./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.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/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 36a0a55241cede481b157c1ab9f348d708a5b166 ................................................................................................................................................................................................................................................................................................................................................................. 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/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 36a0a55241cede481b157c1ab9f348d708a5b166 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 21:19:00,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:19:00,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:19:00,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:19:00,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:19:00,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:19:00,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:19:00,657 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:19:00,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:19:00,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:19:00,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:19:00,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:19:00,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:19:00,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:19:00,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:19:00,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:19:00,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:19:00,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:19:00,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:19:00,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:19:00,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:19:00,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:19:00,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:19:00,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:19:00,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:19:00,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:19:00,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:19:00,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:19:00,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:19:00,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:19:00,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:19:00,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:19:00,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:19:00,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:19:00,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:19:00,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:19:00,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:19:00,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:19:00,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:19:00,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:19:00,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:19:00,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 21:19:00,706 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:19:00,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:19:00,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:19:00,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:19:00,708 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:19:00,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:19:00,708 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:19:00,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:19:00,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:19:00,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:19:00,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:19:00,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:19:00,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:19:00,710 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:19:00,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:19:00,710 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:19:00,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:19:00,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:19:00,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:19:00,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:19:00,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:19:00,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:19:00,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:19:00,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:19:00,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:19:00,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:19:00,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 21:19:00,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:19:00,714 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/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 -> 36a0a55241cede481b157c1ab9f348d708a5b166 [2019-11-15 21:19:00,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:19:00,751 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:19:00,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:19:00,757 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:19:00,758 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:19:00,758 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-11-15 21:19:00,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/e0915abd8/b9d14a93749c4141956b76f92d0712bf/FLAG29123220d [2019-11-15 21:19:01,242 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:19:01,245 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-11-15 21:19:01,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/e0915abd8/b9d14a93749c4141956b76f92d0712bf/FLAG29123220d [2019-11-15 21:19:01,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/e0915abd8/b9d14a93749c4141956b76f92d0712bf [2019-11-15 21:19:01,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:19:01,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:19:01,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:19:01,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:19:01,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:19:01,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5889ec26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01, skipping insertion in model container [2019-11-15 21:19:01,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,281 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:19:01,298 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:19:01,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:19:01,550 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:19:01,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:19:01,593 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:19:01,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01 WrapperNode [2019-11-15 21:19:01,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:19:01,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:19:01,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:19:01,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:19:01,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:19:01,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:19:01,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:19:01,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:19:01,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... [2019-11-15 21:19:01,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:19:01,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:19:01,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:19:01,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:19:01,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 21:19:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-11-15 21:19:01,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:19:01,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:19:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 21:19:01,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 21:19:02,150 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:19:02,150 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-15 21:19:02,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:02 BoogieIcfgContainer [2019-11-15 21:19:02,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:19:02,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:19:02,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:19:02,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:19:02,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:19:01" (1/3) ... [2019-11-15 21:19:02,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c4071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:19:02, skipping insertion in model container [2019-11-15 21:19:02,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:01" (2/3) ... [2019-11-15 21:19:02,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c4071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:19:02, skipping insertion in model container [2019-11-15 21:19:02,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:02" (3/3) ... [2019-11-15 21:19:02,164 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2019-11-15 21:19:02,173 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:19:02,182 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:19:02,192 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:19:02,212 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:19:02,212 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:19:02,213 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:19:02,213 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:19:02,213 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:19:02,213 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:19:02,214 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:19:02,214 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:19:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-15 21:19:02,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 21:19:02,234 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:02,235 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:02,237 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-15 21:19:02,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:19:02,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188457123] [2019-11-15 21:19:02,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:19:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:02,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188457123] [2019-11-15 21:19:02,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:02,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 21:19:02,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460885855] [2019-11-15 21:19:02,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 21:19:02,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:19:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 21:19:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:19:02,358 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-15 21:19:02,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:02,382 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-15 21:19:02,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 21:19:02,383 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 21:19:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:02,393 INFO L225 Difference]: With dead ends: 62 [2019-11-15 21:19:02,394 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 21:19:02,397 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 [2019-11-15 21:19:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 21:19:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 21:19:02,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 21:19:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-15 21:19:02,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-15 21:19:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:02,430 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-15 21:19:02,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 21:19:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-15 21:19:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 21:19:02,431 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:02,431 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:02,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:02,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-15 21:19:02,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:19:02,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408783848] [2019-11-15 21:19:02,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:19:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:02,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408783848] [2019-11-15 21:19:02,526 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:02,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 21:19:02,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917404832] [2019-11-15 21:19:02,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:19:02,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:19:02,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:19:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:19:02,528 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2019-11-15 21:19:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:02,591 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-15 21:19:02,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:19:02,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-15 21:19:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:02,593 INFO L225 Difference]: With dead ends: 53 [2019-11-15 21:19:02,593 INFO L226 Difference]: Without dead ends: 44 [2019-11-15 21:19:02,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:19:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-15 21:19:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-15 21:19:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 21:19:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 21:19:02,600 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-15 21:19:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:02,600 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 21:19:02,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:19:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 21:19:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 21:19:02,601 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:02,601 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:02,601 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:02,602 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2019-11-15 21:19:02,602 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:19:02,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124723502] [2019-11-15 21:19:02,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:19:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:02,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124723502] [2019-11-15 21:19:02,651 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:02,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 21:19:02,652 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9005331] [2019-11-15 21:19:02,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:19:02,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:19:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:19:02,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:19:02,653 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-15 21:19:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:02,735 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-15 21:19:02,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:19:02,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-15 21:19:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:02,737 INFO L225 Difference]: With dead ends: 55 [2019-11-15 21:19:02,737 INFO L226 Difference]: Without dead ends: 46 [2019-11-15 21:19:02,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:19:02,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-15 21:19:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2019-11-15 21:19:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 21:19:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 21:19:02,743 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2019-11-15 21:19:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:02,743 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 21:19:02,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:19:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 21:19:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 21:19:02,744 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:02,744 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:02,744 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:02,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:02,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-15 21:19:02,745 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:19:02,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330564608] [2019-11-15 21:19:02,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:19:02,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:19:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:19:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:19:02,855 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:19:02,855 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:19:02,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:19:02 BoogieIcfgContainer [2019-11-15 21:19:02,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:19:02,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:19:02,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:19:02,884 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:19:02,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:02" (3/4) ... [2019-11-15 21:19:02,888 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 21:19:02,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:19:02,890 INFO L168 Benchmark]: Toolchain (without parser) took 1622.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -131.7 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:02,891 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:19:02,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -209.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:02,892 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:02,893 INFO L168 Benchmark]: Boogie Preprocessor took 30.80 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. [2019-11-15 21:19:02,893 INFO L168 Benchmark]: RCFGBuilder took 484.35 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:02,894 INFO L168 Benchmark]: TraceAbstraction took 730.83 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:02,894 INFO L168 Benchmark]: Witness Printer took 4.43 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. [2019-11-15 21:19:02,898 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 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -209.1 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 41.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.80 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. * RCFGBuilder took 484.35 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 730.83 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.43 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: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 69, overapproximation of someUnaryFLOAToperation at line 64. Possible FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L23-L24] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L26-L27] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L29] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L32] return 0; [L36] COND TRUE __fpclassify_float(x) == 0 [L37] return y; [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 32 SDslu, 140 SDs, 0 SdLazy, 30 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 3 MinimizatonAttempts, 28 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 [2019-11-15 21:19:05,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:19:05,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:19:05,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:19:05,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:19:05,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:19:05,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:19:05,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:19:05,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:19:05,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:19:05,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:19:05,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:19:05,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:19:05,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:19:05,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:19:05,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:19:05,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:19:05,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:19:05,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:19:05,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:19:05,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:19:05,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:19:05,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:19:05,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:19:05,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:19:05,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:19:05,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:19:05,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:19:05,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:19:05,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:19:05,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:19:05,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:19:05,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:19:05,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:19:05,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:19:05,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:19:05,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:19:05,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:19:05,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:19:05,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:19:05,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:19:05,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-15 21:19:05,128 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:19:05,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:19:05,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:19:05,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:19:05,130 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:19:05,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:19:05,130 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 21:19:05,131 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-15 21:19:05,132 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-15 21:19:05,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 21:19:05,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:19:05,132 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:19:05,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 21:19:05,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:19:05,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:19:05,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 21:19:05,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 21:19:05,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 21:19:05,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:19:05,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 21:19:05,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 21:19:05,134 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-15 21:19:05,134 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-15 21:19:05,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 21:19:05,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-15 21:19:05,135 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/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 -> 36a0a55241cede481b157c1ab9f348d708a5b166 [2019-11-15 21:19:05,163 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:19:05,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:19:05,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:19:05,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:19:05,179 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:19:05,180 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/../../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-11-15 21:19:05,229 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/1c003f13a/abfa8148eeca479d815f7eb135ea3784/FLAG3515dea02 [2019-11-15 21:19:05,573 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:19:05,574 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2019-11-15 21:19:05,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/1c003f13a/abfa8148eeca479d815f7eb135ea3784/FLAG3515dea02 [2019-11-15 21:19:05,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/data/1c003f13a/abfa8148eeca479d815f7eb135ea3784 [2019-11-15 21:19:05,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:19:05,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:19:05,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:19:05,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:19:05,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:19:05,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:19:05" (1/1) ... [2019-11-15 21:19:05,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555e3547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:05, skipping insertion in model container [2019-11-15 21:19:05,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:19:05" (1/1) ... [2019-11-15 21:19:05,992 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:19:06,008 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:19:06,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:19:06,164 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:19:06,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:19:06,212 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:19:06,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06 WrapperNode [2019-11-15 21:19:06,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:19:06,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:19:06,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:19:06,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:19:06,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:19:06,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:19:06,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:19:06,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:19:06,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... [2019-11-15 21:19:06,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:19:06,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:19:06,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:19:06,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:19:06,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 21:19:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-15 21:19:06,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:19:06,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:19:06,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2019-11-15 21:19:06,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 21:19:06,794 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:19:06,795 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-15 21:19:06,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:06 BoogieIcfgContainer [2019-11-15 21:19:06,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:19:06,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 21:19:06,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 21:19:06,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 21:19:06,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 09:19:05" (1/3) ... [2019-11-15 21:19:06,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1575a654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:19:06, skipping insertion in model container [2019-11-15 21:19:06,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:19:06" (2/3) ... [2019-11-15 21:19:06,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1575a654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 09:19:06, skipping insertion in model container [2019-11-15 21:19:06,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:06" (3/3) ... [2019-11-15 21:19:06,803 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2019-11-15 21:19:06,812 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 21:19:06,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 21:19:06,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 21:19:06,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 21:19:06,849 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 21:19:06,849 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 21:19:06,849 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:19:06,849 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:19:06,849 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 21:19:06,849 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:19:06,849 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 21:19:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-15 21:19:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 21:19:06,867 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:06,868 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:06,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:06,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2019-11-15 21:19:06,881 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:06,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512547564] [2019-11-15 21:19:06,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:06,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-15 21:19:06,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:06,971 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:06,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512547564] [2019-11-15 21:19:06,975 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:06,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-15 21:19:06,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246848399] [2019-11-15 21:19:06,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 21:19:06,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 21:19:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:19:06,989 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-15 21:19:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:07,004 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2019-11-15 21:19:07,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 21:19:07,005 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 21:19:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:07,015 INFO L225 Difference]: With dead ends: 62 [2019-11-15 21:19:07,016 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 21:19:07,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 21:19:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 21:19:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-15 21:19:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-15 21:19:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-15 21:19:07,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2019-11-15 21:19:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:07,051 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-15 21:19:07,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 21:19:07,051 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-15 21:19:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 21:19:07,052 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:07,052 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:07,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-15 21:19:07,262 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2019-11-15 21:19:07,263 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:07,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239271522] [2019-11-15 21:19:07,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:07,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:19:07,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:07,380 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:07,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239271522] [2019-11-15 21:19:07,401 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:07,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 21:19:07,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323228275] [2019-11-15 21:19:07,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 21:19:07,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 21:19:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 21:19:07,404 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2019-11-15 21:19:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:07,581 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2019-11-15 21:19:07,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 21:19:07,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-15 21:19:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:07,586 INFO L225 Difference]: With dead ends: 68 [2019-11-15 21:19:07,586 INFO L226 Difference]: Without dead ends: 59 [2019-11-15 21:19:07,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:19:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-15 21:19:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2019-11-15 21:19:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-15 21:19:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2019-11-15 21:19:07,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2019-11-15 21:19:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:07,594 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2019-11-15 21:19:07,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 21:19:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2019-11-15 21:19:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-15 21:19:07,596 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:07,596 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:07,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-15 21:19:07,797 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2019-11-15 21:19:07,798 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:07,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076396836] [2019-11-15 21:19:07,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:07,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 21:19:07,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:07,890 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:07,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076396836] [2019-11-15 21:19:07,922 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:07,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-15 21:19:07,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951136052] [2019-11-15 21:19:07,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:19:07,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:07,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:19:07,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:19:07,924 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2019-11-15 21:19:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:07,995 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2019-11-15 21:19:07,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 21:19:07,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-15 21:19:07,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:07,996 INFO L225 Difference]: With dead ends: 52 [2019-11-15 21:19:07,997 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 21:19:07,997 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:19:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 21:19:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-15 21:19:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 21:19:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-15 21:19:08,002 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2019-11-15 21:19:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:08,002 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-15 21:19:08,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:19:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-15 21:19:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-15 21:19:08,004 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:08,004 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:08,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-15 21:19:08,218 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:08,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2019-11-15 21:19:08,219 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:08,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460949521] [2019-11-15 21:19:08,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:08,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 21:19:08,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:08,316 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:08,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460949521] [2019-11-15 21:19:08,337 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:08,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-15 21:19:08,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052959209] [2019-11-15 21:19:08,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 21:19:08,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 21:19:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 21:19:08,338 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2019-11-15 21:19:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:08,448 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2019-11-15 21:19:08,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 21:19:08,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-15 21:19:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:08,452 INFO L225 Difference]: With dead ends: 61 [2019-11-15 21:19:08,452 INFO L226 Difference]: Without dead ends: 52 [2019-11-15 21:19:08,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-15 21:19:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-15 21:19:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2019-11-15 21:19:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 21:19:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-15 21:19:08,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-11-15 21:19:08,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:08,461 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-15 21:19:08,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 21:19:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-15 21:19:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 21:19:08,462 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:08,464 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:08,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-15 21:19:08,682 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2019-11-15 21:19:08,683 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:08,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639058773] [2019-11-15 21:19:08,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:08,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 21:19:08,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:08,771 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:08,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639058773] [2019-11-15 21:19:08,802 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:08,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-15 21:19:08,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980011786] [2019-11-15 21:19:08,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 21:19:08,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:08,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 21:19:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:19:08,804 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-11-15 21:19:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:08,824 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-15 21:19:08,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 21:19:08,827 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-15 21:19:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:08,828 INFO L225 Difference]: With dead ends: 38 [2019-11-15 21:19:08,828 INFO L226 Difference]: Without dead ends: 28 [2019-11-15 21:19:08,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 21:19:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-15 21:19:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-15 21:19:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-15 21:19:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-15 21:19:08,837 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-15 21:19:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:08,837 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-15 21:19:08,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 21:19:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-15 21:19:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 21:19:08,838 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:08,838 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:09,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-15 21:19:09,062 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2019-11-15 21:19:09,062 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:09,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075741700] [2019-11-15 21:19:09,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:09,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 21:19:09,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:09,185 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:09,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 21:19:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:09,269 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075741700] [2019-11-15 21:19:09,269 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:09,269 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-15 21:19:09,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117018863] [2019-11-15 21:19:09,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 21:19:09,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 21:19:09,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-15 21:19:09,271 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2019-11-15 21:19:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:09,428 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2019-11-15 21:19:09,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 21:19:09,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2019-11-15 21:19:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:09,430 INFO L225 Difference]: With dead ends: 40 [2019-11-15 21:19:09,430 INFO L226 Difference]: Without dead ends: 37 [2019-11-15 21:19:09,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-11-15 21:19:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-15 21:19:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2019-11-15 21:19:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-15 21:19:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-15 21:19:09,437 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2019-11-15 21:19:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:09,438 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-15 21:19:09,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 21:19:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-15 21:19:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 21:19:09,438 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:09,439 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:19:09,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2019-11-15 21:19:09,639 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2019-11-15 21:19:09,640 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:09,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608549516] [2019-11-15 21:19:09,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:19:09,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 21:19:09,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:19:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:09,759 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-15 21:19:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:19:09,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608549516] [2019-11-15 21:19:09,782 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-15 21:19:09,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-15 21:19:09,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731007218] [2019-11-15 21:19:09,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 21:19:09,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-15 21:19:09,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 21:19:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-15 21:19:09,784 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-15 21:19:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:19:09,842 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-15 21:19:09,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 21:19:09,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-15 21:19:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 21:19:09,845 INFO L225 Difference]: With dead ends: 43 [2019-11-15 21:19:09,845 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 21:19:09,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-15 21:19:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 21:19:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-15 21:19:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-15 21:19:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2019-11-15 21:19:09,848 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2019-11-15 21:19:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 21:19:09,848 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2019-11-15 21:19:09,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 21:19:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2019-11-15 21:19:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 21:19:09,849 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 21:19:09,849 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] [2019-11-15 21:19:10,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2019-11-15 21:19:10,054 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 21:19:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:19:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2019-11-15 21:19:10,054 INFO L157 tionRefinementEngine]: Executing refinement strategy WOLF [2019-11-15 21:19:10,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7118096] [2019-11-15 21:19:10,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/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 [2019-11-15 21:19:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:19:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:19:10,282 INFO L168 tionRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-15 21:19:10,283 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 21:19:10,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2019-11-15 21:19:10,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 09:19:10 BoogieIcfgContainer [2019-11-15 21:19:10,527 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 21:19:10,527 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:19:10,527 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:19:10,528 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:19:10,528 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:19:06" (3/4) ... [2019-11-15 21:19:10,530 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 21:19:10,581 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2ffb81cd-b8bd-48eb-ae50-343c43c208a9/bin/uautomizer/witness.graphml [2019-11-15 21:19:10,581 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:19:10,583 INFO L168 Benchmark]: Toolchain (without parser) took 4605.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 952.3 MB in the beginning and 863.5 MB in the end (delta: 88.8 MB). Peak memory consumption was 189.5 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:10,584 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:19:10,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.07 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:10,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:10,585 INFO L168 Benchmark]: Boogie Preprocessor took 31.43 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. [2019-11-15 21:19:10,586 INFO L168 Benchmark]: RCFGBuilder took 439.84 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: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:10,586 INFO L168 Benchmark]: TraceAbstraction took 3729.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 193.3 MB). Peak memory consumption was 193.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:19:10,587 INFO L168 Benchmark]: Witness Printer took 53.86 ms. Allocated memory is still 1.1 GB. Free memory is still 863.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 21:19:10,589 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 235.07 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 111.16 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 100.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -147.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.43 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 439.84 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: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3729.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 193.3 MB). Peak memory consumption was 193.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.86 ms. Allocated memory is still 1.1 GB. Free memory is still 863.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 70]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L64] float x = -0.0f; [L65] float y = 0.0f; [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND TRUE w == 0x00000000 || w == 0x80000000 [L22] return 2; [L36] COND FALSE !(__fpclassify_float(x) == 0) [L13] __uint32_t w; [L16] ieee_float_shape_type gf_u; [L17] gf_u.value = (x) [L18] EXPR gf_u.word [L18] (w) = gf_u.word [L21] COND TRUE w == 0x00000000 || w == 0x80000000 [L22] return 2; [L38] COND FALSE !(__fpclassify_float(y) == 0) [L41] EXPR x < y ? x : y [L41] return x < y ? x : y; [L66] float res = fmin_float(x, y); [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L45] __uint32_t w; [L48] ieee_float_shape_type gf_u; [L49] gf_u.value = (x) [L50] EXPR gf_u.word [L50] (w) = gf_u.word [L53] return (w & 0x80000000) != 0; [L69] EXPR res == -0.0f && __signbit_float(res) == 1 [L69] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 191 SDslu, 324 SDs, 0 SdLazy, 100 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7783 SizeOfPredicates, 27 NumberOfNonLiveVariables, 314 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 proved your program to be incorrect! Received shutdown request...