./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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 0.1.23-1dbac8b [2018-10-26 20:34:36,398 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:34:36,399 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:34:36,408 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:34:36,409 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:34:36,410 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:34:36,410 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:34:36,412 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:34:36,413 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:34:36,414 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:34:36,415 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:34:36,415 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:34:36,415 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:34:36,416 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:34:36,417 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:34:36,417 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:34:36,418 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:34:36,419 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:34:36,421 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:34:36,422 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:34:36,422 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:34:36,423 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:34:36,425 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:34:36,425 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:34:36,425 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:34:36,426 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:34:36,427 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:34:36,427 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:34:36,428 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:34:36,428 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:34:36,429 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:34:36,429 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:34:36,429 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:34:36,429 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:34:36,430 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:34:36,430 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:34:36,431 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 20:34:36,441 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:34:36,441 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:34:36,442 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:34:36,442 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 20:34:36,442 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 20:34:36,442 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 20:34:36,442 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 20:34:36,442 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 20:34:36,442 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 20:34:36,443 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 20:34:36,443 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 20:34:36,443 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:34:36,443 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:34:36,443 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:34:36,444 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:34:36,445 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:34:36,445 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:34:36,445 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:34:36,446 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:34:36,446 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 20:34:36,446 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:34:36,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:34:36,446 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:34:36,446 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_4fcbf133-80c2-4b70-b71b-6bc176539210/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 [2018-10-26 20:34:36,478 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:34:36,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:34:36,495 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:34:36,496 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:34:36,496 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:34:36,496 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-10-26 20:34:36,538 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/31e47aab2/c5b31e9fc4ae4d3a9f611d1187c7546a/FLAG9bde9eacd [2018-10-26 20:34:36,906 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:34:36,906 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-10-26 20:34:36,912 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/31e47aab2/c5b31e9fc4ae4d3a9f611d1187c7546a/FLAG9bde9eacd [2018-10-26 20:34:36,921 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/31e47aab2/c5b31e9fc4ae4d3a9f611d1187c7546a [2018-10-26 20:34:36,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:34:36,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:34:36,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:34:36,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:34:36,929 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:34:36,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:34:36" (1/1) ... [2018-10-26 20:34:36,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493cd4f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:36, skipping insertion in model container [2018-10-26 20:34:36,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:34:36" (1/1) ... [2018-10-26 20:34:36,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:34:36,954 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:34:37,073 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:34:37,076 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:34:37,094 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:34:37,105 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:34:37,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37 WrapperNode [2018-10-26 20:34:37,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:34:37,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:34:37,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:34:37,107 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:34:37,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:34:37,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:34:37,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:34:37,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:34:37,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... [2018-10-26 20:34:37,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:34:37,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:34:37,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:34:37,144 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:34:37,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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 [2018-10-26 20:34:37,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:34:37,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:34:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:34:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:34:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:34:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:34:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 20:34:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 20:34:37,505 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:34:37,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:37 BoogieIcfgContainer [2018-10-26 20:34:37,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:34:37,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:34:37,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:34:37,512 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:34:37,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:34:36" (1/3) ... [2018-10-26 20:34:37,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f011c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:34:37, skipping insertion in model container [2018-10-26 20:34:37,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:37" (2/3) ... [2018-10-26 20:34:37,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f011c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:34:37, skipping insertion in model container [2018-10-26 20:34:37,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:37" (3/3) ... [2018-10-26 20:34:37,515 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1_false-unreach-call.c.i [2018-10-26 20:34:37,522 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:34:37,529 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:34:37,543 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:34:37,574 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:34:37,574 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:34:37,574 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:34:37,574 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:34:37,575 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:34:37,575 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:34:37,575 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:34:37,575 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:34:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 20:34:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 20:34:37,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:34:37,603 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:34:37,605 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:34:37,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:34:37,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2018-10-26 20:34:37,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:34:37,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:34:37,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:34:37,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:34:37,656 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:34:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:34:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:34:37,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:34:37,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:34:37,717 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-26 20:34:37,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 20:34:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 20:34:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 20:34:37,736 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 20:34:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:34:37,755 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-26 20:34:37,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 20:34:37,757 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 20:34:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:34:37,764 INFO L225 Difference]: With dead ends: 32 [2018-10-26 20:34:37,764 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 20:34:37,768 INFO L605 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 [2018-10-26 20:34:37,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 20:34:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 20:34:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 20:34:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 20:34:37,800 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 20:34:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:34:37,800 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 20:34:37,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 20:34:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 20:34:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 20:34:37,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:34:37,802 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:34:37,802 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:34:37,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:34:37,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1142988599, now seen corresponding path program 1 times [2018-10-26 20:34:37,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:34:37,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:34:37,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:34:37,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:34:37,804 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:34:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:34:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:34:37,839 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:34:37,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:34:37 BoogieIcfgContainer [2018-10-26 20:34:37,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:34:37,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:34:37,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:34:37,857 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:34:37,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:37" (3/4) ... [2018-10-26 20:34:37,861 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 20:34:37,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:34:37,861 INFO L168 Benchmark]: Toolchain (without parser) took 937.62 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 963.4 MB in the beginning and 1.1 GB in the end (delta: -154.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:37,863 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:34:37,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 180.44 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:37,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.21 ms. Allocated memory is still 1.0 GB. Free memory is still 952.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:34:37,864 INFO L168 Benchmark]: Boogie Preprocessor took 19.44 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:37,865 INFO L168 Benchmark]: RCFGBuilder took 361.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -196.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:37,866 INFO L168 Benchmark]: TraceAbstraction took 346.64 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: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:37,866 INFO L168 Benchmark]: Witness Printer took 4.02 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. [2018-10-26 20:34:37,869 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 982.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 180.44 ms. Allocated memory is still 1.0 GB. Free memory was 963.4 MB in the beginning and 952.7 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 17.21 ms. Allocated memory is still 1.0 GB. Free memory is still 952.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.44 ms. Allocated memory is still 1.0 GB. Free memory was 952.7 MB in the beginning and 947.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 361.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -196.0 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 346.64 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: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.02 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: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: 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, 20 locations, 1 error locations. UNSAFE Result, 0.2s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 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=20occurred 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, 22 NumberOfCodeBlocks, 22 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 0.1.23-1dbac8b [2018-10-26 20:34:39,673 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:34:39,674 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:34:39,683 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:34:39,683 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:34:39,684 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:34:39,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:34:39,686 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:34:39,687 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:34:39,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:34:39,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:34:39,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:34:39,689 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:34:39,690 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:34:39,690 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:34:39,691 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:34:39,691 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:34:39,693 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:34:39,694 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:34:39,695 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:34:39,696 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:34:39,697 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:34:39,699 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:34:39,699 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:34:39,699 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:34:39,700 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:34:39,701 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:34:39,701 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:34:39,702 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:34:39,703 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:34:39,703 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:34:39,703 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:34:39,703 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:34:39,704 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:34:39,704 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:34:39,705 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:34:39,705 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-26 20:34:39,716 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:34:39,716 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:34:39,717 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:34:39,717 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 20:34:39,718 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 20:34:39,718 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 20:34:39,718 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 20:34:39,718 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 20:34:39,719 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:34:39,719 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:34:39,719 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:34:39,719 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:34:39,719 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:34:39,719 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:34:39,720 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:34:39,720 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:34:39,721 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:34:39,721 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:34:39,722 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 20:34:39,722 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:34:39,722 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 20:34:39,722 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 20:34:39,722 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_4fcbf133-80c2-4b70-b71b-6bc176539210/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 [2018-10-26 20:34:39,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:34:39,762 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:34:39,765 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:34:39,766 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:34:39,766 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:34:39,767 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-10-26 20:34:39,811 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/87e04877c/f4bd07f2122c47b5a694cfba168d57b6/FLAGa06805be1 [2018-10-26 20:34:40,156 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:34:40,157 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/sv-benchmarks/c/loop-floats-scientific-comp/loop1_false-unreach-call.c.i [2018-10-26 20:34:40,162 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/87e04877c/f4bd07f2122c47b5a694cfba168d57b6/FLAGa06805be1 [2018-10-26 20:34:40,172 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/data/87e04877c/f4bd07f2122c47b5a694cfba168d57b6 [2018-10-26 20:34:40,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:34:40,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:34:40,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:34:40,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:34:40,179 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:34:40,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2575ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40, skipping insertion in model container [2018-10-26 20:34:40,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:34:40,208 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:34:40,340 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:34:40,344 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:34:40,359 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:34:40,371 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:34:40,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40 WrapperNode [2018-10-26 20:34:40,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:34:40,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:34:40,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:34:40,373 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:34:40,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:34:40,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:34:40,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:34:40,393 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:34:40,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... [2018-10-26 20:34:40,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:34:40,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:34:40,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:34:40,416 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:34:40,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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 [2018-10-26 20:34:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:34:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:34:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:34:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:34:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:34:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:34:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 20:34:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 20:34:44,633 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:34:44,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:44 BoogieIcfgContainer [2018-10-26 20:34:44,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:34:44,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:34:44,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:34:44,637 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:34:44,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:34:40" (1/3) ... [2018-10-26 20:34:44,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d20ffde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:34:44, skipping insertion in model container [2018-10-26 20:34:44,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:34:40" (2/3) ... [2018-10-26 20:34:44,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d20ffde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:34:44, skipping insertion in model container [2018-10-26 20:34:44,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:44" (3/3) ... [2018-10-26 20:34:44,645 INFO L112 eAbstractionObserver]: Analyzing ICFG loop1_false-unreach-call.c.i [2018-10-26 20:34:44,661 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:34:44,667 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:34:44,681 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:34:44,705 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 20:34:44,706 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:34:44,706 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:34:44,706 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:34:44,706 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:34:44,707 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:34:44,707 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:34:44,707 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:34:44,707 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:34:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 20:34:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 20:34:44,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:34:44,728 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:34:44,730 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:34:44,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:34:44,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2018-10-26 20:34:44,739 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 20:34:44,739 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 20:34:44,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2018-10-26 20:34:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:34:44,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:34:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 20:34:45,004 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 20:34:45,016 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 20:34:45,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 20:34:45,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 20:34:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 20:34:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 20:34:45,029 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 20:34:45,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:34:45,043 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-10-26 20:34:45,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 20:34:45,045 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 20:34:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:34:45,053 INFO L225 Difference]: With dead ends: 32 [2018-10-26 20:34:45,053 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 20:34:45,056 INFO L605 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 [2018-10-26 20:34:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 20:34:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 20:34:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 20:34:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 20:34:45,086 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 20:34:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:34:45,086 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 20:34:45,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 20:34:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 20:34:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 20:34:45,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:34:45,087 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:34:45,088 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:34:45,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:34:45,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1142988599, now seen corresponding path program 1 times [2018-10-26 20:34:45,088 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 20:34:45,089 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/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 [2018-10-26 20:34:45,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:34:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:34:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:34:46,191 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:34:46,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:34:46 BoogieIcfgContainer [2018-10-26 20:34:46,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:34:46,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:34:46,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:34:46,215 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:34:46,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:34:44" (3/4) ... [2018-10-26 20:34:46,219 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 20:34:46,256 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4fcbf133-80c2-4b70-b71b-6bc176539210/bin-2019/utaipan/witness.graphml [2018-10-26 20:34:46,256 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:34:46,256 INFO L168 Benchmark]: Toolchain (without parser) took 6081.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -144.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,258 INFO L168 Benchmark]: CDTParser took 0.14 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. [2018-10-26 20:34:46,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 196.01 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 942.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,259 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.95 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:34:46,259 INFO L168 Benchmark]: Boogie Preprocessor took 22.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,259 INFO L168 Benchmark]: RCFGBuilder took 4218.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,260 INFO L168 Benchmark]: TraceAbstraction took 1580.31 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,260 INFO L168 Benchmark]: Witness Printer took 40.73 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:34:46,265 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 196.01 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 942.5 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 19.95 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.15 ms. Allocated memory is still 1.0 GB. Free memory was 942.5 MB in the beginning and 937.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 4218.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -197.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1580.31 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: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * Witness Printer took 40.73 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: 6.7 MB). Peak memory consumption was 6.7 MB. 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, 20 locations, 1 error locations. UNSAFE Result, 1.5s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 20 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=20occurred 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, 0.7s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 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...