./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c -s /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fb0b06f0fabe52e4995034e0b478ee6377b6d993 ........................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c -s /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fb0b06f0fabe52e4995034e0b478ee6377b6d993 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:34,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:34,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:34,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:34,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:34,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:34,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:34,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:34,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:34,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:34,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:34,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:34,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:34,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:34,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:34,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:34,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:34,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:34,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:34,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:34,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:34,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:34,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:34,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:34,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:34,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:34,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:34,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:34,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:34,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:34,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:34,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:34,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:34,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:34,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:34,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:34,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:34,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:34,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:34,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:34,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:34,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:56:34,327 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:34,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:34,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:34,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:34,329 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:34,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:56:34,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:34,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:56:34,331 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:34,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:34,332 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:34,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:56:34,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:34,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:34,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:34,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:34,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:34,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:34,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:34,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:56:34,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:56:34,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:56:34,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:56:34,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer 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 -> Automizer 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 -> fb0b06f0fabe52e4995034e0b478ee6377b6d993 [2019-10-22 08:56:34,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:34,396 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:34,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:34,401 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:34,401 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:34,402 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2019-10-22 08:56:34,454 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/a93375483/b900c1ed8c964892859e5232141b305a/FLAG847c24f14 [2019-10-22 08:56:34,848 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:34,849 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2019-10-22 08:56:34,856 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/a93375483/b900c1ed8c964892859e5232141b305a/FLAG847c24f14 [2019-10-22 08:56:34,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/a93375483/b900c1ed8c964892859e5232141b305a [2019-10-22 08:56:34,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:34,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:34,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:34,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:34,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:34,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:34" (1/1) ... [2019-10-22 08:56:34,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3866b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:34, skipping insertion in model container [2019-10-22 08:56:34,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:34" (1/1) ... [2019-10-22 08:56:34,889 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:34,911 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:35,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:35,154 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:35,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:35,237 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:35,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35 WrapperNode [2019-10-22 08:56:35,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:35,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:35,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:35,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:35,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:35,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:35,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:35,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:35,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... [2019-10-22 08:56:35,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:35,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:35,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:35,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:35,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:35,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:56:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-10-22 08:56:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:56:35,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-22 08:56:35,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:35,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:35,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:56:35,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:56:35,852 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:35,852 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:56:35,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:35 BoogieIcfgContainer [2019-10-22 08:56:35,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:35,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:35,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:35,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:35,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:34" (1/3) ... [2019-10-22 08:56:35,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c3a533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:35, skipping insertion in model container [2019-10-22 08:56:35,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:35" (2/3) ... [2019-10-22 08:56:35,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c3a533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:35, skipping insertion in model container [2019-10-22 08:56:35,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:35" (3/3) ... [2019-10-22 08:56:35,868 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730c.c [2019-10-22 08:56:35,883 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:35,893 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:56:35,908 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:56:35,942 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:35,942 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:56:35,942 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:35,942 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:35,946 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:35,946 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:35,946 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:35,946 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-10-22 08:56:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:56:35,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:35,977 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:35,979 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 361085180, now seen corresponding path program 1 times [2019-10-22 08:56:35,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:35,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080406664] [2019-10-22 08:56:35,996 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:35,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:35,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:36,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080406664] [2019-10-22 08:56:36,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:36,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:56:36,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899115353] [2019-10-22 08:56:36,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:56:36,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:56:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:56:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:56:36,169 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2019-10-22 08:56:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:36,193 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2019-10-22 08:56:36,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:56:36,195 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-10-22 08:56:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:36,210 INFO L225 Difference]: With dead ends: 104 [2019-10-22 08:56:36,210 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 08:56:36,216 INFO L600 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 [2019-10-22 08:56:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 08:56:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 08:56:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:56:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2019-10-22 08:56:36,264 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 8 [2019-10-22 08:56:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:36,264 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2019-10-22 08:56:36,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:56:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2019-10-22 08:56:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:56:36,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:36,265 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:36,266 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash 331839487, now seen corresponding path program 1 times [2019-10-22 08:56:36,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:56:36,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695018186] [2019-10-22 08:56:36,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:36,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:56:36,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:56:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:56:36,341 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:56:36,341 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:56:36,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:56:36 BoogieIcfgContainer [2019-10-22 08:56:36,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:56:36,377 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:56:36,377 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:56:36,378 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:56:36,378 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:35" (3/4) ... [2019-10-22 08:56:36,382 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:56:36,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:56:36,385 INFO L168 Benchmark]: Toolchain (without parser) took 1512.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -118.4 MB). Peak memory consumption was 19.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,385 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:36,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,387 INFO L168 Benchmark]: Boogie Preprocessor took 52.52 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,388 INFO L168 Benchmark]: RCFGBuilder took 510.06 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: 35.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,389 INFO L168 Benchmark]: TraceAbstraction took 522.52 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:36,389 INFO L168 Benchmark]: Witness Printer took 5.34 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. [2019-10-22 08:56:36,392 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 966.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 365.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 948.5 MB in the beginning and 1.1 GB in the end (delta: -182.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.52 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 510.06 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: 35.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 522.52 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: 24.2 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Witness Printer took 5.34 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: 154]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 153, overapproximation of someBinaryArithmeticDOUBLEoperation at line 33, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L17] static const double one_sqrt = 1.0, tiny_sqrt = 1.0e-300; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L149] double x = 0.0; [L20] double z; [L21] __int32_t sign = 0x80000000; [L22] __uint32_t r, t1, s1, ix1, q1; [L23] __int32_t ix0, s0, q, m, t, i; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L26] ieee_double_shape_type ew_u; [L27] ew_u.value = (x) [L28] EXPR ew_u.parts.msw [L28] (ix0) = ew_u.parts.msw [L29] EXPR ew_u.parts.lsw [L29] (ix1) = ew_u.parts.lsw [L32] COND TRUE (ix0 & 0x7ff00000) == 0x7ff00000 [L33] return x * x + x; VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L150] double res = __ieee754_sqrt(x); [L153] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] [L153] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L154] __VERIFIER_error() VAL [one_sqrt=1, tiny_sqrt=1/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 73 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=53occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 08:56:38,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:56:38,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:56:38,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:56:38,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:56:38,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:56:38,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:56:38,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:56:38,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:56:38,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:56:38,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:56:38,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:56:38,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:56:38,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:56:38,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:56:38,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:56:38,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:56:38,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:56:38,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:56:38,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:56:38,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:56:38,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:56:38,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:56:38,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:56:38,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:56:38,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:56:38,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:56:38,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:56:38,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:56:38,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:56:38,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:56:38,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:56:38,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:56:38,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:56:38,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:56:38,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:56:38,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:56:38,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:56:38,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:56:38,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:56:38,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:56:38,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-10-22 08:56:38,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:56:38,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:56:38,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:56:38,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:56:38,751 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:56:38,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:56:38,752 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:56:38,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:56:38,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:56:38,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:56:38,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:56:38,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:56:38,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 08:56:38,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 08:56:38,753 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:56:38,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:56:38,754 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:56:38,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:56:38,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:56:38,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:56:38,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:56:38,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:56:38,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:56:38,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:56:38,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:56:38,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:56:38,755 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-10-22 08:56:38,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 08:56:38,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:56:38,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 08:56:38,756 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer 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 -> Automizer 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 -> fb0b06f0fabe52e4995034e0b478ee6377b6d993 [2019-10-22 08:56:38,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:56:38,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:56:38,807 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:56:38,809 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:56:38,810 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:56:38,811 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/../../sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2019-10-22 08:56:38,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/31135e797/4fe8758518614af5ae49bf9c277f2faa/FLAG7943290e8 [2019-10-22 08:56:39,309 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:56:39,309 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/sv-benchmarks/c/float-newlib/double_req_bl_0730c.c [2019-10-22 08:56:39,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/31135e797/4fe8758518614af5ae49bf9c277f2faa/FLAG7943290e8 [2019-10-22 08:56:39,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/data/31135e797/4fe8758518614af5ae49bf9c277f2faa [2019-10-22 08:56:39,663 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:56:39,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:56:39,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:39,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:56:39,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:56:39,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:39" (1/1) ... [2019-10-22 08:56:39,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d6f690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:39, skipping insertion in model container [2019-10-22 08:56:39,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:56:39" (1/1) ... [2019-10-22 08:56:39,683 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:56:39,710 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:56:39,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:39,957 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:56:40,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:56:40,100 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:56:40,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40 WrapperNode [2019-10-22 08:56:40,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:56:40,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:40,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:56:40,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:56:40,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:56:40,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:56:40,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:56:40,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:56:40,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... [2019-10-22 08:56:40,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:56:40,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:56:40,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:56:40,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:56:40,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2019-10-22 08:56:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2019-10-22 08:56:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:56:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-10-22 08:56:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:56:40,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:56:40,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 08:56:40,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:56:43,834 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:56:43,835 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-10-22 08:56:43,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:43 BoogieIcfgContainer [2019-10-22 08:56:43,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:56:43,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:56:43,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:56:43,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:56:43,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:56:39" (1/3) ... [2019-10-22 08:56:43,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dad94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:43, skipping insertion in model container [2019-10-22 08:56:43,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:56:40" (2/3) ... [2019-10-22 08:56:43,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dad94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:56:43, skipping insertion in model container [2019-10-22 08:56:43,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:56:43" (3/3) ... [2019-10-22 08:56:43,849 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_0730c.c [2019-10-22 08:56:43,857 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:56:43,866 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:56:43,876 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:56:43,898 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:56:43,898 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:56:43,898 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:56:43,898 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:56:43,898 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:56:43,899 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:56:43,899 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:56:43,899 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:56:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-10-22 08:56:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:56:43,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:43,918 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:43,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash 361085180, now seen corresponding path program 1 times [2019-10-22 08:56:43,932 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:43,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751629479] [2019-10-22 08:56:43,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:44,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-22 08:56:44,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:44,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:44,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751629479] [2019-10-22 08:56:44,316 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:44,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-22 08:56:44,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006686525] [2019-10-22 08:56:44,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-22 08:56:44,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-22 08:56:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:56:44,334 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2019-10-22 08:56:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:44,356 INFO L93 Difference]: Finished difference Result 104 states and 166 transitions. [2019-10-22 08:56:44,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-22 08:56:44,357 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-10-22 08:56:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:44,366 INFO L225 Difference]: With dead ends: 104 [2019-10-22 08:56:44,367 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 08:56:44,369 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-22 08:56:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 08:56:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 08:56:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 08:56:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2019-10-22 08:56:44,397 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 8 [2019-10-22 08:56:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:44,398 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2019-10-22 08:56:44,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-22 08:56:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2019-10-22 08:56:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:56:44,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:44,398 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:44,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-10-22 08:56:44,599 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:44,600 INFO L82 PathProgramCache]: Analyzing trace with hash 331839487, now seen corresponding path program 1 times [2019-10-22 08:56:44,600 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:44,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218685247] [2019-10-22 08:56:44,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:45,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:45,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:45,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:45,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218685247] [2019-10-22 08:56:45,099 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:45,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:56:45,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987540168] [2019-10-22 08:56:45,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:45,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:45,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:45,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:45,102 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand 6 states. [2019-10-22 08:56:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:46,226 INFO L93 Difference]: Finished difference Result 105 states and 142 transitions. [2019-10-22 08:56:46,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:46,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-10-22 08:56:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:46,229 INFO L225 Difference]: With dead ends: 105 [2019-10-22 08:56:46,229 INFO L226 Difference]: Without dead ends: 63 [2019-10-22 08:56:46,230 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-22 08:56:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2019-10-22 08:56:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:56:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2019-10-22 08:56:46,239 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 9 [2019-10-22 08:56:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:46,239 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2019-10-22 08:56:46,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2019-10-22 08:56:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 08:56:46,240 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:46,240 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:46,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-10-22 08:56:46,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1929218748, now seen corresponding path program 1 times [2019-10-22 08:56:46,442 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:46,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36305710] [2019-10-22 08:56:46,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:46,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:56:46,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:46,538 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:46,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:46,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36305710] [2019-10-22 08:56:46,580 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:46,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-22 08:56:46,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079167695] [2019-10-22 08:56:46,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:56:46,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:56:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:56:46,581 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 7 states. [2019-10-22 08:56:46,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:46,753 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-22 08:56:46,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:56:46,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-22 08:56:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:46,756 INFO L225 Difference]: With dead ends: 63 [2019-10-22 08:56:46,756 INFO L226 Difference]: Without dead ends: 60 [2019-10-22 08:56:46,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-22 08:56:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2019-10-22 08:56:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-22 08:56:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2019-10-22 08:56:46,768 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 11 [2019-10-22 08:56:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:46,768 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2019-10-22 08:56:46,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:56:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2019-10-22 08:56:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 08:56:46,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:46,769 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:46,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-10-22 08:56:46,979 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:46,980 INFO L82 PathProgramCache]: Analyzing trace with hash 264903321, now seen corresponding path program 1 times [2019-10-22 08:56:46,980 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:46,980 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589160321] [2019-10-22 08:56:46,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2019-10-22 08:56:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:47,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 08:56:47,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:47,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:47,170 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:47,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:56:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:47,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589160321] [2019-10-22 08:56:47,375 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:47,375 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2019-10-22 08:56:47,375 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398379935] [2019-10-22 08:56:47,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:56:47,376 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:56:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:56:47,376 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand 14 states. [2019-10-22 08:56:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:47,725 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2019-10-22 08:56:47,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:56:47,726 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2019-10-22 08:56:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:47,727 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:56:47,727 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 08:56:47,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:56:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 08:56:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-22 08:56:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:56:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2019-10-22 08:56:47,734 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 15 [2019-10-22 08:56:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:47,734 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2019-10-22 08:56:47,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:56:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2019-10-22 08:56:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-22 08:56:47,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:47,735 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:47,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-10-22 08:56:47,936 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:47,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1807617568, now seen corresponding path program 1 times [2019-10-22 08:56:47,937 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:47,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281111344] [2019-10-22 08:56:47,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:48,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:48,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:48,075 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:56:48,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281111344] [2019-10-22 08:56:48,136 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:48,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 08:56:48,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028717671] [2019-10-22 08:56:48,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:56:48,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:48,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:48,138 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 8 states. [2019-10-22 08:56:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:48,520 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2019-10-22 08:56:48,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:48,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-10-22 08:56:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:48,522 INFO L225 Difference]: With dead ends: 87 [2019-10-22 08:56:48,522 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 08:56:48,523 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-22 08:56:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 08:56:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-22 08:56:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-22 08:56:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2019-10-22 08:56:48,528 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 27 [2019-10-22 08:56:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:48,529 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2019-10-22 08:56:48,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:56:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2019-10-22 08:56:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-22 08:56:48,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:48,530 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:48,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-10-22 08:56:48,737 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1685732611, now seen corresponding path program 1 times [2019-10-22 08:56:48,738 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:48,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102323420] [2019-10-22 08:56:48,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2019-10-22 08:56:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:48,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 08:56:48,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:56:48,838 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:56:48,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102323420] [2019-10-22 08:56:48,845 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:48,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-22 08:56:48,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026685846] [2019-10-22 08:56:48,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:56:48,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:48,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:56:48,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:48,847 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 4 states. [2019-10-22 08:56:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:48,888 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2019-10-22 08:56:48,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:56:48,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-22 08:56:48,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:48,889 INFO L225 Difference]: With dead ends: 84 [2019-10-22 08:56:48,889 INFO L226 Difference]: Without dead ends: 55 [2019-10-22 08:56:48,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-22 08:56:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-22 08:56:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-22 08:56:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-22 08:56:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2019-10-22 08:56:48,893 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 32 [2019-10-22 08:56:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:48,893 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2019-10-22 08:56:48,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:56:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2019-10-22 08:56:48,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-22 08:56:48,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:48,894 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:49,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-10-22 08:56:49,095 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash 429259843, now seen corresponding path program 1 times [2019-10-22 08:56:49,096 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:49,096 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547491482] [2019-10-22 08:56:49,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:49,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:56:49,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:56:49,204 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 08:56:49,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547491482] [2019-10-22 08:56:49,230 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:49,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-22 08:56:49,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126429085] [2019-10-22 08:56:49,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:56:49,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:56:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:49,231 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 8 states. [2019-10-22 08:56:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:49,314 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2019-10-22 08:56:49,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:56:49,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2019-10-22 08:56:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:49,315 INFO L225 Difference]: With dead ends: 96 [2019-10-22 08:56:49,315 INFO L226 Difference]: Without dead ends: 67 [2019-10-22 08:56:49,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-22 08:56:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-22 08:56:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-22 08:56:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2019-10-22 08:56:49,322 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 38 [2019-10-22 08:56:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:49,322 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2019-10-22 08:56:49,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:56:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2019-10-22 08:56:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-22 08:56:49,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:49,324 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:49,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-10-22 08:56:49,529 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1788073277, now seen corresponding path program 2 times [2019-10-22 08:56:49,530 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:49,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269904845] [2019-10-22 08:56:49,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2019-10-22 08:56:49,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:56:49,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:49,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-22 08:56:49,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-22 08:56:49,611 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-10-22 08:56:49,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269904845] [2019-10-22 08:56:49,650 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:56:49,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-22 08:56:49,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649395651] [2019-10-22 08:56:49,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:56:49,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:56:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:56:49,651 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 6 states. [2019-10-22 08:56:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:49,716 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2019-10-22 08:56:49,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:56:49,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2019-10-22 08:56:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:49,717 INFO L225 Difference]: With dead ends: 96 [2019-10-22 08:56:49,717 INFO L226 Difference]: Without dead ends: 75 [2019-10-22 08:56:49,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:56:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-22 08:56:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-10-22 08:56:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-22 08:56:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2019-10-22 08:56:49,725 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 50 [2019-10-22 08:56:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:49,725 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2019-10-22 08:56:49,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:56:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2019-10-22 08:56:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-22 08:56:49,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:49,727 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:49,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-10-22 08:56:49,933 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:49,934 INFO L82 PathProgramCache]: Analyzing trace with hash -229463293, now seen corresponding path program 1 times [2019-10-22 08:56:49,934 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:49,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131037289] [2019-10-22 08:56:49,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/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 [2019-10-22 08:56:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:56:50,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:56:50,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 08:56:50,137 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 08:56:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 08:56:50,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131037289] [2019-10-22 08:56:50,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:56:50,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-10-22 08:56:50,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855801587] [2019-10-22 08:56:50,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-22 08:56:50,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-10-22 08:56:50,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-22 08:56:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:56:50,226 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand 16 states. [2019-10-22 08:56:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:56:50,460 INFO L93 Difference]: Finished difference Result 136 states and 188 transitions. [2019-10-22 08:56:50,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 08:56:50,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2019-10-22 08:56:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:56:50,462 INFO L225 Difference]: With dead ends: 136 [2019-10-22 08:56:50,462 INFO L226 Difference]: Without dead ends: 99 [2019-10-22 08:56:50,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-10-22 08:56:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-22 08:56:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-10-22 08:56:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-22 08:56:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 130 transitions. [2019-10-22 08:56:50,471 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 130 transitions. Word has length 56 [2019-10-22 08:56:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:56:50,471 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 130 transitions. [2019-10-22 08:56:50,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-22 08:56:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 130 transitions. [2019-10-22 08:56:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-22 08:56:50,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:56:50,473 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:56:50,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2019-10-22 08:56:50,674 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:56:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:56:50,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1054865405, now seen corresponding path program 2 times [2019-10-22 08:56:50,676 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-10-22 08:56:50,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260802577] [2019-10-22 08:56:50,676 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_911f0db7-430c-421f-b4ff-32db6aed237b/bin/uautomizer/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2019-10-22 08:56:50,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 08:56:50,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:56:50,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:56:50,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:56:51,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2019-10-22 08:56:51,010 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.downgradeDimensionsIfNecessary(ArrayOccurrenceAnalysis.java:171) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:132) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) 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.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) 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.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.checkFeasibility(TraceAbstractionRefinementEngine.java:244) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) 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) [2019-10-22 08:56:51,014 INFO L168 Benchmark]: Toolchain (without parser) took 11350.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.5 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -107.1 MB). Peak memory consumption was 77.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:51,015 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:51,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 435.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:51,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:51,016 INFO L168 Benchmark]: Boogie Preprocessor took 53.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:56:51,016 INFO L168 Benchmark]: RCFGBuilder took 3637.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:51,018 INFO L168 Benchmark]: TraceAbstraction took 7175.71 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 79.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:56:51,020 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 977.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 435.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 117.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 29.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.92 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 53.83 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 3637.28 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7175.71 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.7 MB). Peak memory consumption was 79.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:277) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...