./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI --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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI --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 eb1826e8952b1eb941e064a85d9720fcb947ea7c ............................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:21:24,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:24,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:24,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:24,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:24,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:24,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:24,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:24,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:24,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:24,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:24,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:24,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:24,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:24,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:24,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:24,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:24,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:24,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:24,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:24,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:24,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:24,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:24,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:24,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:24,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:24,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:24,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:24,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:24,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:24,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:24,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:24,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:24,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:24,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:24,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:24,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:24,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:24,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:24,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:24,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:24,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:21:24,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:24,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:24,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:24,302 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:24,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:24,303 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:24,303 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:24,303 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:24,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:24,310 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:24,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:24,311 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:24,311 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:24,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:24,312 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:24,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:24,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:24,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:24,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:24,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:24,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:24,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:24,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:24,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:24,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:24,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:24,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:24,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:24,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:24,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:24,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:24,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:24,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:24,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:24,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:24,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:24,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:24,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:24,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:24,320 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2021-10-11 02:21:24,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:24,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:24,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:24,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:24,625 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:24,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/floats-cdfpl/square_1.i [2021-10-11 02:21:24,694 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/47cab709e/ca6d1d0376154c96a39da86929ddba57/FLAG302d0a513 [2021-10-11 02:21:25,220 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:25,220 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i [2021-10-11 02:21:25,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/47cab709e/ca6d1d0376154c96a39da86929ddba57/FLAG302d0a513 [2021-10-11 02:21:25,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/47cab709e/ca6d1d0376154c96a39da86929ddba57 [2021-10-11 02:21:25,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:25,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:25,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:25,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:25,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:25,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3182c515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25, skipping insertion in model container [2021-10-11 02:21:25,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:25,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:25,802 WARN L226 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i[1128,1141] [2021-10-11 02:21:25,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:25,815 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:25,831 WARN L226 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i[1128,1141] [2021-10-11 02:21:25,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:25,846 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:25,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25 WrapperNode [2021-10-11 02:21:25,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:25,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:25,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:25,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:25,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:25,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:25,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:25,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:25,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... [2021-10-11 02:21:25,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:25,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:25,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:25,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:25,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:21:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:26,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:26,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:26,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:26,361 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:21:26,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:26 BoogieIcfgContainer [2021-10-11 02:21:26,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:26,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:26,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:26,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:26,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:25" (1/3) ... [2021-10-11 02:21:26,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595f28a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:26, skipping insertion in model container [2021-10-11 02:21:26,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:25" (2/3) ... [2021-10-11 02:21:26,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595f28a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:26, skipping insertion in model container [2021-10-11 02:21:26,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:26" (3/3) ... [2021-10-11 02:21:26,374 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2021-10-11 02:21:26,403 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:26,406 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:26,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:26,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:26,481 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:26,481 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:26,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:26,482 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:26,482 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:26,482 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:26,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:21:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:21:26,500 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:26,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:21:26,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 56123, now seen corresponding path program 1 times [2021-10-11 02:21:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:26,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410791522] [2021-10-11 02:21:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:26,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:26,667 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:26,698 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:21:26,699 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:21:26,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:26,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:26 BoogieIcfgContainer [2021-10-11 02:21:26,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:26,727 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:26,727 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:26,727 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:26,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:26" (3/4) ... [2021-10-11 02:21:26,741 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:21:26,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:26,747 INFO L168 Benchmark]: Toolchain (without parser) took 1158.10 ms. Allocated memory is still 117.4 MB. Free memory was 81.5 MB in the beginning and 61.8 MB in the end (delta: 19.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:26,749 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 117.4 MB. Free memory was 90.9 MB in the beginning and 90.9 MB in the end (delta: 30.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:26,752 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.22 ms. Allocated memory is still 117.4 MB. Free memory was 81.5 MB in the beginning and 91.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:26,753 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.40 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:26,755 INFO L168 Benchmark]: Boogie Preprocessor took 37.38 ms. Allocated memory is still 117.4 MB. Free memory was 90.5 MB in the beginning and 89.6 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:26,756 INFO L168 Benchmark]: RCFGBuilder took 441.37 ms. Allocated memory is still 117.4 MB. Free memory was 89.6 MB in the beginning and 74.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:26,757 INFO L168 Benchmark]: TraceAbstraction took 359.54 ms. Allocated memory is still 117.4 MB. Free memory was 73.8 MB in the beginning and 62.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:26,759 INFO L168 Benchmark]: Witness Printer took 18.32 ms. Allocated memory is still 117.4 MB. Free memory was 62.4 MB in the beginning and 61.8 MB in the end (delta: 613.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:26,766 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 117.4 MB. Free memory was 90.9 MB in the beginning and 90.9 MB in the end (delta: 30.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.22 ms. Allocated memory is still 117.4 MB. Free memory was 81.5 MB in the beginning and 91.7 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.40 ms. Allocated memory is still 117.4 MB. Free memory was 91.7 MB in the beginning and 90.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.38 ms. Allocated memory is still 117.4 MB. Free memory was 90.5 MB in the beginning and 89.6 MB in the end (delta: 893.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 441.37 ms. Allocated memory is still 117.4 MB. Free memory was 89.6 MB in the beginning and 74.4 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 359.54 ms. Allocated memory is still 117.4 MB. Free memory was 73.8 MB in the beginning and 62.4 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 18.32 ms. Allocated memory is still 117.4 MB. Free memory was 62.4 MB in the beginning and 61.8 MB in the end (delta: 613.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 < 1.39f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:21:29,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:29,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:29,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:29,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:29,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:29,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:29,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:29,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:29,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:29,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:29,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:29,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:29,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:29,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:29,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:29,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:29,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:29,371 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:29,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:29,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:29,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:29,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:29,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:29,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:29,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:29,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:29,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:29,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:29,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:29,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:29,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:29,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:29,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:29,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:29,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:29,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:29,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:29,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:29,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:29,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:29,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:21:29,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:29,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:29,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:29,454 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:29,454 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:29,454 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:29,455 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:29,455 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:29,455 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:29,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:29,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:29,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:29,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:29,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:29,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:29,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:29,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:29,459 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:21:29,459 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:21:29,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:29,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:29,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:29,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:29,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:29,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:21:29,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:29,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:29,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:29,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:29,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:29,462 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:21:29,462 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:21:29,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:29,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:29,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:29,463 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1826e8952b1eb941e064a85d9720fcb947ea7c [2021-10-11 02:21:29,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:29,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:29,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:29,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:29,913 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:29,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/floats-cdfpl/square_1.i [2021-10-11 02:21:29,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/5dd651eac/30acc2eb44b44e80967e96871e463cd9/FLAG1403effcf [2021-10-11 02:21:30,438 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:30,439 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i [2021-10-11 02:21:30,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/5dd651eac/30acc2eb44b44e80967e96871e463cd9/FLAG1403effcf [2021-10-11 02:21:30,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/data/5dd651eac/30acc2eb44b44e80967e96871e463cd9 [2021-10-11 02:21:30,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:30,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:30,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:30,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:30,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:30,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:30" (1/1) ... [2021-10-11 02:21:30,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6828b740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:30, skipping insertion in model container [2021-10-11 02:21:30,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:30" (1/1) ... [2021-10-11 02:21:30,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:30,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:31,082 WARN L226 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i[1128,1141] [2021-10-11 02:21:31,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:31,100 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:31,141 WARN L226 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_6e8b6fa0-f3d9-458b-b902-58b863d1d043/sv-benchmarks/c/floats-cdfpl/square_1.i[1128,1141] [2021-10-11 02:21:31,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:31,192 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:31,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31 WrapperNode [2021-10-11 02:21:31,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:31,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:31,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:31,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:31,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:31,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:31,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:31,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:31,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... [2021-10-11 02:21:31,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:31,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:31,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:31,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:31,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:21:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:31,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:31,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:33,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:33,716 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:21:33,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:33 BoogieIcfgContainer [2021-10-11 02:21:33,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:33,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:33,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:33,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:33,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:30" (1/3) ... [2021-10-11 02:21:33,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c1eab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:33, skipping insertion in model container [2021-10-11 02:21:33,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:31" (2/3) ... [2021-10-11 02:21:33,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c1eab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:33, skipping insertion in model container [2021-10-11 02:21:33,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:33" (3/3) ... [2021-10-11 02:21:33,727 INFO L111 eAbstractionObserver]: Analyzing ICFG square_1.i [2021-10-11 02:21:33,746 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:33,749 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:33,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:33,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:33,805 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:33,805 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:33,805 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:33,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:33,806 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:33,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:33,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:21:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:21:33,823 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:33,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:21:33,824 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:33,830 INFO L82 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2021-10-11 02:21:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:21:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598656130] [2021-10-11 02:21:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:21:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:21:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:34,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:21:34,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598656130] [2021-10-11 02:21:34,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:34,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:34,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383634915] [2021-10-11 02:21:34,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:21:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:21:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:21:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:21:34,464 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-10-11 02:21:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:34,477 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-11 02:21:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:21:34,479 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:21:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:34,486 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:21:34,486 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:21:34,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:21:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:21:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:21:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:21:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-11 02:21:34,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-11 02:21:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:34,522 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-11 02:21:34,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:21:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-11 02:21:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:21:34,522 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:34,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:21:34,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:21:34,744 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2021-10-11 02:21:34,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:21:34,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707438615] [2021-10-11 02:21:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:21:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:54,117 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:22:23,541 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:23,623 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:22:23,623 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:22:23,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:22:23,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:23 BoogieIcfgContainer [2021-10-11 02:22:23,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:23,845 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:23,845 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:23,845 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:23,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:33" (3/4) ... [2021-10-11 02:22:23,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:22:23,894 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e8b6fa0-f3d9-458b-b902-58b863d1d043/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:23,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:23,902 INFO L168 Benchmark]: Toolchain (without parser) took 53067.86 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 29.5 MB in the beginning and 47.5 MB in the end (delta: -18.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:23,903 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 52.4 MB. Free memory was 33.9 MB in the beginning and 33.9 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:23,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.78 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 29.3 MB in the beginning and 52.2 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:23,906 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.93 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:23,907 INFO L168 Benchmark]: Boogie Preprocessor took 47.31 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:23,910 INFO L168 Benchmark]: RCFGBuilder took 2421.36 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 38.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:23,911 INFO L168 Benchmark]: TraceAbstraction took 50124.42 ms. Allocated memory is still 69.2 MB. Free memory was 38.0 MB in the beginning and 49.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:23,914 INFO L168 Benchmark]: Witness Printer took 49.97 ms. Allocated memory is still 69.2 MB. Free memory was 49.3 MB in the beginning and 47.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:23,918 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 52.4 MB. Free memory was 33.9 MB in the beginning and 33.9 MB in the end (delta: 38.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.78 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 29.3 MB in the beginning and 52.2 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.93 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.31 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2421.36 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 38.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 50124.42 ms. Allocated memory is still 69.2 MB. Free memory was 38.0 MB in the beginning and 49.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Witness Printer took 49.97 ms. Allocated memory is still 69.2 MB. Free memory was 49.3 MB in the beginning and 47.5 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: - 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 < 1.39f) [L29] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 50.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, 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, 19.8s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 26 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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! Received shutdown request...