./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash afd3d60adf6d74af5e117b4ac2c7c77a7ae5adcf510e57462451615dfc94647e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:40:20,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:40:20,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:40:20,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:40:20,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:40:20,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:40:20,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:40:20,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:40:20,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:40:20,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:40:20,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:40:20,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:40:20,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:40:20,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:40:20,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:40:20,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:40:20,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:40:20,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:40:20,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:40:20,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:40:20,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:40:20,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:40:20,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:40:20,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:40:20,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:40:20,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:40:20,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:40:20,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:40:20,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:40:20,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:40:20,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:40:20,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:40:20,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:40:20,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:40:20,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:40:20,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:40:20,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:40:20,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:40:20,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:40:20,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:40:20,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:40:20,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:40:20,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:40:20,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:40:20,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:40:20,214 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:40:20,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:40:20,215 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:40:20,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:40:20,215 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:40:20,221 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:40:20,221 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:40:20,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:40:20,223 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:40:20,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:40:20,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:40:20,224 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:40:20,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:40:20,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:40:20,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:40:20,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:40:20,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:40:20,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:40:20,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:40:20,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:40:20,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:40:20,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:40:20,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:40:20,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:40:20,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:40:20,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:40:20,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:40:20,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:40:20,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:40:20,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:40:20,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:40:20,233 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:40:20,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:40:20,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:40:20,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:40:20,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:40:20,234 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_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afd3d60adf6d74af5e117b4ac2c7c77a7ae5adcf510e57462451615dfc94647e [2021-11-03 04:40:20,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:40:20,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:40:20,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:40:20,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:40:20,505 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:40:20,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2021-11-03 04:40:20,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/7f8fa425c/a2dcc68cee0b4462b26925c459eb703c/FLAG88df922e6 [2021-11-03 04:40:20,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:40:20,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i [2021-11-03 04:40:21,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/7f8fa425c/a2dcc68cee0b4462b26925c459eb703c/FLAG88df922e6 [2021-11-03 04:40:21,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/7f8fa425c/a2dcc68cee0b4462b26925c459eb703c [2021-11-03 04:40:21,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:40:21,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:40:21,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:40:21,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:40:21,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:40:21,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d84f290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21, skipping insertion in model container [2021-11-03 04:40:21,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:40:21,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:40:21,614 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_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-11-03 04:40:21,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:40:21,625 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:40:21,641 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_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-11-03 04:40:21,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:40:21,655 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:40:21,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21 WrapperNode [2021-11-03 04:40:21,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:40:21,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:40:21,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:40:21,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:40:21,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:40:21,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:40:21,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:40:21,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:40:21,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:40:21,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:40:21,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:40:21,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:40:21,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (1/1) ... [2021-11-03 04:40:21,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:40:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:40:21,744 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:40:21,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:40:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:40:21,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:40:21,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:40:21,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:40:21,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:40:21,996 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-03 04:40:21,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:21 BoogieIcfgContainer [2021-11-03 04:40:21,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:40:22,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:40:22,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:40:22,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:40:22,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:40:21" (1/3) ... [2021-11-03 04:40:22,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a130c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:40:22, skipping insertion in model container [2021-11-03 04:40:22,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:21" (2/3) ... [2021-11-03 04:40:22,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a130c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:40:22, skipping insertion in model container [2021-11-03 04:40:22,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:21" (3/3) ... [2021-11-03 04:40:22,022 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2021-11-03 04:40:22,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:40:22,039 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:40:22,118 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:40:22,124 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:40:22,136 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:40:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:40:22,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:22,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:40:22,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2021-11-03 04:40:22,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:40:22,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212022149] [2021-11-03 04:40:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:22,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:40:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:40:22,299 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 04:40:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:40:22,371 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 04:40:22,373 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 04:40:22,374 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:40:22,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:40:22,379 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-03 04:40:22,382 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:40:22,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:40:22 BoogieIcfgContainer [2021-11-03 04:40:22,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:40:22,404 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:40:22,404 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:40:22,405 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:40:22,405 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:21" (3/4) ... [2021-11-03 04:40:22,408 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 04:40:22,408 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:40:22,414 INFO L168 Benchmark]: Toolchain (without parser) took 991.34 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 65.3 MB in the beginning and 66.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,415 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:40:22,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.95 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 65.1 MB in the beginning and 93.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,418 INFO L168 Benchmark]: Boogie Preprocessor took 16.86 ms. Allocated memory is still 117.4 MB. Free memory was 91.1 MB in the beginning and 90.4 MB in the end (delta: 743.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,419 INFO L168 Benchmark]: RCFGBuilder took 291.54 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 79.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,425 INFO L168 Benchmark]: TraceAbstraction took 400.86 ms. Allocated memory is still 117.4 MB. Free memory was 79.5 MB in the beginning and 66.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:40:22,426 INFO L168 Benchmark]: Witness Printer took 4.64 ms. Allocated memory is still 117.4 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:40:22,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 96.5 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.95 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 65.1 MB in the beginning and 93.0 MB in the end (delta: -27.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 117.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.86 ms. Allocated memory is still 117.4 MB. Free memory was 91.1 MB in the beginning and 90.4 MB in the end (delta: 743.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 291.54 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 79.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 400.86 ms. Allocated memory is still 117.4 MB. Free memory was 79.5 MB in the beginning and 66.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.64 ms. Allocated memory is still 117.4 MB. Free memory is still 66.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 29]: 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 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, 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: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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, 3 NumberOfCodeBlocks, 3 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 [2021-11-03 04:40:22,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash afd3d60adf6d74af5e117b4ac2c7c77a7ae5adcf510e57462451615dfc94647e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:40:24,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:40:24,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:40:24,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:40:24,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:40:24,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:40:24,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:40:24,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:40:24,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:40:24,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:40:24,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:40:24,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:40:24,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:40:24,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:40:24,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:40:24,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:40:24,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:40:24,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:40:24,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:40:25,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:40:25,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:40:25,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:40:25,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:40:25,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:40:25,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:40:25,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:40:25,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:40:25,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:40:25,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:40:25,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:40:25,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:40:25,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:40:25,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:40:25,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:40:25,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:40:25,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:40:25,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:40:25,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:40:25,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:40:25,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:40:25,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:40:25,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:40:25,086 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:40:25,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:40:25,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:40:25,088 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:40:25,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:40:25,089 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:40:25,089 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:40:25,089 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:40:25,089 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:40:25,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:40:25,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:40:25,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:40:25,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:40:25,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:40:25,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:40:25,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:40:25,093 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:40:25,094 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:40:25,094 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:40:25,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:40:25,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:40:25,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:40:25,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:40:25,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:40:25,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:40:25,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:40:25,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:40:25,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:40:25,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:40:25,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:40:25,096 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:40:25,097 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:40:25,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:40:25,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:40:25,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:40:25,098 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_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afd3d60adf6d74af5e117b4ac2c7c77a7ae5adcf510e57462451615dfc94647e [2021-11-03 04:40:25,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:40:25,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:40:25,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:40:25,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:40:25,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:40:25,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2021-11-03 04:40:25,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/818e54be1/ea68543a7ea243eb87b04e63c88186cc/FLAG95b1d8132 [2021-11-03 04:40:26,117 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:40:26,118 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i [2021-11-03 04:40:26,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/818e54be1/ea68543a7ea243eb87b04e63c88186cc/FLAG95b1d8132 [2021-11-03 04:40:26,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/data/818e54be1/ea68543a7ea243eb87b04e63c88186cc [2021-11-03 04:40:26,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:40:26,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:40:26,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:40:26,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:40:26,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:40:26,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16420a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26, skipping insertion in model container [2021-11-03 04:40:26,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:40:26,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:40:26,705 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_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-11-03 04:40:26,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:40:26,724 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:40:26,741 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_30110886-1104-45e9-ae1f-facc80e9836e/sv-benchmarks/c/floats-cdfpl/square_2.i[1129,1142] [2021-11-03 04:40:26,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:40:26,756 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:40:26,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26 WrapperNode [2021-11-03 04:40:26,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:40:26,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:40:26,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:40:26,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:40:26,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:40:26,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:40:26,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:40:26,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:40:26,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:40:26,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:40:26,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:40:26,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:40:26,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (1/1) ... [2021-11-03 04:40:26,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:40:26,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:40:26,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:40:26,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:40:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:40:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:40:26,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:40:26,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:40:29,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:40:29,253 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-03 04:40:29,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:29 BoogieIcfgContainer [2021-11-03 04:40:29,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:40:29,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:40:29,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:40:29,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:40:29,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:40:26" (1/3) ... [2021-11-03 04:40:29,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671d6011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:40:29, skipping insertion in model container [2021-11-03 04:40:29,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:40:26" (2/3) ... [2021-11-03 04:40:29,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671d6011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:40:29, skipping insertion in model container [2021-11-03 04:40:29,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:29" (3/3) ... [2021-11-03 04:40:29,263 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2021-11-03 04:40:29,268 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:40:29,269 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:40:29,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:40:29,320 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:40:29,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:40:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:40:29,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:29,338 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:40:29,338 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-11-03 04:40:29,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:29,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911745614] [2021-11-03 04:40:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:29,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:29,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:29,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:40:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:29,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:40:29,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:40:29,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:40:29,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:30,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911745614] [2021-11-03 04:40:30,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911745614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:30,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:30,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:40:30,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21012797] [2021-11-03 04:40:30,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:40:30,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:30,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:40:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:40:30,022 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:30,034 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-03 04:40:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:40:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:40:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:30,041 INFO L225 Difference]: With dead ends: 19 [2021-11-03 04:40:30,042 INFO L226 Difference]: Without dead ends: 7 [2021-11-03 04:40:30,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:40:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-03 04:40:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-03 04:40:30,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-11-03 04:40:30,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-11-03 04:40:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:30,069 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-11-03 04:40:30,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:30,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-11-03 04:40:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:40:30,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:30,071 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:40:30,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:30,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:30,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:30,293 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-11-03 04:40:30,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:30,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387135071] [2021-11-03 04:40:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:30,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:30,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:30,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:30,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:41:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:41:29,622 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 04:42:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 04:42:58,008 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-03 04:42:58,009 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 04:42:58,010 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:42:58,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:42:58,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:58,215 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-03 04:42:58,217 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:42:58,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:42:58 BoogieIcfgContainer [2021-11-03 04:42:58,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:42:58,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:42:58,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:42:58,242 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:42:58,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:40:29" (3/4) ... [2021-11-03 04:42:58,244 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 04:42:58,289 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 04:42:58,289 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:42:58,291 INFO L168 Benchmark]: Toolchain (without parser) took 151814.96 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 37.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,291 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:42:58,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.29 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 36.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,293 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.02 ms. Allocated memory is still 67.1 MB. Free memory was 36.5 MB in the beginning and 50.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,293 INFO L168 Benchmark]: Boogie Preprocessor took 24.60 ms. Allocated memory is still 67.1 MB. Free memory was 50.0 MB in the beginning and 48.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:42:58,294 INFO L168 Benchmark]: RCFGBuilder took 2391.80 ms. Allocated memory is still 67.1 MB. Free memory was 48.9 MB in the beginning and 39.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,294 INFO L168 Benchmark]: TraceAbstraction took 148984.08 ms. Allocated memory is still 67.1 MB. Free memory was 39.4 MB in the beginning and 38.8 MB in the end (delta: 636.5 kB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,300 INFO L168 Benchmark]: Witness Printer took 47.70 ms. Allocated memory is still 67.1 MB. Free memory was 38.8 MB in the beginning and 37.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:42:58,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 67.1 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.29 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 36.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.02 ms. Allocated memory is still 67.1 MB. Free memory was 36.5 MB in the beginning and 50.0 MB in the end (delta: -13.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.60 ms. Allocated memory is still 67.1 MB. Free memory was 50.0 MB in the beginning and 48.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2391.80 ms. Allocated memory is still 67.1 MB. Free memory was 48.9 MB in the beginning and 39.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 148984.08 ms. Allocated memory is still 67.1 MB. Free memory was 39.4 MB in the beginning and 38.8 MB in the end (delta: 636.5 kB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Witness Printer took 47.70 ms. Allocated memory is still 67.1 MB. Free memory was 38.8 MB in the beginning and 37.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 29]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 148.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 59.7s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 26 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be incorrect! [2021-11-03 04:42:58,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30110886-1104-45e9-ae1f-facc80e9836e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE