./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34606649fc24a0c6046cbbdfba3b9ddb6bb91120 ............................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i -s /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34606649fc24a0c6046cbbdfba3b9ddb6bb91120 ........................................................................................................................................................................................................................................................................................... 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 0.1.23-635dfa2 [2018-12-02 14:58:11,696 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 14:58:11,698 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 14:58:11,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 14:58:11,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 14:58:11,707 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 14:58:11,707 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 14:58:11,709 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 14:58:11,710 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 14:58:11,710 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 14:58:11,711 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 14:58:11,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 14:58:11,712 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 14:58:11,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 14:58:11,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 14:58:11,714 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 14:58:11,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 14:58:11,715 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 14:58:11,717 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 14:58:11,718 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 14:58:11,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 14:58:11,719 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 14:58:11,720 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 14:58:11,721 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 14:58:11,721 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 14:58:11,721 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 14:58:11,722 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 14:58:11,722 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 14:58:11,723 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 14:58:11,724 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 14:58:11,724 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 14:58:11,724 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 14:58:11,724 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 14:58:11,725 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 14:58:11,725 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 14:58:11,726 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 14:58:11,726 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 14:58:11,733 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 14:58:11,733 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 14:58:11,734 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 14:58:11,734 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 14:58:11,734 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 14:58:11,735 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 14:58:11,735 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 14:58:11,736 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 14:58:11,736 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 14:58:11,736 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 14:58:11,737 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 14:58:11,737 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 14:58:11,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 14:58:11,737 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 14:58:11,737 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan 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(__VERIFIER_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 -> 34606649fc24a0c6046cbbdfba3b9ddb6bb91120 [2018-12-02 14:58:11,754 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 14:58:11,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 14:58:11,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 14:58:11,767 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 14:58:11,767 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 14:58:11,768 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-12-02 14:58:11,803 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/a9ca56bf3/0b7f201cfbc547008e2db0afa7060c89/FLAG7d0c53500 [2018-12-02 14:58:12,197 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 14:58:12,198 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-12-02 14:58:12,201 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/a9ca56bf3/0b7f201cfbc547008e2db0afa7060c89/FLAG7d0c53500 [2018-12-02 14:58:12,209 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/a9ca56bf3/0b7f201cfbc547008e2db0afa7060c89 [2018-12-02 14:58:12,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 14:58:12,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 14:58:12,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 14:58:12,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 14:58:12,214 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 14:58:12,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409ee820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12, skipping insertion in model container [2018-12-02 14:58:12,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 14:58:12,229 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 14:58:12,320 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:58:12,322 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 14:58:12,331 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:58:12,339 INFO L195 MainTranslator]: Completed translation [2018-12-02 14:58:12,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12 WrapperNode [2018-12-02 14:58:12,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 14:58:12,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 14:58:12,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 14:58:12,340 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 14:58:12,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 14:58:12,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 14:58:12,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 14:58:12,353 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 14:58:12,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... [2018-12-02 14:58:12,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 14:58:12,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 14:58:12,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 14:58:12,397 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 14:58:12,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/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 [2018-12-02 14:58:12,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 14:58:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 14:58:12,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 14:58:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 14:58:12,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 14:58:12,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 14:58:12,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 14:58:12,431 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 14:58:12,521 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 14:58:12,521 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 14:58:12,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:12 BoogieIcfgContainer [2018-12-02 14:58:12,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 14:58:12,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 14:58:12,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 14:58:12,524 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 14:58:12,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:58:12" (1/3) ... [2018-12-02 14:58:12,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f5a732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:58:12, skipping insertion in model container [2018-12-02 14:58:12,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:12" (2/3) ... [2018-12-02 14:58:12,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f5a732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:58:12, skipping insertion in model container [2018-12-02 14:58:12,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:12" (3/3) ... [2018-12-02 14:58:12,526 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1_false-unreach-call.c.i [2018-12-02 14:58:12,532 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 14:58:12,536 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 14:58:12,545 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 14:58:12,564 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 14:58:12,564 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 14:58:12,564 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 14:58:12,564 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 14:58:12,564 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 14:58:12,564 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 14:58:12,564 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 14:58:12,564 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 14:58:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-02 14:58:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 14:58:12,578 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:58:12,579 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:58:12,580 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 14:58:12,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:58:12,583 INFO L82 PathProgramCache]: Analyzing trace with hash -722424895, now seen corresponding path program 1 times [2018-12-02 14:58:12,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:58:12,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:58:12,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:58:12,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:58:12,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:58:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:58:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:58:12,648 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:58:12,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 14:58:12,648 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 14:58:12,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 14:58:12,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 14:58:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 14:58:12,660 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-02 14:58:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:58:12,671 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-12-02 14:58:12,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 14:58:12,672 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 14:58:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:58:12,676 INFO L225 Difference]: With dead ends: 31 [2018-12-02 14:58:12,676 INFO L226 Difference]: Without dead ends: 12 [2018-12-02 14:58:12,678 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 14:58:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-02 14:58:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-02 14:58:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-02 14:58:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-02 14:58:12,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-02 14:58:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:58:12,698 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-02 14:58:12,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 14:58:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-02 14:58:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-02 14:58:12,699 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:58:12,699 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:58:12,699 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 14:58:12,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:58:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1142459876, now seen corresponding path program 1 times [2018-12-02 14:58:12,699 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 14:58:12,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:58:12,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:58:12,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 14:58:12,700 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 14:58:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:58:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:58:12,725 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 14:58:12,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:58:12 BoogieIcfgContainer [2018-12-02 14:58:12,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 14:58:12,739 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 14:58:12,739 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 14:58:12,739 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 14:58:12,739 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:12" (3/4) ... [2018-12-02 14:58:12,741 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-02 14:58:12,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 14:58:12,742 INFO L168 Benchmark]: Toolchain (without parser) took 530.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 956.7 MB in the beginning and 1.0 GB in the end (delta: -59.1 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:12,743 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:12,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 127.24 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:12,744 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.99 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:12,744 INFO L168 Benchmark]: Boogie Preprocessor took 44.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -111.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:12,744 INFO L168 Benchmark]: RCFGBuilder took 124.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:12,745 INFO L168 Benchmark]: TraceAbstraction took 216.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:12,745 INFO L168 Benchmark]: Witness Printer took 2.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:12,747 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 127.24 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.99 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 44.41 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 67.1 MB). Free memory was 945.9 MB in the beginning and 1.1 GB in the end (delta: -111.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 124.39 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 216.47 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 29.5 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.74 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 32, overapproximation of someBinaryArithmeticFLOAToperation at line 24. Possible FailurePath: [L15] float x = __VERIFIER_nondet_float() ; [L16] float exp = 1.0 ; [L17] float term = 1.0 ; [L18] unsigned int count = 1 ; [L19] float result = 2*(1/(1-x)) ; [L20] int temp ; VAL [count=1, exp=1, term=1, x=2] [L22] COND TRUE 1 [L24] term = term * (x/count) [L25] exp = exp + term [L26] count++ [L28] temp = __VERIFIER_nondet_int() [L29] COND TRUE temp ==0 VAL [count=2, temp=0, x=2] [L32] CALL __VERIFIER_assert( result >= exp ) VAL [\old(cond)=0] [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: 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 0.1.23-635dfa2 [2018-12-02 14:58:14,082 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 14:58:14,083 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 14:58:14,090 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 14:58:14,090 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 14:58:14,091 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 14:58:14,092 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 14:58:14,093 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 14:58:14,094 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 14:58:14,095 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 14:58:14,095 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 14:58:14,096 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 14:58:14,096 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 14:58:14,097 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 14:58:14,098 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 14:58:14,098 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 14:58:14,099 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 14:58:14,100 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 14:58:14,102 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 14:58:14,103 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 14:58:14,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 14:58:14,105 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 14:58:14,106 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 14:58:14,107 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 14:58:14,107 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 14:58:14,107 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 14:58:14,108 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 14:58:14,109 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 14:58:14,109 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 14:58:14,110 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 14:58:14,110 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 14:58:14,111 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 14:58:14,111 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 14:58:14,111 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 14:58:14,112 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 14:58:14,112 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 14:58:14,112 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-02 14:58:14,123 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 14:58:14,123 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 14:58:14,124 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 14:58:14,124 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 14:58:14,124 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 14:58:14,124 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 14:58:14,124 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 14:58:14,124 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 14:58:14,124 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 14:58:14,125 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 14:58:14,125 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 14:58:14,125 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 14:58:14,125 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 14:58:14,125 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 14:58:14,125 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 14:58:14,126 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 14:58:14,127 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 14:58:14,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 14:58:14,127 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-02 14:58:14,128 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan 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(__VERIFIER_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 -> 34606649fc24a0c6046cbbdfba3b9ddb6bb91120 [2018-12-02 14:58:14,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 14:58:14,160 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 14:58:14,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 14:58:14,164 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 14:58:14,164 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 14:58:14,165 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-12-02 14:58:14,207 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/f3bf38015/150640db17bc4461911599586b9e9b27/FLAG46d64fc5e [2018-12-02 14:58:14,587 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 14:58:14,587 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-12-02 14:58:14,592 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/f3bf38015/150640db17bc4461911599586b9e9b27/FLAG46d64fc5e [2018-12-02 14:58:14,600 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/data/f3bf38015/150640db17bc4461911599586b9e9b27 [2018-12-02 14:58:14,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 14:58:14,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 14:58:14,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 14:58:14,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 14:58:14,606 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 14:58:14,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfa0d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14, skipping insertion in model container [2018-12-02 14:58:14,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 14:58:14,626 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 14:58:14,720 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:58:14,724 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 14:58:14,734 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 14:58:14,742 INFO L195 MainTranslator]: Completed translation [2018-12-02 14:58:14,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14 WrapperNode [2018-12-02 14:58:14,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 14:58:14,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 14:58:14,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 14:58:14,743 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 14:58:14,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 14:58:14,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 14:58:14,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 14:58:14,757 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 14:58:14,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... [2018-12-02 14:58:14,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 14:58:14,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 14:58:14,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 14:58:14,773 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 14:58:14,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/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 [2018-12-02 14:58:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-02 14:58:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-02 14:58:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 14:58:14,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 14:58:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-02 14:58:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-02 14:58:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-02 14:58:14,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-02 14:58:17,326 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 14:58:17,326 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-02 14:58:17,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:17 BoogieIcfgContainer [2018-12-02 14:58:17,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 14:58:17,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 14:58:17,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 14:58:17,329 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 14:58:17,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:58:14" (1/3) ... [2018-12-02 14:58:17,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1578ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:58:17, skipping insertion in model container [2018-12-02 14:58:17,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:58:14" (2/3) ... [2018-12-02 14:58:17,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1578ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:58:17, skipping insertion in model container [2018-12-02 14:58:17,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:17" (3/3) ... [2018-12-02 14:58:17,331 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1_false-unreach-call.c.i [2018-12-02 14:58:17,337 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 14:58:17,341 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 14:58:17,350 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 14:58:17,367 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 14:58:17,367 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 14:58:17,367 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 14:58:17,368 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 14:58:17,368 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 14:58:17,368 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 14:58:17,368 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 14:58:17,368 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 14:58:17,368 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 14:58:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-02 14:58:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-02 14:58:17,381 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:58:17,381 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:58:17,382 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 14:58:17,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:58:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash -722424895, now seen corresponding path program 1 times [2018-12-02 14:58:17,388 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 14:58:17,388 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/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 [2018-12-02 14:58:17,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:58:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 14:58:17,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 14:58:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 14:58:17,623 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 14:58:17,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 14:58:17,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-02 14:58:17,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-02 14:58:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-02 14:58:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 14:58:17,646 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-02 14:58:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 14:58:17,657 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-12-02 14:58:17,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-02 14:58:17,658 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-02 14:58:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 14:58:17,662 INFO L225 Difference]: With dead ends: 31 [2018-12-02 14:58:17,663 INFO L226 Difference]: Without dead ends: 12 [2018-12-02 14:58:17,664 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-02 14:58:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-12-02 14:58:17,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-02 14:58:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-02 14:58:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-12-02 14:58:17,685 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-12-02 14:58:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 14:58:17,685 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-12-02 14:58:17,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-02 14:58:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-12-02 14:58:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-02 14:58:17,685 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 14:58:17,686 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 14:58:17,686 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 14:58:17,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 14:58:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1142459876, now seen corresponding path program 1 times [2018-12-02 14:58:17,686 INFO L223 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-12-02 14:58:17,686 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/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 [2018-12-02 14:58:17,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 14:58:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:58:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-02 14:58:18,702 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-02 14:58:18,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:58:18 BoogieIcfgContainer [2018-12-02 14:58:18,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 14:58:18,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 14:58:18,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 14:58:18,720 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 14:58:18,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:58:17" (3/4) ... [2018-12-02 14:58:18,721 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-02 14:58:18,745 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_84a8f1f0-7209-4589-b201-80ca5539ba76/bin-2019/utaipan/witness.graphml [2018-12-02 14:58:18,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 14:58:18,746 INFO L168 Benchmark]: Toolchain (without parser) took 4142.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -120.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:18,746 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:18,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.85 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 932.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:18,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.42 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:18,747 INFO L168 Benchmark]: Boogie Preprocessor took 15.78 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:18,747 INFO L168 Benchmark]: RCFGBuilder took 2553.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -175.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:18,748 INFO L168 Benchmark]: TraceAbstraction took 1392.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. [2018-12-02 14:58:18,748 INFO L168 Benchmark]: Witness Printer took 25.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 14:58:18,750 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.85 ms. Allocated memory is still 1.0 GB. Free memory was 944.7 MB in the beginning and 932.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.42 ms. Allocated memory is still 1.0 GB. Free memory is still 932.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.78 ms. Allocated memory is still 1.0 GB. Free memory was 932.6 MB in the beginning and 927.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 2553.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 927.3 MB in the beginning and 1.1 GB in the end (delta: -175.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1392.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 11.5 GB. * Witness Printer took 25.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] float x = __VERIFIER_nondet_float() ; [L16] float exp = 1.0 ; [L17] float term = 1.0 ; [L18] unsigned int count = 1 ; [L19] float result = 2*(1/(1-x)) ; [L20] int temp ; VAL [count=1, exp=1.0, result=-273.0666809082031, term=1.0, x=1.00732421875] [L22] COND TRUE 1 [L24] term = term * (x/count) [L25] exp = exp + term [L26] count++ [L28] temp = __VERIFIER_nondet_int() [L29] COND TRUE temp ==0 VAL [count=2, exp=2.00732421875, result=-273.0666809082031, temp=0, term=1.00732421875, x=1.00732421875] [L32] CALL __VERIFIER_assert( result >= exp ) VAL [\old(cond)=0] [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 1.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...