./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 ebf754a3963f6f2e62a58c5af4648497776f95f2 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 ebf754a3963f6f2e62a58c5af4648497776f95f2 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:35:54,252 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:35:54,253 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:35:54,264 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:35:54,264 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:35:54,265 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:35:54,266 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:35:54,268 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:35:54,269 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:35:54,270 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:35:54,271 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:35:54,271 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:35:54,271 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:35:54,272 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:35:54,273 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:35:54,274 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:35:54,277 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:35:54,279 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:35:54,280 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:35:54,282 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:35:54,295 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:35:54,296 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:35:54,298 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:35:54,298 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:35:54,298 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:35:54,299 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:35:54,300 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:35:54,301 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:35:54,301 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:35:54,302 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:35:54,306 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:35:54,307 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:35:54,307 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:35:54,307 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:35:54,308 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:35:54,308 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:35:54,308 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-26 23:35:54,321 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:35:54,321 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:35:54,322 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:35:54,323 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 23:35:54,323 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 23:35:54,323 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 23:35:54,324 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 23:35:54,324 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:35:54,324 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:35:54,324 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 23:35:54,324 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:35:54,324 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:35:54,325 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:35:54,326 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:35:54,326 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:35:54,326 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:35:54,326 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:35:54,328 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:35:54,328 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 23:35:54,329 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 -> ebf754a3963f6f2e62a58c5af4648497776f95f2 [2018-10-26 23:35:54,368 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:35:54,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:35:54,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:35:54,387 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:35:54,388 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:35:54,388 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:35:54,439 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/50f314f69/ce432855cd6b4d78a24f3c0133022238/FLAG31345a97f [2018-10-26 23:35:54,760 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:35:54,760 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:35:54,767 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/50f314f69/ce432855cd6b4d78a24f3c0133022238/FLAG31345a97f [2018-10-26 23:35:54,781 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/50f314f69/ce432855cd6b4d78a24f3c0133022238 [2018-10-26 23:35:54,784 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:35:54,785 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:35:54,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:35:54,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:35:54,790 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:35:54,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:35:54" (1/1) ... [2018-10-26 23:35:54,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e851303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:54, skipping insertion in model container [2018-10-26 23:35:54,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:35:54" (1/1) ... [2018-10-26 23:35:54,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:35:54,821 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:35:54,969 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:35:54,973 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:35:54,988 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:35:55,001 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:35:55,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55 WrapperNode [2018-10-26 23:35:55,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:35:55,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:35:55,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:35:55,003 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:35:55,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... [2018-10-26 23:35:55,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:35:55,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:35:55,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:35:55,033 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:35:55,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:35:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:35:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:35:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 23:35:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:35:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 23:35:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 23:35:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:35:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:35:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:35:55,310 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:35:55,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:35:55 BoogieIcfgContainer [2018-10-26 23:35:55,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:35:55,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:35:55,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:35:55,314 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:35:55,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:35:54" (1/3) ... [2018-10-26 23:35:55,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c601b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:35:55, skipping insertion in model container [2018-10-26 23:35:55,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:35:55" (2/3) ... [2018-10-26 23:35:55,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c601b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:35:55, skipping insertion in model container [2018-10-26 23:35:55,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:35:55" (3/3) ... [2018-10-26 23:35:55,317 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:35:55,324 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:35:55,330 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:35:55,344 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:35:55,371 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:35:55,372 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:35:55,372 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:35:55,372 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:35:55,372 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:35:55,372 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:35:55,373 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:35:55,373 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:35:55,373 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:35:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 23:35:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 23:35:55,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:55,396 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:55,399 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:55,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 563245249, now seen corresponding path program 1 times [2018-10-26 23:35:55,406 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:55,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:55,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:55,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:55,490 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:35:55,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 23:35:55,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 23:35:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 23:35:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:35:55,505 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 23:35:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:55,521 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-10-26 23:35:55,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 23:35:55,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 23:35:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:55,530 INFO L225 Difference]: With dead ends: 32 [2018-10-26 23:35:55,530 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 23:35:55,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:35:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 23:35:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 23:35:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 23:35:55,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 23:35:55,563 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 23:35:55,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:55,563 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 23:35:55,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 23:35:55,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 23:35:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 23:35:55,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:55,565 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:55,565 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:55,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash -496423, now seen corresponding path program 1 times [2018-10-26 23:35:55,565 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:55,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:55,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:55,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:55,751 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2018-10-26 23:35:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:55,759 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:35:55,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:35:55,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:35:55,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:35:55,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:35:55,761 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-26 23:35:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:55,852 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 23:35:55,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:35:55,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 23:35:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:55,853 INFO L225 Difference]: With dead ends: 21 [2018-10-26 23:35:55,853 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 23:35:55,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:35:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 23:35:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-26 23:35:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 23:35:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 23:35:55,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-26 23:35:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:55,858 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 23:35:55,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:35:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 23:35:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 23:35:55,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:55,859 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:55,859 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:55,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1177044387, now seen corresponding path program 1 times [2018-10-26 23:35:55,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:55,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:55,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:55,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:55,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:55,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:55,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:55,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:55,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:55,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-26 23:35:55,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-26 23:35:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-26 23:35:55,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 23:35:55,991 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-10-26 23:35:56,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:56,031 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-26 23:35:56,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 23:35:56,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-10-26 23:35:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:56,034 INFO L225 Difference]: With dead ends: 24 [2018-10-26 23:35:56,034 INFO L226 Difference]: Without dead ends: 19 [2018-10-26 23:35:56,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-26 23:35:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-26 23:35:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-10-26 23:35:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 23:35:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 23:35:56,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-10-26 23:35:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:56,039 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 23:35:56,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-26 23:35:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 23:35:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 23:35:56,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:56,040 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:56,040 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:56,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash -489337255, now seen corresponding path program 2 times [2018-10-26 23:35:56,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:56,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:56,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:56,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:56,128 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:56,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:35:56,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:35:56,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:56,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:56,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-26 23:35:56,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 23:35:56,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 23:35:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:35:56,204 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-26 23:35:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:56,235 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-26 23:35:56,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 23:35:56,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-26 23:35:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:56,237 INFO L225 Difference]: With dead ends: 27 [2018-10-26 23:35:56,238 INFO L226 Difference]: Without dead ends: 22 [2018-10-26 23:35:56,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 23:35:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-26 23:35:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-26 23:35:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 23:35:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-26 23:35:56,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-10-26 23:35:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:56,243 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-26 23:35:56,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 23:35:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-26 23:35:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 23:35:56,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:56,244 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:56,244 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:56,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash -169763, now seen corresponding path program 3 times [2018-10-26 23:35:56,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:56,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:56,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:56,375 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:56,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:35:56,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 23:35:56,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:56,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:56,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-26 23:35:56,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:35:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:35:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:35:56,439 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 6 states. [2018-10-26 23:35:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:56,473 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-26 23:35:56,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:35:56,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-26 23:35:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:56,474 INFO L225 Difference]: With dead ends: 30 [2018-10-26 23:35:56,474 INFO L226 Difference]: Without dead ends: 25 [2018-10-26 23:35:56,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:35:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-26 23:35:56,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2018-10-26 23:35:56,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 23:35:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-26 23:35:56,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-10-26 23:35:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:56,481 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-26 23:35:56,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:35:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-26 23:35:56,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 23:35:56,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:56,483 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:56,483 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:56,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash -35450919, now seen corresponding path program 4 times [2018-10-26 23:35:56,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:56,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:56,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:56,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:56,741 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:56,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:35:56,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:35:56,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:56,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:56,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:56,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-26 23:35:56,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 23:35:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 23:35:56,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:35:56,807 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2018-10-26 23:35:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:56,859 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-26 23:35:56,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 23:35:56,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-26 23:35:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:56,861 INFO L225 Difference]: With dead ends: 33 [2018-10-26 23:35:56,861 INFO L226 Difference]: Without dead ends: 28 [2018-10-26 23:35:56,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:35:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-26 23:35:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-26 23:35:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-26 23:35:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-26 23:35:56,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-10-26 23:35:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:56,866 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-26 23:35:56,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 23:35:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-26 23:35:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-26 23:35:56,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:56,867 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:56,867 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:56,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1170618205, now seen corresponding path program 5 times [2018-10-26 23:35:56,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:56,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:56,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:57,060 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:57,076 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 23:35:57,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 23:35:57,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:57,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:57,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-26 23:35:57,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 23:35:57,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 23:35:57,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:35:57,141 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-26 23:35:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:57,179 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-26 23:35:57,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 23:35:57,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-26 23:35:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:57,181 INFO L225 Difference]: With dead ends: 36 [2018-10-26 23:35:57,181 INFO L226 Difference]: Without dead ends: 31 [2018-10-26 23:35:57,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 23:35:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-26 23:35:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-10-26 23:35:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-26 23:35:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-26 23:35:57,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-10-26 23:35:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:57,185 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-26 23:35:57,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 23:35:57,186 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-26 23:35:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-26 23:35:57,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:57,186 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:57,186 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:57,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash -520507047, now seen corresponding path program 6 times [2018-10-26 23:35:57,187 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:57,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:57,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:57,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:57,251 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:57,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 23:35:57,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 23:35:57,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:57,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:57,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-26 23:35:57,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 23:35:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 23:35:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:35:57,302 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 9 states. [2018-10-26 23:35:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:57,501 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-26 23:35:57,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 23:35:57,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2018-10-26 23:35:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:57,502 INFO L225 Difference]: With dead ends: 39 [2018-10-26 23:35:57,502 INFO L226 Difference]: Without dead ends: 34 [2018-10-26 23:35:57,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 23:35:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-26 23:35:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-26 23:35:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 23:35:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-26 23:35:57,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-10-26 23:35:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:57,509 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-26 23:35:57,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 23:35:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-26 23:35:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 23:35:57,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:57,510 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:57,510 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:57,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash -866507299, now seen corresponding path program 7 times [2018-10-26 23:35:57,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:57,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:57,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:57,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:57,698 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-26 23:35:57,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:57,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:57,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:57,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-26 23:35:57,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 23:35:57,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 23:35:57,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:35:57,765 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 10 states. [2018-10-26 23:35:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:57,807 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-26 23:35:57,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 23:35:57,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2018-10-26 23:35:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:57,809 INFO L225 Difference]: With dead ends: 42 [2018-10-26 23:35:57,809 INFO L226 Difference]: Without dead ends: 37 [2018-10-26 23:35:57,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 23:35:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-26 23:35:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2018-10-26 23:35:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-26 23:35:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-26 23:35:57,814 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-10-26 23:35:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:57,814 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-26 23:35:57,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 23:35:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-26 23:35:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-26 23:35:57,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:57,815 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:57,816 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:57,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash -638504231, now seen corresponding path program 8 times [2018-10-26 23:35:57,816 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:57,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:57,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:35:57,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:58,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:58,017 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:58,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 23:35:58,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:35:58,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:58,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:58,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:58,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-26 23:35:58,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 23:35:58,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 23:35:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:35:58,081 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 11 states. [2018-10-26 23:35:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:58,199 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-26 23:35:58,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 23:35:58,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-26 23:35:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:58,201 INFO L225 Difference]: With dead ends: 45 [2018-10-26 23:35:58,201 INFO L226 Difference]: Without dead ends: 40 [2018-10-26 23:35:58,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 23:35:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-26 23:35:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2018-10-26 23:35:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-26 23:35:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-26 23:35:58,207 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-10-26 23:35:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:58,208 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-26 23:35:58,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 23:35:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-26 23:35:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-26 23:35:58,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:58,209 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:58,209 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:58,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:58,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1457599581, now seen corresponding path program 9 times [2018-10-26 23:35:58,210 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:58,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:58,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:58,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:58,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:35:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:58,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 23:35:58,409 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 23:35:58,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 23:35:58,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 23:35:58,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:35:58,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:35:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:35:58,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:35:58,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-26 23:35:58,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 23:35:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 23:35:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:35:58,478 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 12 states. [2018-10-26 23:35:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:35:58,562 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-26 23:35:58,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 23:35:58,563 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2018-10-26 23:35:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:35:58,564 INFO L225 Difference]: With dead ends: 47 [2018-10-26 23:35:58,564 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 23:35:58,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:35:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 23:35:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-26 23:35:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 23:35:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-26 23:35:58,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2018-10-26 23:35:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:35:58,569 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-26 23:35:58,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 23:35:58,569 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-26 23:35:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 23:35:58,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:35:58,573 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:35:58,574 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:35:58,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:35:58,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1956746329, now seen corresponding path program 10 times [2018-10-26 23:35:58,574 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 23:35:58,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 23:35:58,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:58,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 23:35:58,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 23:35:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:35:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 23:35:58,607 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 23:35:58,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 11:35:58 BoogieIcfgContainer [2018-10-26 23:35:58,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 23:35:58,631 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 23:35:58,631 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 23:35:58,631 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 23:35:58,631 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:35:55" (3/4) ... [2018-10-26 23:35:58,637 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-10-26 23:35:58,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 23:35:58,638 INFO L168 Benchmark]: Toolchain (without parser) took 3853.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 961.2 MB in the beginning and 916.7 MB in the end (delta: 44.4 MB). Peak memory consumption was 191.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:58,639 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:35:58,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.81 ms. Allocated memory is still 1.0 GB. Free memory was 961.2 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:58,640 INFO L168 Benchmark]: Boogie Preprocessor took 29.20 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:35:58,640 INFO L168 Benchmark]: RCFGBuilder took 278.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 950.4 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:58,641 INFO L168 Benchmark]: TraceAbstraction took 3318.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 916.7 MB in the end (delta: 220.6 MB). Peak memory consumption was 220.6 MB. Max. memory is 11.5 GB. [2018-10-26 23:35:58,641 INFO L168 Benchmark]: Witness Printer took 6.60 ms. Allocated memory is still 1.2 GB. Free memory is still 916.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:35:58,647 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 216.81 ms. Allocated memory is still 1.0 GB. Free memory was 961.2 MB in the beginning and 950.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.20 ms. Allocated memory is still 1.0 GB. Free memory is still 950.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 278.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 950.4 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3318.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 916.7 MB in the end (delta: 220.6 MB). Peak memory consumption was 220.6 MB. Max. memory is 11.5 GB. * Witness Printer took 6.60 ms. Allocated memory is still 1.2 GB. Free memory is still 916.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 4]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAToperation at line 13. Possible FailurePath: [L8] float tick = 1.f / 10.f; [L9] float time = 0.f; [L10] int i; [L12] i = 0 VAL [i=0, time=0] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=0] [L12] i++ VAL [i=1] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=1] [L12] i++ VAL [i=2] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=2] [L12] i++ VAL [i=3] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=3] [L12] i++ VAL [i=4] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=4] [L12] i++ VAL [i=5] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=5] [L12] i++ VAL [i=6] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=6] [L12] i++ VAL [i=7] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=7] [L12] i++ VAL [i=8] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=8] [L12] i++ VAL [i=9] [L12] COND TRUE i < 10 [L13] time += tick VAL [i=9] [L12] i++ VAL [i=10] [L12] COND FALSE !(i < 10) VAL [i=10] [L15] CALL __VERIFIER_assert(time != 1.0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 3.2s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 130 SDtfs, 55 SDslu, 447 SDs, 0 SdLazy, 178 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 530 NumberOfCodeBlocks, 530 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 469 ConstructedInterpolants, 0 QuantifiedInterpolants, 30011 SizeOfPredicates, 9 NumberOfNonLiveVariables, 405 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/900 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-1dbac8b [2018-10-26 23:36:00,882 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 23:36:00,886 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 23:36:00,901 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 23:36:00,902 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 23:36:00,902 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 23:36:00,903 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 23:36:00,905 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 23:36:00,906 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 23:36:00,907 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 23:36:00,908 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 23:36:00,908 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 23:36:00,909 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 23:36:00,910 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 23:36:00,911 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 23:36:00,912 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 23:36:00,912 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 23:36:00,913 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 23:36:00,915 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 23:36:00,917 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 23:36:00,918 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 23:36:00,919 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 23:36:00,921 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 23:36:00,922 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 23:36:00,922 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 23:36:00,923 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 23:36:00,924 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 23:36:00,925 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 23:36:00,926 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 23:36:00,927 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 23:36:00,928 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 23:36:00,928 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 23:36:00,929 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 23:36:00,929 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 23:36:00,930 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 23:36:00,931 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 23:36:00,931 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2018-10-26 23:36:00,945 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 23:36:00,946 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 23:36:00,947 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 23:36:00,947 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 23:36:00,948 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 23:36:00,948 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 23:36:00,948 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 23:36:00,948 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 23:36:00,948 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 23:36:00,949 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 23:36:00,949 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 23:36:00,949 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 23:36:00,949 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 23:36:00,949 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 23:36:00,950 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-10-26 23:36:00,950 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-10-26 23:36:00,950 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 23:36:00,952 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 23:36:00,952 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 23:36:00,952 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 23:36:00,952 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 23:36:00,953 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 23:36:00,953 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 23:36:00,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 23:36:00,953 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 23:36:00,953 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 23:36:00,954 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 23:36:00,954 INFO L133 SettingsManager]: * Trace refinement strategy=WOLF [2018-10-26 23:36:00,954 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 23:36:00,956 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-10-26 23:36:00,956 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-10-26 23:36:00,956 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 -> ebf754a3963f6f2e62a58c5af4648497776f95f2 [2018-10-26 23:36:01,012 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 23:36:01,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 23:36:01,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 23:36:01,034 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 23:36:01,035 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 23:36:01,035 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/../../sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:36:01,084 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/78490c18e/67a02a22fbdb4e958097f4472921de51/FLAG413c80fc2 [2018-10-26 23:36:01,500 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 23:36:01,502 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/sv-benchmarks/c/float-benchs/drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:36:01,509 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/78490c18e/67a02a22fbdb4e958097f4472921de51/FLAG413c80fc2 [2018-10-26 23:36:01,530 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/data/78490c18e/67a02a22fbdb4e958097f4472921de51 [2018-10-26 23:36:01,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 23:36:01,538 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 23:36:01,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 23:36:01,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 23:36:01,548 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 23:36:01,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fe617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01, skipping insertion in model container [2018-10-26 23:36:01,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 23:36:01,588 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 23:36:01,779 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:36:01,785 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 23:36:01,804 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 23:36:01,820 INFO L193 MainTranslator]: Completed translation [2018-10-26 23:36:01,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01 WrapperNode [2018-10-26 23:36:01,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 23:36:01,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 23:36:01,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 23:36:01,822 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 23:36:01,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... [2018-10-26 23:36:01,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 23:36:01,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 23:36:01,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 23:36:01,867 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 23:36:01,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:36:01,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 23:36:01,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 23:36:01,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-26 23:36:01,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 23:36:01,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-10-26 23:36:01,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-26 23:36:01,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 23:36:01,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 23:36:01,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 23:36:02,442 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 23:36:02,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:36:02 BoogieIcfgContainer [2018-10-26 23:36:02,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 23:36:02,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 23:36:02,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 23:36:02,448 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 23:36:02,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:36:01" (1/3) ... [2018-10-26 23:36:02,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b6aa5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:36:02, skipping insertion in model container [2018-10-26 23:36:02,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:36:01" (2/3) ... [2018-10-26 23:36:02,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b6aa5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:36:02, skipping insertion in model container [2018-10-26 23:36:02,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:36:02" (3/3) ... [2018-10-26 23:36:02,452 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth_true-unreach-call_true-termination.c [2018-10-26 23:36:02,464 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 23:36:02,474 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 23:36:02,494 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 23:36:02,529 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 23:36:02,531 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 23:36:02,531 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 23:36:02,531 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 23:36:02,531 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 23:36:02,532 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 23:36:02,532 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 23:36:02,532 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 23:36:02,532 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 23:36:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-26 23:36:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-26 23:36:02,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:36:02,576 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:36:02,578 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:36:02,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:36:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 563245249, now seen corresponding path program 1 times [2018-10-26 23:36:02,590 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:36:02,591 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:36:02,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:36:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:36:02,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:36:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:02,657 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 23:36:02,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:36:02,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 23:36:02,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 23:36:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 23:36:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:36:02,692 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-26 23:36:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:36:02,723 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-10-26 23:36:02,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 23:36:02,725 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-26 23:36:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:36:02,734 INFO L225 Difference]: With dead ends: 32 [2018-10-26 23:36:02,734 INFO L226 Difference]: Without dead ends: 13 [2018-10-26 23:36:02,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 23:36:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-26 23:36:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-26 23:36:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-26 23:36:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-26 23:36:02,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-26 23:36:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:36:02,775 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-26 23:36:02,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 23:36:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-26 23:36:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 23:36:02,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:36:02,776 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:36:02,777 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:36:02,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:36:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -496423, now seen corresponding path program 1 times [2018-10-26 23:36:02,777 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:36:02,778 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:36:02,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:36:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:36:02,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:36:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:02,876 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-10-26 23:36:02,885 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 23:36:02,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 23:36:02,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 23:36:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 23:36:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:36:02,887 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-10-26 23:36:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:36:03,020 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-26 23:36:03,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 23:36:03,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-26 23:36:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:36:03,026 INFO L225 Difference]: With dead ends: 21 [2018-10-26 23:36:03,026 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 23:36:03,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 23:36:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 23:36:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-26 23:36:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-26 23:36:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-26 23:36:03,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-10-26 23:36:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:36:03,033 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-26 23:36:03,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 23:36:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-26 23:36:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-26 23:36:03,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:36:03,034 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:36:03,035 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:36:03,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:36:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1177044387, now seen corresponding path program 1 times [2018-10-26 23:36:03,036 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:36:03,036 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:36:03,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 23:36:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 23:36:03,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:36:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:03,132 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:36:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:03,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:36:03,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-26 23:36:03,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 23:36:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 23:36:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-26 23:36:03,205 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2018-10-26 23:36:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:36:03,359 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-26 23:36:03,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 23:36:03,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-10-26 23:36:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:36:03,365 INFO L225 Difference]: With dead ends: 29 [2018-10-26 23:36:03,365 INFO L226 Difference]: Without dead ends: 24 [2018-10-26 23:36:03,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-26 23:36:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-26 23:36:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-26 23:36:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-26 23:36:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-26 23:36:03,373 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 14 [2018-10-26 23:36:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:36:03,373 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-26 23:36:03,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 23:36:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-26 23:36:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-26 23:36:03,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:36:03,374 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:36:03,377 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:36:03,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:36:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -35450919, now seen corresponding path program 2 times [2018-10-26 23:36:03,378 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:36:03,378 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:36:03,390 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-10-26 23:36:03,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 23:36:03,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:36:03,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:36:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:03,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:36:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:36:03,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:36:03,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-26 23:36:03,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 23:36:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 23:36:03,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-10-26 23:36:03,959 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 12 states. [2018-10-26 23:36:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:36:05,167 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2018-10-26 23:36:05,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 23:36:05,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2018-10-26 23:36:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:36:05,174 INFO L225 Difference]: With dead ends: 47 [2018-10-26 23:36:05,174 INFO L226 Difference]: Without dead ends: 42 [2018-10-26 23:36:05,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2018-10-26 23:36:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-26 23:36:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-26 23:36:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-26 23:36:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-26 23:36:05,188 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 23 [2018-10-26 23:36:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:36:05,189 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-26 23:36:05,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 23:36:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-26 23:36:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-26 23:36:05,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:36:05,193 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:36:05,193 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:36:05,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:36:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1956746329, now seen corresponding path program 3 times [2018-10-26 23:36:05,194 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:36:05,196 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/uautomizer/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2018-10-26 23:36:05,206 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2018-10-26 23:36:05,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-26 23:36:05,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:36:05,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:36:06,024 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-10-26 23:36:07,204 WARN L179 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-26 23:36:08,325 WARN L179 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-26 23:36:14,776 WARN L179 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-26 23:36:29,007 WARN L179 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 18 [2018-10-26 23:36:36,825 WARN L179 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 19 [2018-10-26 23:36:45,922 WARN L179 SmtUtils]: Spent 3.59 s on a formula simplification that was a NOOP. DAG size: 20 [2018-10-26 23:37:15,672 WARN L179 SmtUtils]: Spent 4.54 s on a formula simplification that was a NOOP. DAG size: 21 [2018-10-26 23:37:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 125 refuted. 30 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 23:37:23,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:37:46,862 WARN L179 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-26 23:38:20,584 WARN L179 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 10 [2018-10-26 23:38:24,515 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:19,737 WARN L179 SmtUtils]: Spent 2.68 s on a formula simplification that was a NOOP. DAG size: 12 [2018-10-26 23:39:21,772 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 23:39:23,805 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:25,856 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 23:39:27,899 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:31,810 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:33,860 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 23:39:35,914 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:37,970 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 23:39:40,024 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:42,090 WARN L832 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from false [2018-10-26 23:39:44,148 WARN L854 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) is different from true [2018-10-26 23:39:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 9 refuted. 9 times theorem prover too weak. 0 trivial. 137 not checked. [2018-10-26 23:39:44,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:39:44,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2018-10-26 23:39:44,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 23:39:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 23:39:44,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=310, Unknown=44, NotChecked=308, Total=756 [2018-10-26 23:39:44,211 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 28 states. [2018-10-26 23:39:46,301 WARN L854 $PredicateComparison]: unable to prove that (and (= (_ +zero 8 24) c_main_~time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0)))) is different from true [2018-10-26 23:39:48,367 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (.cse1 ((_ to_fp 11 53) RNE 1.0))) (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE .cse0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) .cse1)) (= (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~time~0) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE .cse0) .cse1)))) is different from false [2018-10-26 23:39:50,431 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (.cse1 ((_ to_fp 11 53) RNE 1.0))) (and (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE .cse0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) .cse1)) (= (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~time~0) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE .cse0) .cse1)))) is different from true [2018-10-26 23:39:52,486 WARN L832 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0)))) is different from false [2018-10-26 23:39:54,543 WARN L854 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0)))) is different from true [2018-10-26 23:39:56,594 WARN L832 $PredicateComparison]: unable to prove that (and (= c_main_~time~0 (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from false [2018-10-26 23:39:58,640 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~time~0 (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-10-26 23:40:06,425 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (.cse1 ((_ to_fp 11 53) RNE 1.0))) (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~time~0) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE .cse0 c_main_~tick~0) c_main_~tick~0)) .cse1)) (not (fp.eq ((_ to_fp 11 53) RNE .cse0) .cse1)))) is different from false [2018-10-26 23:40:08,471 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (.cse1 ((_ to_fp 11 53) RNE 1.0))) (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~time~0) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE .cse0 c_main_~tick~0) c_main_~tick~0)) .cse1)) (not (fp.eq ((_ to_fp 11 53) RNE .cse0) .cse1)))) is different from true [2018-10-26 23:40:11,934 WARN L854 $PredicateComparison]: unable to prove that (and (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~time~0) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0)))) is different from true [2018-10-26 23:40:15,638 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (= c_main_~time~0 (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0)))) is different from true [2018-10-26 23:40:17,695 WARN L854 $PredicateComparison]: unable to prove that (and (= c_main_~tick~0 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0))) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE (fp.add RNE (fp.add RNE c_main_~time~0 c_main_~tick~0) c_main_~tick~0) c_main_~tick~0)) ((_ to_fp 11 53) RNE 1.0))) (= (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~tick~0) c_main_~time~0)) is different from true [2018-10-26 23:40:24,580 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add RNE c_main_~time~0 c_main_~tick~0))) (let ((.cse3 (fp.add RNE .cse0 c_main_~tick~0))) (let ((.cse2 (fp.add RNE .cse3 c_main_~tick~0)) (.cse1 ((_ to_fp 11 53) RNE 1.0))) (and (not (fp.eq ((_ to_fp 11 53) RNE .cse0) .cse1)) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE .cse2 c_main_~tick~0)) .cse1)) (not (fp.eq ((_ to_fp 11 53) RNE .cse3) .cse1)) (not (fp.eq ((_ to_fp 11 53) RNE .cse2) .cse1)) (= (let ((.cse4 (fp.div RNE ((_ to_fp 8 24) RNE 1.0) ((_ to_fp 8 24) RNE 10.0)))) (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (fp.add RNE (_ +zero 8 24) .cse4) .cse4) .cse4) .cse4) .cse4) .cse4) .cse4) .cse4) .cse4) .cse4)) c_main_~time~0))))) is different from true [2018-10-26 23:40:26,619 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse1 (fp.add RNE c_main_~time~0 c_main_~tick~0))) (let ((.cse2 (fp.add RNE .cse1 c_main_~tick~0)) (.cse0 ((_ to_fp 11 53) RNE 1.0))) (and (not (fp.eq ((_ to_fp 11 53) RNE c_main_~time~0) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE .cse1) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE .cse2) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE .cse2 c_main_~tick~0)) .cse0))))) is different from false [2018-10-26 23:40:28,658 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (fp.add RNE c_main_~time~0 c_main_~tick~0))) (let ((.cse2 (fp.add RNE .cse1 c_main_~tick~0)) (.cse0 ((_ to_fp 11 53) RNE 1.0))) (and (not (fp.eq ((_ to_fp 11 53) RNE c_main_~time~0) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE .cse1) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE .cse2) .cse0)) (not (fp.eq ((_ to_fp 11 53) RNE (fp.add RNE .cse2 c_main_~tick~0)) .cse0))))) is different from true [2018-10-26 23:41:32,890 WARN L179 SmtUtils]: Spent 15.17 s on a formula simplification that was a NOOP. DAG size: 17 [2018-10-26 23:42:15,657 WARN L179 SmtUtils]: Spent 4.66 s on a formula simplification that was a NOOP. DAG size: 13 [2018-10-26 23:42:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:42:39,143 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-10-26 23:42:39,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 23:42:39,144 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2018-10-26 23:42:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:42:39,145 INFO L225 Difference]: With dead ends: 63 [2018-10-26 23:42:39,145 INFO L226 Difference]: Without dead ends: 57 [2018-10-26 23:42:39,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 349.4s TimeCoverageRelationStatistics Valid=150, Invalid=395, Unknown=75, NotChecked=1020, Total=1640 [2018-10-26 23:42:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-26 23:42:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-26 23:42:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-26 23:42:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-26 23:42:39,162 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 41 [2018-10-26 23:42:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:42:39,163 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-26 23:42:39,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 23:42:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-26 23:42:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-26 23:42:39,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 23:42:39,165 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 23:42:39,165 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 23:42:39,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 23:42:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash -877060131, now seen corresponding path program 4 times [2018-10-26 23:42:39,166 INFO L225 ckRefinementStrategy]: Switched to mode MATHSAT_FPBP [2018-10-26 23:42:39,166 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cd8f36a8-3dae-4fa9-b3ce-f5c3f96099a1/bin-2019/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 [2018-10-26 23:42:39,171 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 23:42:39,565 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 23:42:39,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 23:42:39,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 23:42:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 160 proven. 155 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-26 23:42:39,746 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 23:42:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 160 proven. 155 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-26 23:42:40,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 23:42:40,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-10-26 23:42:40,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 23:42:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 23:42:40,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-10-26 23:42:40,331 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2018-10-26 23:42:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 23:42:41,461 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-26 23:42:41,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 23:42:41,462 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2018-10-26 23:42:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 23:42:41,463 INFO L225 Difference]: With dead ends: 57 [2018-10-26 23:42:41,463 INFO L226 Difference]: Without dead ends: 0 [2018-10-26 23:42:41,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2018-10-26 23:42:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-26 23:42:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-26 23:42:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-26 23:42:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-26 23:42:41,464 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2018-10-26 23:42:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 23:42:41,464 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-26 23:42:41,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 23:42:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-26 23:42:41,464 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-26 23:42:41,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-26 23:42:42,326 WARN L179 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 7 [2018-10-26 23:48:58,087 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:225) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.checkSat(WrapperScript.java:116) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:122) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:191) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplify(SmtUtils.java:150) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.SmtUtils.simplifyWithStatistics(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeCFGHoareAnnotation(BasicCegarLoop.java:982) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1427) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:630) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:205) ... 31 more [2018-10-26 23:48:58,090 INFO L168 Benchmark]: Toolchain (without parser) took 776553.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.8 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -172.4 MB). Peak memory consumption was 39.5 MB. Max. memory is 11.5 GB. [2018-10-26 23:48:58,091 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 23:48:58,091 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.89 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:48:58,092 INFO L168 Benchmark]: Boogie Preprocessor took 43.33 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 938.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-10-26 23:48:58,092 INFO L168 Benchmark]: RCFGBuilder took 577.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 938.5 MB in the beginning and 1.1 GB in the end (delta: -202.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. [2018-10-26 23:48:58,093 INFO L168 Benchmark]: TraceAbstraction took 775645.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.9 MB). Peak memory consumption was 67.4 MB. Max. memory is 11.5 GB. [2018-10-26 23:48:58,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.89 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 43.33 ms. Allocated memory is still 1.0 GB. Free memory was 943.8 MB in the beginning and 938.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 577.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 938.5 MB in the beginning and 1.1 GB in the end (delta: -202.4 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 775645.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 53.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.9 MB). Peak memory consumption was 67.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:208) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...