./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c --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_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 1bbff5832e71471655f4416229b3fdd1dac2e479 ..................................................................................................................................................................................................................................................... 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_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 1bbff5832e71471655f4416229b3fdd1dac2e479 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:39:25,696 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:39:25,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:39:25,707 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:39:25,707 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:39:25,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:39:25,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:39:25,711 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:39:25,712 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:39:25,713 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:39:25,713 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:39:25,714 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:39:25,715 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:39:25,716 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:39:25,717 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:39:25,717 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:39:25,718 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:39:25,720 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:39:25,721 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:39:25,723 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:39:25,723 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:39:25,724 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:39:25,727 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:39:25,727 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:39:25,727 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:39:25,728 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:39:25,729 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:39:25,729 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:39:25,730 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:39:25,731 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:39:25,731 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:39:25,732 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:39:25,732 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:39:25,732 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:39:25,733 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:39:25,734 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:39:25,735 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 23:39:25,747 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:39:25,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:39:25,747 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:39:25,748 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 23:39:25,748 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 23:39:25,749 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:39:25,749 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:39:25,749 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:39:25,750 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:39:25,750 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:39:25,750 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:39:25,750 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:39:25,752 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:39:25,752 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:39:25,753 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:39:25,753 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 23:39:25,754 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:39:25,754 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:39:25,754 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 23:39:25,754 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_a0889a4d-d75e-4215-9ff5-54a70a118119/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 -> 1bbff5832e71471655f4416229b3fdd1dac2e479 [2018-10-26 23:39:25,783 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:39:25,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:39:25,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:39:25,798 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:39:25,799 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:39:25,799 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:25,840 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/42b163e17/3ee760cdb0ad4d1ca9f27ad2ffcc5989/FLAG6992104fa [2018-10-26 23:39:26,222 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:39:26,223 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:26,228 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/42b163e17/3ee760cdb0ad4d1ca9f27ad2ffcc5989/FLAG6992104fa [2018-10-26 23:39:26,242 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/42b163e17/3ee760cdb0ad4d1ca9f27ad2ffcc5989 [2018-10-26 23:39:26,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:39:26,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 23:39:26,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:39:26,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:39:26,250 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:39:26,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250b1434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26, skipping insertion in model container [2018-10-26 23:39:26,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:39:26,280 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:39:26,395 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:39:26,400 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:39:26,412 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:39:26,422 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:39:26,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26 WrapperNode [2018-10-26 23:39:26,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:39:26,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:39:26,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:39:26,423 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:39:26,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:39:26,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:39:26,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:39:26,440 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:39:26,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... [2018-10-26 23:39:26,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:39:26,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:39:26,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:39:26,456 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:39:26,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 23:39:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:39:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:39:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:39:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:39:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:39:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:39:26,747 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:39:26,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:26 BoogieIcfgContainer [2018-10-26 23:39:26,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:39:26,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:39:26,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:39:26,751 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:39:26,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:39:26" (1/3) ... [2018-10-26 23:39:26,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dca749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:26, skipping insertion in model container [2018-10-26 23:39:26,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:26" (2/3) ... [2018-10-26 23:39:26,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dca749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:26, skipping insertion in model container [2018-10-26 23:39:26,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:26" (3/3) ... [2018-10-26 23:39:26,754 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:26,762 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:39:26,769 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:39:26,782 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:39:26,809 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:39:26,809 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:39:26,809 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:39:26,809 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:39:26,809 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:39:26,809 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:39:26,809 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:39:26,809 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:39:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-26 23:39:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 23:39:26,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:39:26,829 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:39:26,831 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:39:26,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:39:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-10-26 23:39:26,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 23:39:26,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:39:26,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:39:26,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:39:26,874 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 23:39:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:39:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:39:26,919 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 23:39:26,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:39:26 BoogieIcfgContainer [2018-10-26 23:39:26,938 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:39:26,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:39:26,939 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:39:26,939 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:39:26,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:26" (3/4) ... [2018-10-26 23:39:26,944 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 23:39:26,944 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:39:26,945 INFO L168 Benchmark]: Toolchain (without parser) took 699.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.1 MB). Free memory was 960.7 MB in the beginning and 1.1 GB in the end (delta: -181.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:39:26,946 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:39:26,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. [2018-10-26 23:39:26,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.57 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:39:26,948 INFO L168 Benchmark]: Boogie Preprocessor took 15.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.8 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:39:26,949 INFO L168 Benchmark]: RCFGBuilder took 292.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.1 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -208.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2018-10-26 23:39:26,949 INFO L168 Benchmark]: TraceAbstraction took 190.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-10-26 23:39:26,950 INFO L168 Benchmark]: Witness Printer took 5.53 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 23:39:26,953 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 176.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.7 MB in the beginning and 948.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.57 ms. Allocated memory is still 1.0 GB. Free memory is still 948.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.35 ms. Allocated memory is still 1.0 GB. Free memory was 948.8 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 292.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.1 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -208.3 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 190.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Witness Printer took 5.53 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: 25]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 10, overapproximation of someBinaryArithmeticDOUBLEoperation at line 8. Possible FailurePath: [L1] int __return_main; VAL [\old(__return_main)=2, __return_main=0] [L7] double main__x = 1.0; [L8] double main__x1 = main__x / 2.5; VAL [__return_main=0, main__x=1] [L10] COND FALSE !(main__x1 != main__x) [L19] int __tmp_1; [L20] __tmp_1 = main__x == 0 [L21] int __VERIFIER_assert__cond; [L22] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L23] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] [L25] __VERIFIER_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 23:39:28,787 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:39:28,788 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:39:28,797 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:39:28,798 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:39:28,798 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:39:28,799 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:39:28,800 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:39:28,802 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:39:28,802 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:39:28,803 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:39:28,803 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:39:28,804 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:39:28,804 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:39:28,805 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:39:28,806 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:39:28,806 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:39:28,807 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:39:28,809 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:39:28,810 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:39:28,811 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:39:28,811 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:39:28,813 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:39:28,813 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:39:28,813 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:39:28,814 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:39:28,818 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:39:28,819 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:39:28,820 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:39:28,820 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:39:28,820 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:39:28,821 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:39:28,821 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:39:28,821 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:39:28,822 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:39:28,827 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:39:28,827 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-10-26 23:39:28,843 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:39:28,846 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:39:28,847 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:39:28,847 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 23:39:28,847 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 23:39:28,847 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 23:39:28,847 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 23:39:28,848 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 23:39:28,848 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:39:28,848 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:39:28,848 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:39:28,848 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:39:28,848 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:39:28,849 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:39:28,850 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:39:28,850 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:39:28,850 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:39:28,850 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:39:28,852 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:39:28,853 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:39:28,853 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:39:28,853 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:39:28,854 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-10-26 23:39:28,854 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:39:28,854 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 23:39:28,854 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 23:39:28,854 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_a0889a4d-d75e-4215-9ff5-54a70a118119/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 -> 1bbff5832e71471655f4416229b3fdd1dac2e479 [2018-10-26 23:39:28,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:39:28,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:39:28,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:39:28,904 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:39:28,904 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:39:28,904 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:28,943 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/d06dee298/e1c7ba7eb92c40ec942e228bf1e823f5/FLAG0998b063d [2018-10-26 23:39:29,330 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:39:29,331 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/sv-benchmarks/c/floats-esbmc-regression/Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:29,337 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/d06dee298/e1c7ba7eb92c40ec942e228bf1e823f5/FLAG0998b063d [2018-10-26 23:39:29,349 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/data/d06dee298/e1c7ba7eb92c40ec942e228bf1e823f5 [2018-10-26 23:39:29,353 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:39:29,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 23:39:29,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:39:29,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:39:29,363 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:39:29,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcac331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29, skipping insertion in model container [2018-10-26 23:39:29,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:39:29,395 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:39:29,541 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:39:29,547 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:39:29,560 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:39:29,576 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:39:29,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29 WrapperNode [2018-10-26 23:39:29,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:39:29,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 23:39:29,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 23:39:29,578 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 23:39:29,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 23:39:29,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:39:29,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:39:29,601 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:39:29,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... [2018-10-26 23:39:29,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:39:29,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:39:29,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:39:29,622 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:39:29,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 23:39:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:39:29,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:39:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:39:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:39:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:39:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:39:30,601 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:39:30,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:30 BoogieIcfgContainer [2018-10-26 23:39:30,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:39:30,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:39:30,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:39:30,604 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:39:30,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:39:29" (1/3) ... [2018-10-26 23:39:30,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea09b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:30, skipping insertion in model container [2018-10-26 23:39:30,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:39:29" (2/3) ... [2018-10-26 23:39:30,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea09b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:39:30, skipping insertion in model container [2018-10-26 23:39:30,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:39:30" (3/3) ... [2018-10-26 23:39:30,610 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_true-unreach-call.i.p+cfa-reducer.c [2018-10-26 23:39:30,618 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:39:30,624 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:39:30,633 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:39:30,654 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:39:30,654 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:39:30,654 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:39:30,654 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:39:30,655 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:39:30,655 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:39:30,655 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:39:30,655 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:39:30,655 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:39:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-26 23:39:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-26 23:39:30,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:39:30,675 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:39:30,677 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:39:30,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:39:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2018-10-26 23:39:30,685 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:39:30,686 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 [2018-10-26 23:39:30,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:39:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:39:30,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:39:33,542 WARN L179 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 23:39:33,550 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 23:39:33,551 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 23:39:33,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:39:33,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:39:33,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:39:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:39:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:39:33,589 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2018-10-26 23:39:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:39:35,276 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-26 23:39:36,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:39:36,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-26 23:39:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:39:36,039 INFO L225 Difference]: With dead ends: 22 [2018-10-26 23:39:36,039 INFO L226 Difference]: Without dead ends: 11 [2018-10-26 23:39:36,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:39:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-26 23:39:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-26 23:39:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-26 23:39:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-26 23:39:36,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-26 23:39:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:39:36,078 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-26 23:39:36,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:39:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-26 23:39:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 23:39:36,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:39:36,079 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:39:36,079 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:39:36,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:39:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2018-10-26 23:39:36,080 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:39:36,080 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/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 23:39:36,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:39:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:39:36,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:39:40,098 WARN L179 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 23:39:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:39:40,101 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:39:44,208 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~main__x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~main__x1~0)) is different from false [2018-10-26 23:39:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2018-10-26 23:39:44,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:39:44,735 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:39:44,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:39:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-10-26 23:39:58,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:39:58,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-26 23:39:58,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:39:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:39:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=12, Unknown=2, NotChecked=6, Total=30 [2018-10-26 23:39:58,147 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-26 23:40:00,402 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) c_main_~main__x1~0) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)) (not (fp.eq (fp.div RNE c_main_~main__x1~0 .cse0) c_main_~main__x1~0)))) is different from true [2018-10-26 23:40:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:40:06,887 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2018-10-26 23:40:06,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:40:06,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-26 23:40:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:40:06,889 INFO L225 Difference]: With dead ends: 16 [2018-10-26 23:40:06,889 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 23:40:06,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=12, Invalid=13, Unknown=3, NotChecked=14, Total=42 [2018-10-26 23:40:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 23:40:06,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 23:40:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 23:40:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 23:40:06,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 23:40:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:40:06,894 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 23:40:06,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:40:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 23:40:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 23:40:06,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:40:06,895 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:40:06,895 INFO L424 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:40:06,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:40:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 2 times [2018-10-26 23:40:06,896 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:40:06,896 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2018-10-26 23:40:06,910 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 23:40:07,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:40:07,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:40:07,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:40:10,146 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (and (= c_main_~main__x1~0 (fp.div RNE c_main_~main__x~0 .cse0)) (= (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) c_main_~main__x~0))) is different from true [2018-10-26 23:40:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2018-10-26 23:40:10,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:40:38,591 WARN L179 SmtUtils]: Spent 11.45 s on a formula simplification that was a NOOP. DAG size: 11 [2018-10-26 23:40:43,194 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-10-26 23:40:45,751 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~main__x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from false [2018-10-26 23:40:48,322 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~main__x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))))) is different from true [2018-10-26 23:40:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 5 not checked. [2018-10-26 23:40:48,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:40:48,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:40:48,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:40:58,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:40:58,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:40:59,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:41:09,770 WARN L179 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:41:14,458 WARN L179 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-10-26 23:41:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:41:14,468 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:41:17,964 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq c_main_~main__x1~0 c_main_~main__x~0) (not (fp.eq (fp.div RNE c_main_~main__x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~main__x1~0))) is different from true [2018-10-26 23:41:20,382 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 c_main_~main__x1~0) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-10-26 23:41:22,784 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE c_main_~main__x1~0 .cse1))) (or (fp.eq .cse0 c_main_~main__x1~0) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-10-26 23:41:25,386 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE c_main_~main__x1~0 .cse1))) (let ((.cse0 (fp.div RNE .cse2 .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))))))) is different from false [2018-10-26 23:41:27,978 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE c_main_~main__x1~0 .cse1))) (let ((.cse0 (fp.div RNE .cse2 .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2) (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))))))) is different from true [2018-10-26 23:41:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2018-10-26 23:41:28,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-10-26 23:41:28,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 16 [2018-10-26 23:41:28,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 23:41:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 23:41:28,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=64, Unknown=13, NotChecked=126, Total=240 [2018-10-26 23:41:28,140 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-10-26 23:41:30,747 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse3 (fp.div RNE c_main_~main__x1~0 .cse0))) (let ((.cse5 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse2 (fp.div RNE .cse3 .cse0))) (let ((.cse1 (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2))) (.cse4 (fp.eq .cse2 .cse5))) (and (= (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) c_main_~main__x1~0) (or .cse1 (fp.eq .cse2 .cse3) .cse4) (or .cse1 .cse4) (or (fp.eq c_main_~main__x~0 .cse5) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0)))))))) is different from true [2018-10-26 23:41:33,214 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse4 (fp.div RNE c_main_~main__x1~0 .cse0)) (.cse1 ((_ to_fp 11 53) RNE (_ bv0 32)))) (let ((.cse2 (fp.eq .cse4 .cse1)) (.cse3 (not (fp.eq (fp.div RNE .cse4 .cse0) .cse4)))) (and (= c_main_~main__x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (or (fp.eq c_main_~main__x~0 .cse1) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0))) (or .cse2 .cse3) (or (fp.eq .cse4 c_main_~main__x1~0) .cse2 .cse3))))) is different from true [2018-10-26 23:41:51,342 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (not (= c_main_~__VERIFIER_assert__cond~0 (_ bv0 32))) (or (fp.eq c_main_~main__x1~0 .cse0) (not (fp.eq (fp.div RNE c_main_~main__x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~main__x1~0))) (or (fp.eq c_main_~main__x~0 .cse0) (not (fp.eq c_main_~main__x1~0 c_main_~main__x~0))))) is different from true [2018-10-26 23:41:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:41:54,506 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2018-10-26 23:41:54,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:41:54,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-10-26 23:41:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:41:54,509 INFO L225 Difference]: With dead ends: 19 [2018-10-26 23:41:54,509 INFO L226 Difference]: Without dead ends: 15 [2018-10-26 23:41:54,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.8s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=16, NotChecked=216, Total=342 [2018-10-26 23:41:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-26 23:41:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-26 23:41:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 23:41:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 23:41:54,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-26 23:41:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:41:54,516 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 23:41:54,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 23:41:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 23:41:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 23:41:54,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:41:54,517 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:41:54,517 INFO L424 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:41:54,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:41:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 3 times [2018-10-26 23:41:54,518 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:41:54,518 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2018-10-26 23:41:54,522 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-10-26 23:41:55,472 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-26 23:41:55,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:41:55,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:41:58,570 WARN L854 $PredicateComparison]: unable to prove that (= c_main_~main__x1~0 (fp.div RNE c_main_~main__x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) is different from true [2018-10-26 23:42:01,006 WARN L832 $PredicateComparison]: unable to prove that (and (exists ((v_main_~main__x~0_16 (_ FloatingPoint 11 53))) (and (= c_main_~main__x~0 (fp.div RNE v_main_~main__x~0_16 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~main__x~0 v_main_~main__x~0_16)))) (= c_main_~main__x1~0 (fp.div RNE c_main_~main__x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from false [2018-10-26 23:42:03,217 WARN L854 $PredicateComparison]: unable to prove that (and (exists ((v_main_~main__x~0_16 (_ FloatingPoint 11 53))) (and (= c_main_~main__x~0 (fp.div RNE v_main_~main__x~0_16 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (not (fp.eq c_main_~main__x~0 v_main_~main__x~0_16)))) (= c_main_~main__x1~0 (fp.div RNE c_main_~main__x~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))))) is different from true [2018-10-26 23:42:15,785 WARN L832 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~main__x~0_16 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~main__x~0_16 .cse1))) (and (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0) (not (fp.eq .cse0 v_main_~main__x~0_16)))))) (= (bvadd c_main_~__VERIFIER_assert__cond~0 (_ bv4294967295 32)) (_ bv0 32))) (and (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse3 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse2 (fp.div RNE v_prenex_1 .cse3))) (and (not (fp.eq .cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))) (not (fp.eq .cse2 v_prenex_1)) (fp.eq (fp.div RNE .cse2 .cse3) .cse2))))) (= c_main_~__VERIFIER_assert__cond~0 (_ bv0 32)))) is different from false [2018-10-26 23:42:23,016 WARN L832 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_1 .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (not (fp.eq .cse0 v_prenex_1)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from false [2018-10-26 23:42:25,402 WARN L854 $PredicateComparison]: unable to prove that (exists ((v_prenex_1 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_prenex_1 .cse1))) (and (not (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32)))) (not (fp.eq .cse0 v_prenex_1)) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))))) is different from true [2018-10-26 23:42:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2018-10-26 23:42:25,404 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:42:29,164 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~main__x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq c_main_~main__x1~0 c_main_~main__x~0) (not (fp.eq (fp.div RNE c_main_~main__x1~0 ((_ to_fp 11 53) RNE (/ 5.0 2.0))) c_main_~main__x1~0))) is different from true [2018-10-26 23:42:36,309 WARN L832 $PredicateComparison]: unable to prove that (forall ((v_main_~main__x~0_18 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~main__x~0_18 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~main__x~0_18) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from false [2018-10-26 23:42:38,708 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_main_~main__x~0_18 (_ FloatingPoint 11 53))) (let ((.cse1 ((_ to_fp 11 53) RNE (/ 5.0 2.0)))) (let ((.cse0 (fp.div RNE v_main_~main__x~0_18 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (fp.eq .cse0 v_main_~main__x~0_18) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))))) is different from true [2018-10-26 23:43:07,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:43:07,929 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a0889a4d-d75e-4215-9ff5-54a70a118119/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:43:07,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:43:42,138 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 23:43:42,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-10-26 23:43:43,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-26 23:43:43,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-26 23:43:43,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:43:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:43:43,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=10, Unknown=9, NotChecked=54, Total=90 [2018-10-26 23:43:43,944 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2018-10-26 23:43:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:43:43,948 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-26 23:43:43,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:43:43,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-10-26 23:43:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:43:43,949 INFO L225 Difference]: With dead ends: 15 [2018-10-26 23:43:43,949 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 23:43:43,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=17, Invalid=10, Unknown=9, NotChecked=54, Total=90 [2018-10-26 23:43:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 23:43:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 23:43:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 23:43:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 23:43:43,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2018-10-26 23:43:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:43:43,952 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 23:43:43,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:43:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 23:43:43,953 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 23:43:43,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 23:44:28,277 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:626) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:187) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-10-26 23:44:28,279 INFO L168 Benchmark]: Toolchain (without parser) took 298923.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 954.6 MB in the beginning and 1.0 GB in the end (delta: -89.0 MB). Peak memory consumption was 91.8 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:28,280 INFO L168 Benchmark]: CDTParser took 0.17 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 23:44:28,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.12 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 23:44:28,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.71 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 23:44:28,281 INFO L168 Benchmark]: Boogie Preprocessor took 21.14 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 23:44:28,282 INFO L168 Benchmark]: RCFGBuilder took 979.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 937.1 MB in the beginning and 1.2 GB in the end (delta: -226.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:28,290 INFO L168 Benchmark]: TraceAbstraction took 297676.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 119.9 MB). Peak memory consumption was 119.9 MB. Max. memory is 11.5 GB. [2018-10-26 23:44:28,293 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 219.12 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 22.71 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 21.14 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 979.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.9 MB). Free memory was 937.1 MB in the beginning and 1.2 GB in the end (delta: -226.4 MB). Peak memory consumption was 21.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 297676.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 119.9 MB). Peak memory consumption was 119.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...