./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 1d363a30f559764c47bcb73d637f2d7196a1b97b ..................................................................................................................................................................................................................................................................................... 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_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 1d363a30f559764c47bcb73d637f2d7196a1b97b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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. stderr output: (error "out of memory") --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:16:38,479 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:16:38,480 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:16:38,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:16:38,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:16:38,487 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:16:38,488 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:16:38,489 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:16:38,491 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:16:38,491 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:16:38,492 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:16:38,492 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:16:38,493 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:16:38,493 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:16:38,494 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:16:38,494 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:16:38,494 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:16:38,495 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:16:38,496 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:16:38,498 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:16:38,498 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:16:38,499 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:16:38,501 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:16:38,501 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:16:38,501 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:16:38,502 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:16:38,502 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:16:38,503 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:16:38,503 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:16:38,504 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:16:38,504 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:16:38,505 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:16:38,505 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:16:38,505 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:16:38,506 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:16:38,506 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:16:38,506 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-10 06:16:38,514 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:16:38,514 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:16:38,515 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:16:38,515 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:16:38,515 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:16:38,515 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:16:38,515 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-10 06:16:38,515 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:16:38,515 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-10 06:16:38,516 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-10 06:16:38,516 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:16:38,516 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:16:38,516 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:16:38,517 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:16:38,518 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:16:38,518 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:16:38,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:16:38,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:16:38,518 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:16:38,518 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:16:38,518 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-10 06:16:38,519 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-10 06:16:38,519 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_9645171a-b8b7-4b0e-a386-de1c709ba931/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-11-10 06:16:38,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:16:38,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:16:38,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:16:38,554 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:16:38,555 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:16:38,555 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 06:16:38,593 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/c6d6e6c90/701f0cccbf2740c3960232cbba231c08/FLAGa91596ac3 [2018-11-10 06:16:38,981 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:16:38,981 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 06:16:38,985 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/c6d6e6c90/701f0cccbf2740c3960232cbba231c08/FLAGa91596ac3 [2018-11-10 06:16:38,996 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/c6d6e6c90/701f0cccbf2740c3960232cbba231c08 [2018-11-10 06:16:38,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:16:38,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:16:39,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:16:39,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:16:39,003 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:16:39,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:16:38" (1/1) ... [2018-11-10 06:16:39,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb581ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39, skipping insertion in model container [2018-11-10 06:16:39,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:16:38" (1/1) ... [2018-11-10 06:16:39,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:16:39,021 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:16:39,109 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:16:39,112 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:16:39,122 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:16:39,130 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:16:39,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39 WrapperNode [2018-11-10 06:16:39,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:16:39,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:16:39,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:16:39,130 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:16:39,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:16:39,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:16:39,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:16:39,147 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:16:39,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... [2018-11-10 06:16:39,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:16:39,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:16:39,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:16:39,164 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:16:39,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 [2018-11-10 06:16:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:16:39,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:16:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:16:39,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:16:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:16:39,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:16:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 06:16:39,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 06:16:39,342 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:16:39,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:16:39 BoogieIcfgContainer [2018-11-10 06:16:39,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:16:39,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:16:39,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:16:39,345 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:16:39,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:16:38" (1/3) ... [2018-11-10 06:16:39,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b85a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:16:39, skipping insertion in model container [2018-11-10 06:16:39,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:39" (2/3) ... [2018-11-10 06:16:39,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668b85a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:16:39, skipping insertion in model container [2018-11-10 06:16:39,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:16:39" (3/3) ... [2018-11-10 06:16:39,348 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-11-10 06:16:39,354 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:16:39,359 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:16:39,369 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:16:39,390 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:16:39,390 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:16:39,390 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:16:39,390 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:16:39,390 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:16:39,390 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:16:39,390 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:16:39,390 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:16:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 06:16:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 06:16:39,405 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:16:39,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:16:39,408 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:16:39,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:16:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 06:16:39,413 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:16:39,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:16:39,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:16:39,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:16:39,443 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:16:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:16:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:16:39,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:16:39,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 06:16:39,482 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-10 06:16:39,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 06:16:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 06:16:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:16:39,494 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 06:16:39,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:16:39,509 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 06:16:39,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 06:16:39,510 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 06:16:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:16:39,515 INFO L225 Difference]: With dead ends: 31 [2018-11-10 06:16:39,515 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 06:16:39,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:16:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 06:16:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 06:16:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 06:16:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 06:16:39,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 06:16:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:16:39,542 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 06:16:39,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 06:16:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 06:16:39,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 06:16:39,542 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:16:39,542 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:16:39,543 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:16:39,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:16:39,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 06:16:39,543 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-10 06:16:39,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:16:39,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:16:39,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 06:16:39,544 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-10 06:16:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:16:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 06:16:39,565 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-10 06:16:39,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 06:16:39 BoogieIcfgContainer [2018-11-10 06:16:39,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-10 06:16:39,581 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 06:16:39,581 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 06:16:39,581 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 06:16:39,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:16:39" (3/4) ... [2018-11-10 06:16:39,584 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 06:16:39,584 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 06:16:39,585 INFO L168 Benchmark]: Toolchain (without parser) took 586.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 960.3 MB in the beginning and 1.1 GB in the end (delta: -156.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:16:39,586 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:16:39,586 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.45 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:16:39,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.26 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:16:39,587 INFO L168 Benchmark]: Boogie Preprocessor took 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:16:39,587 INFO L168 Benchmark]: RCFGBuilder took 178.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2018-11-10 06:16:39,588 INFO L168 Benchmark]: TraceAbstraction took 237.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2018-11-10 06:16:39,588 INFO L168 Benchmark]: Witness Printer took 3.34 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. [2018-11-10 06:16:39,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.45 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.26 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.69 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 237.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * Witness Printer took 3.34 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: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12, overapproximation of someBinaryArithmeticDOUBLEoperation at line 10. Possible FailurePath: [L9] double x = 1.0; [L10] double x1 = x/1.6; VAL [x=1] [L12] COND FALSE !(x1 != x) VAL [x=1] [L18] CALL __VERIFIER_assert(x == 0) VAL [\old(cond)=0] [L2] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L2] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-11-10 06:16:40,993 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 06:16:40,994 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 06:16:41,002 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 06:16:41,002 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 06:16:41,003 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 06:16:41,004 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 06:16:41,005 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 06:16:41,006 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 06:16:41,007 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 06:16:41,007 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 06:16:41,007 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 06:16:41,008 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 06:16:41,009 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 06:16:41,010 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 06:16:41,010 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 06:16:41,011 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 06:16:41,012 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 06:16:41,013 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 06:16:41,015 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 06:16:41,015 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 06:16:41,016 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 06:16:41,018 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 06:16:41,018 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 06:16:41,018 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 06:16:41,019 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 06:16:41,019 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 06:16:41,020 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 06:16:41,021 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 06:16:41,021 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 06:16:41,021 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 06:16:41,022 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 06:16:41,022 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 06:16:41,022 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 06:16:41,023 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 06:16:41,023 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 06:16:41,024 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-10 06:16:41,034 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 06:16:41,034 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 06:16:41,035 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-10 06:16:41,035 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-10 06:16:41,035 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-10 06:16:41,035 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-10 06:16:41,036 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-10 06:16:41,036 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-10 06:16:41,036 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 06:16:41,036 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-10 06:16:41,037 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 06:16:41,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-10 06:16:41,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 06:16:41,038 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 06:16:41,038 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-10 06:16:41,038 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-10 06:16:41,038 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-10 06:16:41,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-10 06:16:41,039 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-10 06:16:41,040 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_9645171a-b8b7-4b0e-a386-de1c709ba931/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 -> 1d363a30f559764c47bcb73d637f2d7196a1b97b [2018-11-10 06:16:41,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 06:16:41,075 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 06:16:41,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 06:16:41,078 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 06:16:41,078 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 06:16:41,078 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/../../sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 06:16:41,114 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/5a581474f/dfaa46afdbcc4dd292d4d053b0dd9c8d/FLAG0c220d29d [2018-11-10 06:16:41,504 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 06:16:41,505 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/sv-benchmarks/c/floats-esbmc-regression/Double_div_bad_false-unreach-call.i [2018-11-10 06:16:41,508 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/5a581474f/dfaa46afdbcc4dd292d4d053b0dd9c8d/FLAG0c220d29d [2018-11-10 06:16:41,517 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/data/5a581474f/dfaa46afdbcc4dd292d4d053b0dd9c8d [2018-11-10 06:16:41,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 06:16:41,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 06:16:41,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 06:16:41,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 06:16:41,524 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 06:16:41,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b1e68f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41, skipping insertion in model container [2018-11-10 06:16:41,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 06:16:41,547 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 06:16:41,672 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:16:41,677 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 06:16:41,686 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 06:16:41,695 INFO L193 MainTranslator]: Completed translation [2018-11-10 06:16:41,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41 WrapperNode [2018-11-10 06:16:41,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 06:16:41,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 06:16:41,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 06:16:41,696 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 06:16:41,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 06:16:41,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 06:16:41,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 06:16:41,709 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 06:16:41,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... [2018-11-10 06:16:41,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 06:16:41,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 06:16:41,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 06:16:41,724 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 06:16:41,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 [2018-11-10 06:16:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-10 06:16:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-10 06:16:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 06:16:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 06:16:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-10 06:16:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-10 06:16:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-10 06:16:41,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-10 06:16:42,620 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 06:16:42,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:16:42 BoogieIcfgContainer [2018-11-10 06:16:42,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 06:16:42,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-10 06:16:42,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-10 06:16:42,623 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-10 06:16:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:16:41" (1/3) ... [2018-11-10 06:16:42,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc9525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:16:42, skipping insertion in model container [2018-11-10 06:16:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:16:41" (2/3) ... [2018-11-10 06:16:42,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dc9525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:16:42, skipping insertion in model container [2018-11-10 06:16:42,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 06:16:42" (3/3) ... [2018-11-10 06:16:42,625 INFO L112 eAbstractionObserver]: Analyzing ICFG Double_div_bad_false-unreach-call.i [2018-11-10 06:16:42,631 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-10 06:16:42,635 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-10 06:16:42,644 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-10 06:16:42,663 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 06:16:42,663 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-10 06:16:42,663 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-10 06:16:42,663 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-10 06:16:42,664 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 06:16:42,664 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 06:16:42,664 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-10 06:16:42,664 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 06:16:42,664 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-10 06:16:42,675 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-10 06:16:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-10 06:16:42,679 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:16:42,680 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:16:42,682 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:16:42,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:16:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-11-10 06:16:42,688 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:16:42,689 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 [2018-11-10 06:16:42,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:16:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:16:42,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:16:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:16:42,944 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:16:42,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:16:42,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-10 06:16:42,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-10 06:16:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-10 06:16:42,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:16:42,966 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-10 06:16:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:16:42,981 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-10 06:16:42,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 06:16:42,982 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-10 06:16:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:16:42,987 INFO L225 Difference]: With dead ends: 31 [2018-11-10 06:16:42,987 INFO L226 Difference]: Without dead ends: 12 [2018-11-10 06:16:42,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-10 06:16:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-10 06:16:43,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-10 06:16:43,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-10 06:16:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-10 06:16:43,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-10 06:16:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:16:43,018 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-10 06:16:43,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-10 06:16:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-10 06:16:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-10 06:16:43,018 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:16:43,018 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:16:43,018 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:16:43,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:16:43,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-11-10 06:16:43,019 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:16:43,019 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/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 [2018-11-10 06:16:43,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:16:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:16:43,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:16:44,461 WARN L179 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 11 [2018-11-10 06:16:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:16:44,467 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-10 06:16:44,476 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 06:16:44,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-10 06:16:44,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-10 06:16:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-10 06:16:44,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 06:16:44,478 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-11-10 06:16:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:16:46,395 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-10 06:16:47,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-10 06:16:47,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-10 06:16:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:16:47,020 INFO L225 Difference]: With dead ends: 19 [2018-11-10 06:16:47,020 INFO L226 Difference]: Without dead ends: 14 [2018-11-10 06:16:47,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-10 06:16:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-10 06:16:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-10 06:16:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-10 06:16:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-10 06:16:47,023 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-11-10 06:16:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:16:47,023 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-10 06:16:47,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-10 06:16:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-10 06:16:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-10 06:16:47,024 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:16:47,024 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:16:47,024 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:16:47,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:16:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-11-10 06:16:47,025 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:16:47,025 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2018-11-10 06:16:47,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:16:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 06:16:47,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:16:51,436 WARN L179 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 12 [2018-11-10 06:16:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:16:51,439 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:17:04,533 WARN L179 SmtUtils]: Spent 2.73 s on a formula simplification that was a NOOP. DAG size: 7 [2018-11-10 06:17:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:17:04,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:17:04,553 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:17:04,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 06:17:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-10 06:17:18,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:17:18,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-10 06:17:18,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-10 06:17:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 06:17:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-10 06:17:18,002 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-11-10 06:17:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:17:31,485 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2018-11-10 06:17:31,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 06:17:31,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-11-10 06:17:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:17:31,691 INFO L225 Difference]: With dead ends: 23 [2018-11-10 06:17:31,691 INFO L226 Difference]: Without dead ends: 18 [2018-11-10 06:17:31,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2018-11-10 06:17:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-10 06:17:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-10 06:17:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 06:17:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-10 06:17:31,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2018-11-10 06:17:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:17:31,695 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-10 06:17:31,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-10 06:17:31,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-10 06:17:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-10 06:17:31,696 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:17:31,696 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:17:31,696 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:17:31,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:17:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 2 times [2018-11-10 06:17:31,697 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:17:31,697 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-11-10 06:17:31,700 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-10 06:17:32,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:17:32,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:17:32,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:17:38,840 WARN L179 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 14 [2018-11-10 06:17:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:17:38,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:17:47,467 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from false [2018-11-10 06:17:49,664 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from true [2018-11-10 06:17:52,071 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_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 false [2018-11-10 06:17:54,471 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_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 [2018-11-10 06:17:57,049 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_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 [2018-11-10 06:17:59,623 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_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 [2018-11-10 06:17:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2018-11-10 06:17:59,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:17:59,658 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:17:59,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 06:18:15,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 06:18:15,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [2018-11-10 06:18:18,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:18:18,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2018-11-10 06:18:18,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-10 06:18:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-10 06:18:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=71, Unknown=6, NotChecked=54, Total=156 [2018-11-10 06:18:18,129 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 13 states. [2018-11-10 06:18:20,729 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) (.cse2 ((_ to_fp 11 53) RNE (_ bv0 32)))) (and (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (or (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)) (fp.eq .cse0 .cse2))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (or (fp.eq c_main_~x~0 .cse2) (not (fp.eq c_main_~x1~0 c_main_~x~0))))) is different from true [2018-11-10 06:18:23,155 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (or (fp.eq .cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse1 .cse0) .cse1)))))) is different from true [2018-11-10 06:18:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:18:33,623 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-11-10 06:18:33,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:18:33,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-11-10 06:18:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:18:33,623 INFO L225 Difference]: With dead ends: 30 [2018-11-10 06:18:33,623 INFO L226 Difference]: Without dead ends: 22 [2018-11-10 06:18:33,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=33, Invalid=89, Unknown=8, NotChecked=110, Total=240 [2018-11-10 06:18:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-10 06:18:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-10 06:18:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 06:18:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-11-10 06:18:33,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 17 [2018-11-10 06:18:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:18:33,628 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-11-10 06:18:33,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-10 06:18:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-11-10 06:18:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-10 06:18:33,629 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:18:33,629 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:18:33,629 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:18:33,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:18:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 3 times [2018-11-10 06:18:33,630 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:18:33,630 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2018-11-10 06:18:33,633 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-10 06:18:35,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 06:18:35,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:18:35,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:18:39,180 WARN L179 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 16 [2018-11-10 06:18:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:18:39,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:18:41,481 WARN L832 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from false [2018-11-10 06:18:43,681 WARN L854 $PredicateComparison]: unable to prove that (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0))) is different from true [2018-11-10 06:18:48,343 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_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 [2018-11-10 06:18:50,946 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_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 [2018-11-10 06:18:53,563 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_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 [2018-11-10 06:18:56,335 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .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 [2018-11-10 06:18:59,123 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .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 [2018-11-10 06:19:02,110 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .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 [2018-11-10 06:19:05,085 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .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 [2018-11-10 06:19:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2018-11-10 06:19:05,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:19:05,139 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:19:05,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 06:19:59,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-10 06:19:59,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Forcibly destroying the process [2018-11-10 06:20:01,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:20:01,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2018-11-10 06:20:01,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-10 06:20:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-10 06:20:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=110, Unknown=9, NotChecked=120, Total=272 [2018-11-10 06:20:01,257 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 17 states. [2018-11-10 06:20:04,391 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (_ bv0 32))) (.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0)) (or (fp.eq c_main_~x~0 .cse1) (not (fp.eq c_main_~x1~0 c_main_~x~0))) (let ((.cse2 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse2 .cse0) .cse2)) (fp.eq .cse2 .cse1))))) is different from true [2018-11-10 06:20:07,292 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (let ((.cse1 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0))) (or (not (fp.eq (fp.div RNE .cse1 .cse0) .cse1)) (fp.eq .cse1 ((_ to_fp 11 53) RNE (_ bv0 32))))))) is different from true [2018-11-10 06:20:09,972 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div RNE (fp.div RNE c_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))))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 06:20:12,434 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (or (fp.eq .cse0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 06:20:14,664 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (or (fp.eq c_main_~x1~0 ((_ to_fp 11 53) RNE (_ bv0 32))) (not (fp.eq (fp.div RNE c_main_~x1~0 .cse0) c_main_~x1~0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0)))) is different from true [2018-11-10 06:20:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:20:20,726 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-10 06:20:20,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 06:20:20,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-11-10 06:20:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:20:20,727 INFO L225 Difference]: With dead ends: 34 [2018-11-10 06:20:20,727 INFO L226 Difference]: Without dead ends: 26 [2018-11-10 06:20:20,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=14, NotChecked=310, Total=506 [2018-11-10 06:20:20,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-10 06:20:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-10 06:20:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-10 06:20:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-11-10 06:20:20,733 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 21 [2018-11-10 06:20:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:20:20,734 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-11-10 06:20:20,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-10 06:20:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-11-10 06:20:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-10 06:20:20,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:20:20,735 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:20:20,735 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:20:20,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:20:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1788298717, now seen corresponding path program 4 times [2018-11-10 06:20:20,736 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:20:20,736 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2018-11-10 06:20:20,743 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:20:22,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:20:22,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:20:22,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:20:37,151 WARN L179 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 18 [2018-11-10 06:20:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 06:20:37,155 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:20:41,302 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0)) is different from false [2018-11-10 06:20:44,421 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:20:46,844 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:20:49,515 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:20:52,214 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:20:55,120 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:20:58,004 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:21:01,130 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:21:04,255 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:21:07,605 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:21:10,912 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:21:14,246 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:21:18,006 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:21:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 56 not checked. [2018-11-10 06:21:18,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 06:21:18,071 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 06:21:18,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-10 06:21:42,087 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-10 06:21:42,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unknown [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Forcibly destroying the process [2018-11-10 06:21:43,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 06:21:43,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-11-10 06:21:43,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-10 06:21:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-10 06:21:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=89, Unknown=15, NotChecked=168, Total=306 [2018-11-10 06:21:43,807 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2018-11-10 06:21:47,493 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1)) (not (fp.eq c_main_~x1~0 c_main_~x~0)))) is different from true [2018-11-10 06:21:50,840 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse0) .cse0) .cse0) .cse0) .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-11-10 06:21:54,004 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 06:21:56,929 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 06:21:59,605 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (not (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0))) (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse1) .cse1) .cse1) .cse1) .cse1)))) is different from true [2018-11-10 06:22:02,047 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) (not (let ((.cse1 (fp.div RNE c_main_~x1~0 .cse0))) (fp.eq (fp.div RNE .cse1 .cse0) .cse1))))) is different from true [2018-11-10 06:22:04,314 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) (not (fp.eq (fp.div RNE c_main_~x1~0 .cse0) c_main_~x1~0)))) is different from true [2018-11-10 06:22:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 06:22:09,886 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-11-10 06:22:10,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-10 06:22:10,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2018-11-10 06:22:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-10 06:22:10,159 INFO L225 Difference]: With dead ends: 33 [2018-11-10 06:22:10,159 INFO L226 Difference]: Without dead ends: 28 [2018-11-10 06:22:10,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=48, Invalid=96, Unknown=22, NotChecked=434, Total=600 [2018-11-10 06:22:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-10 06:22:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-10 06:22:10,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-10 06:22:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-11-10 06:22:10,166 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2018-11-10 06:22:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-10 06:22:10,166 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-11-10 06:22:10,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-10 06:22:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-11-10 06:22:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-10 06:22:10,167 INFO L367 BasicCegarLoop]: Found error trace [2018-11-10 06:22:10,167 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 06:22:10,167 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-10 06:22:10,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 06:22:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash 397284265, now seen corresponding path program 5 times [2018-11-10 06:22:10,168 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-11-10 06:22:10,168 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_9645171a-b8b7-4b0e-a386-de1c709ba931/bin-2019/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2018-11-10 06:22:10,171 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-10 06:22:14,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-11-10 06:22:14,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 06:22:14,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 06:22:16,959 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (and (= c_main_~x1~0 (fp.div RNE c_main_~x~0 .cse0)) (= (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE ((_ to_fp 11 53) RNE 1.0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) c_main_~x~0))) is different from true [2018-11-10 06:22:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2018-11-10 06:22:16,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-10 06:22:19,245 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq (fp.div RNE c_main_~x1~0 ((_ to_fp 11 53) RNE (/ 8.0 5.0))) c_main_~x1~0)) is different from false [2018-11-10 06:22:22,300 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE c_main_~x1~0 .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:22:26,518 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:22:29,227 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:22:32,131 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:22:35,059 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:22:38,207 WARN L832 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from false [2018-11-10 06:22:41,371 WARN L854 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ to_fp 11 53) RNE (/ 8.0 5.0)))) (let ((.cse0 (fp.div RNE (fp.div RNE (fp.div RNE (fp.div RNE c_main_~x1~0 .cse1) .cse1) .cse1) .cse1))) (fp.eq (fp.div RNE .cse0 .cse1) .cse0)))) is different from true [2018-11-10 06:22:43,325 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2018-11-10 06:22:43,526 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2018-11-10 06:22:43,527 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.checkSat(ManagedScript.java:141) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:84) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:823) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:767) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:339) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:418) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:290) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:435) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) 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) ... 40 more [2018-11-10 06:22:43,530 INFO L168 Benchmark]: Toolchain (without parser) took 362010.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 949.8 MB in the beginning and 883.9 MB in the end (delta: 65.8 MB). Peak memory consumption was 200.6 MB. Max. memory is 11.5 GB. [2018-11-10 06:22:43,530 INFO L168 Benchmark]: CDTParser took 0.13 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. [2018-11-10 06:22:43,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.31 ms. Allocated memory is still 1.0 GB. Free memory was 949.8 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:22:43,531 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.18 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 06:22:43,531 INFO L168 Benchmark]: Boogie Preprocessor took 14.79 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 06:22:43,532 INFO L168 Benchmark]: RCFGBuilder took 896.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2018-11-10 06:22:43,532 INFO L168 Benchmark]: TraceAbstraction took 360908.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 883.9 MB in the end (delta: 226.7 MB). Peak memory consumption was 226.7 MB. Max. memory is 11.5 GB. [2018-11-10 06:22:43,535 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.31 ms. Allocated memory is still 1.0 GB. Free memory was 949.8 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.18 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.79 ms. Allocated memory is still 1.0 GB. Free memory was 939.0 MB in the beginning and 933.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 896.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 933.6 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 360908.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 883.9 MB in the end (delta: 226.7 MB). Peak memory consumption was 226.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : 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...