path program 1 times [2021-11-13 02:44:15,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:15,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927012955] [2021-11-13 02:44:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:15,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:15,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:15,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:15,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:44:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:15,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 02:44:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:44:16,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:16,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:16,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927012955] [2021-11-13 02:44:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927012955] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:44:16,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:44:16,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-13 02:44:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199072470] [2021-11-13 02:44:16,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:16,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:16,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:44:16,677 INFO L87 Difference]: Start difference. First operand 233 states and 325 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:18,471 INFO L93 Difference]: Finished difference Result 405 states and 588 transitions. [2021-11-13 02:44:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:44:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-13 02:44:18,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:18,477 INFO L225 Difference]: With dead ends: 405 [2021-11-13 02:44:18,477 INFO L226 Difference]: Without dead ends: 369 [2021-11-13 02:44:18,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:44:18,479 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 192 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1282.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.42ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1403.30ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:18,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 513 Invalid, 245 Unknown, 0 Unchecked, 5.42ms Time], IncrementalHoareTripleChecker [18 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1403.30ms Time] [2021-11-13 02:44:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-13 02:44:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 286. [2021-11-13 02:44:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 253 states have (on average 1.3201581027667983) internal successors, (334), 251 states have internal predecessors, (334), 29 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-13 02:44:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 398 transitions. [2021-11-13 02:44:18,511 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 398 transitions. Word has length 45 [2021-11-13 02:44:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:18,512 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 398 transitions. [2021-11-13 02:44:18,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 398 transitions. [2021-11-13 02:44:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:44:18,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:18,516 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:18,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:18,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:18,732 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1164667772, now seen corresponding path program 1 times [2021-11-13 02:44:18,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:18,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736385846] [2021-11-13 02:44:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:18,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:18,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:18,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:44:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:44:18,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:19,219 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:19,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736385846] [2021-11-13 02:44:19,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736385846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:19,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:19,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:44:19,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40389332] [2021-11-13 02:44:19,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:44:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:44:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:44:19,221 INFO L87 Difference]: Start difference. First operand 286 states and 398 transitions. Second operand has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:19,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:19,418 INFO L93 Difference]: Finished difference Result 293 states and 404 transitions. [2021-11-13 02:44:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-13 02:44:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:19,423 INFO L225 Difference]: With dead ends: 293 [2021-11-13 02:44:19,423 INFO L226 Difference]: Without dead ends: 286 [2021-11-13 02:44:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:44:19,424 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 6 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:19,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 589 Invalid, 28 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 134.34ms Time] [2021-11-13 02:44:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-13 02:44:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-13 02:44:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 253 states have (on average 1.308300395256917) internal successors, (331), 251 states have internal predecessors, (331), 29 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-13 02:44:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 395 transitions. [2021-11-13 02:44:19,447 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 395 transitions. Word has length 45 [2021-11-13 02:44:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:19,448 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 395 transitions. [2021-11-13 02:44:19,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 395 transitions. [2021-11-13 02:44:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 02:44:19,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:19,451 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:19,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:19,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:19,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -617643621, now seen corresponding path program 2 times [2021-11-13 02:44:19,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:19,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125294050] [2021-11-13 02:44:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:44:19,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:19,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:19,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:44:19,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 02:44:19,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:44:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:44:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:44:20,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:44:20,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:20,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125294050] [2021-11-13 02:44:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125294050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:20,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-13 02:44:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176736404] [2021-11-13 02:44:20,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:20,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:44:20,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:44:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:44:20,679 INFO L87 Difference]: Start difference. First operand 286 states and 395 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:21,271 INFO L93 Difference]: Finished difference Result 384 states and 539 transitions. [2021-11-13 02:44:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:44:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-13 02:44:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:21,277 INFO L225 Difference]: With dead ends: 384 [2021-11-13 02:44:21,278 INFO L226 Difference]: Without dead ends: 382 [2021-11-13 02:44:21,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:44:21,281 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 89 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 282.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:21,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 821 Invalid, 65 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 16 Unchecked, 282.50ms Time] [2021-11-13 02:44:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-13 02:44:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 290. [2021-11-13 02:44:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 256 states have (on average 1.3046875) internal successors, (334), 254 states have internal predecessors, (334), 29 states have call successors, (29), 3 states have call predecessors, (29), 4 states have return successors, (35), 35 states have call predecessors, (35), 28 states have call successors, (35) [2021-11-13 02:44:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 398 transitions. [2021-11-13 02:44:21,314 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 398 transitions. Word has length 45 [2021-11-13 02:44:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:21,314 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 398 transitions. [2021-11-13 02:44:21,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 398 transitions. [2021-11-13 02:44:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 02:44:21,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:21,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:21,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:21,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:21,531 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1322710928, now seen corresponding path program 1 times [2021-11-13 02:44:21,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:21,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8315351] [2021-11-13 02:44:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:21,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:21,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:21,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:44:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:21,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:21,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:22,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:22,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8315351] [2021-11-13 02:44:22,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8315351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:22,075 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:22,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:44:22,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821656838] [2021-11-13 02:44:22,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:22,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:44:22,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:44:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:44:22,077 INFO L87 Difference]: Start difference. First operand 290 states and 398 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:22,272 INFO L93 Difference]: Finished difference Result 620 states and 859 transitions. [2021-11-13 02:44:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:44:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-11-13 02:44:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:22,278 INFO L225 Difference]: With dead ends: 620 [2021-11-13 02:44:22,286 INFO L226 Difference]: Without dead ends: 568 [2021-11-13 02:44:22,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:44:22,288 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:22,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 400 Invalid, 35 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [17 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 116.50ms Time] [2021-11-13 02:44:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-13 02:44:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 309. [2021-11-13 02:44:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 272 states have (on average 1.3088235294117647) internal successors, (356), 269 states have internal predecessors, (356), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (38), 38 states have call predecessors, (38), 31 states have call successors, (38) [2021-11-13 02:44:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 426 transitions. [2021-11-13 02:44:22,323 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 426 transitions. Word has length 46 [2021-11-13 02:44:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:22,324 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 426 transitions. [2021-11-13 02:44:22,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 426 transitions. [2021-11-13 02:44:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 02:44:22,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:22,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:22,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:22,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:22,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -514674649, now seen corresponding path program 1 times [2021-11-13 02:44:22,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:22,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823786494] [2021-11-13 02:44:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:22,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:22,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:22,543 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:22,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:44:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:22,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:44:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:22,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 02:44:22,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:22,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823786494] [2021-11-13 02:44:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823786494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:22,924 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:22,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 02:44:22,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115214195] [2021-11-13 02:44:22,925 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:22,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:44:22,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:44:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:44:22,926 INFO L87 Difference]: Start difference. First operand 309 states and 426 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:23,025 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2021-11-13 02:44:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:44:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-13 02:44:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:23,029 INFO L225 Difference]: With dead ends: 324 [2021-11-13 02:44:23,030 INFO L226 Difference]: Without dead ends: 266 [2021-11-13 02:44:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:44:23,031 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:23,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 294 Invalid, 8 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 41.34ms Time] [2021-11-13 02:44:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-13 02:44:23,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-11-13 02:44:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.3231441048034935) internal successors, (303), 228 states have internal predecessors, (303), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-13 02:44:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 371 transitions. [2021-11-13 02:44:23,061 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 371 transitions. Word has length 49 [2021-11-13 02:44:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:23,063 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 371 transitions. [2021-11-13 02:44:23,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 371 transitions. [2021-11-13 02:44:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 02:44:23,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:23,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:23,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:23,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:23,280 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash -627639643, now seen corresponding path program 1 times [2021-11-13 02:44:23,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:23,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388835099] [2021-11-13 02:44:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:23,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:23,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:23,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:44:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:44:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:44:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:44:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:44:23,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:44:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 02:44:23,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:44:23,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388835099] [2021-11-13 02:44:23,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388835099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:44:23,827 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:44:23,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 02:44:23,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982728425] [2021-11-13 02:44:23,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:44:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:44:23,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:44:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:44:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:44:23,828 INFO L87 Difference]: Start difference. First operand 266 states and 371 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:44:24,337 INFO L93 Difference]: Finished difference Result 418 states and 576 transitions. [2021-11-13 02:44:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 02:44:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-13 02:44:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:44:24,342 INFO L225 Difference]: With dead ends: 418 [2021-11-13 02:44:24,342 INFO L226 Difference]: Without dead ends: 376 [2021-11-13 02:44:24,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:44:24,344 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 147 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:44:24,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 533 Invalid, 79 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 292.15ms Time] [2021-11-13 02:44:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-13 02:44:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 266. [2021-11-13 02:44:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.314410480349345) internal successors, (301), 228 states have internal predecessors, (301), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-13 02:44:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 369 transitions. [2021-11-13 02:44:24,374 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 369 transitions. Word has length 50 [2021-11-13 02:44:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:44:24,375 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 369 transitions. [2021-11-13 02:44:24,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:44:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 369 transitions. [2021-11-13 02:44:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 02:44:24,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:44:24,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:24,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:24,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:24,598 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:44:24,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:44:24,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1892770879, now seen corresponding path program 1 times [2021-11-13 02:44:24,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:44:24,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913711333] [2021-11-13 02:44:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:44:24,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:44:24,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:44:24,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:44:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:44:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:44:24,660 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 02:44:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 02:44:24,815 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-13 02:44:24,815 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 02:44:24,816 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 02:44:24,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 02:44:24,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:44:25,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:44:25,022 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:44:25,026 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 02:44:25,045 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:44:25,048 INFO L158 Benchmark]: Toolchain (without parser) took 694843.44ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 40.0MB in the beginning and 63.2MB in the end (delta: -23.2MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,048 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 60.8MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:44:25,049 INFO L158 Benchmark]: CACSL2BoogieTranslator took 555.35ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 39.8MB in the end (delta: -69.5kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,049 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.97ms. Allocated memory is still 60.8MB. Free memory was 39.8MB in the beginning and 37.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,050 INFO L158 Benchmark]: Boogie Preprocessor took 49.25ms. Allocated memory is still 60.8MB. Free memory was 37.6MB in the beginning and 35.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,050 INFO L158 Benchmark]: RCFGBuilder took 2941.87ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 35.6MB in the beginning and 68.0MB in the end (delta: -32.3MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,050 INFO L158 Benchmark]: TraceAbstraction took 691199.34ms. Allocated memory is still 88.1MB. Free memory was 67.5MB in the beginning and 63.2MB in the end (delta: 4.3MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-11-13 02:44:25,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 60.8MB. Free memory was 41.1MB in the beginning and 41.0MB in the end (delta: 44.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 555.35ms. Allocated memory is still 60.8MB. Free memory was 39.7MB in the beginning and 39.8MB in the end (delta: -69.5kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.97ms. Allocated memory is still 60.8MB. Free memory was 39.8MB in the beginning and 37.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.25ms. Allocated memory is still 60.8MB. Free memory was 37.6MB in the beginning and 35.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2941.87ms. Allocated memory was 60.8MB in the beginning and 88.1MB in the end (delta: 27.3MB). Free memory was 35.6MB in the beginning and 68.0MB in the end (delta: -32.3MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 691199.34ms. Allocated memory is still 88.1MB. Free memory was 67.5MB in the beginning and 63.2MB in the end (delta: 4.3MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 02:44:25,277 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-13 02:44:25,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_297cdccc-495a-4398-945f-bcd1d614748b/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null