./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 43bf08ab7eab650af2134651dc434d79e4859447 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:14:23,640 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:14:23,641 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:14:23,648 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:14:23,648 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:14:23,649 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:14:23,649 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:14:23,651 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:14:23,652 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:14:23,652 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:14:23,653 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:14:23,653 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:14:23,654 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:14:23,654 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:14:23,655 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:14:23,655 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:14:23,656 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:14:23,657 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:14:23,658 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:14:23,659 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:14:23,659 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:14:23,660 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:14:23,661 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:14:23,661 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:14:23,661 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:14:23,662 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:14:23,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:14:23,663 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:14:23,664 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:14:23,664 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:14:23,665 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:14:23,665 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:14:23,665 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:14:23,665 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:14:23,666 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:14:23,666 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:14:23,667 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 15:14:23,674 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:14:23,674 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:14:23,674 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:14:23,675 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 15:14:23,675 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 15:14:23,675 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 15:14:23,675 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 15:14:23,676 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:14:23,676 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:14:23,677 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:14:23,677 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:14:23,678 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:14:23,678 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:14:23,678 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_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 -> 43bf08ab7eab650af2134651dc434d79e4859447 [2018-11-18 15:14:23,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:14:23,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:14:23,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:14:23,715 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:14:23,715 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:14:23,716 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/../../sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i [2018-11-18 15:14:23,755 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/data/ae91043b5/c40924be50ef437ea832608effe1540a/FLAGde51ffa83 [2018-11-18 15:14:24,137 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:14:24,138 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/sv-benchmarks/c/loop-new/count_by_1_true-unreach-call_true-termination.i [2018-11-18 15:14:24,141 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/data/ae91043b5/c40924be50ef437ea832608effe1540a/FLAGde51ffa83 [2018-11-18 15:14:24,151 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/data/ae91043b5/c40924be50ef437ea832608effe1540a [2018-11-18 15:14:24,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:14:24,156 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 15:14:24,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:14:24,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:14:24,159 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:14:24,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91c03ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24, skipping insertion in model container [2018-11-18 15:14:24,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:14:24,179 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:14:24,275 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:14:24,277 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:14:24,285 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:14:24,293 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:14:24,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24 WrapperNode [2018-11-18 15:14:24,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:14:24,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:14:24,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:14:24,294 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:14:24,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... [2018-11-18 15:14:24,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:14:24,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:14:24,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:14:24,312 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:14:24,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 [2018-11-18 15:14:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:14:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:14:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 15:14:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:14:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:14:24,496 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:14:24,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:14:24 BoogieIcfgContainer [2018-11-18 15:14:24,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:14:24,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:14:24,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:14:24,499 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:14:24,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:14:24" (1/3) ... [2018-11-18 15:14:24,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216eb6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:14:24, skipping insertion in model container [2018-11-18 15:14:24,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:14:24" (2/3) ... [2018-11-18 15:14:24,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216eb6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:14:24, skipping insertion in model container [2018-11-18 15:14:24,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:14:24" (3/3) ... [2018-11-18 15:14:24,502 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_1_true-unreach-call_true-termination.i [2018-11-18 15:14:24,509 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:14:24,515 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:14:24,527 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:14:24,551 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 15:14:24,551 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:14:24,551 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:14:24,552 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:14:24,552 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:14:24,552 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:14:24,552 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:14:24,552 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:14:24,552 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:14:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-18 15:14:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 15:14:24,572 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:14:24,572 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:14:24,574 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:14:24,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:14:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash 563245249, now seen corresponding path program 1 times [2018-11-18 15:14:24,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:14:24,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:14:24,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:14:24,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:14:24,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:14:24,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 15:14:24,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 15:14:24,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:14:24,669 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-18 15:14:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:14:24,682 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2018-11-18 15:14:24,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 15:14:24,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 15:14:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:14:24,689 INFO L225 Difference]: With dead ends: 32 [2018-11-18 15:14:24,689 INFO L226 Difference]: Without dead ends: 13 [2018-11-18 15:14:24,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:14:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-18 15:14:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-18 15:14:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-18 15:14:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-18 15:14:24,714 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-11-18 15:14:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:14:24,714 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-18 15:14:24,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 15:14:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-18 15:14:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 15:14:24,715 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:14:24,715 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:14:24,715 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:14:24,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:14:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash -496423, now seen corresponding path program 1 times [2018-11-18 15:14:24,716 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:14:24,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:14:24,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:14:24,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,745 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:14:24,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 15:14:24,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 15:14:24,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 15:14:24,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:14:24,747 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-11-18 15:14:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:14:24,762 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-18 15:14:24,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 15:14:24,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 15:14:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:14:24,762 INFO L225 Difference]: With dead ends: 21 [2018-11-18 15:14:24,763 INFO L226 Difference]: Without dead ends: 16 [2018-11-18 15:14:24,763 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:14:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-18 15:14:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-11-18 15:14:24,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 15:14:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-18 15:14:24,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-11-18 15:14:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:14:24,766 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-18 15:14:24,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 15:14:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-18 15:14:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 15:14:24,766 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:14:24,766 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:14:24,766 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:14:24,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:14:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1177044387, now seen corresponding path program 1 times [2018-11-18 15:14:24,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:14:24,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:14:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:14:24,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:14:24,787 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 [2018-11-18 15:14:24,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:14:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:24,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:14:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:14:24,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-18 15:14:24,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 15:14:24,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 15:14:24,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 15:14:24,840 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-11-18 15:14:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:14:24,860 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-11-18 15:14:24,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:14:24,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-11-18 15:14:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:14:24,861 INFO L225 Difference]: With dead ends: 24 [2018-11-18 15:14:24,861 INFO L226 Difference]: Without dead ends: 19 [2018-11-18 15:14:24,862 INFO L604 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 [2018-11-18 15:14:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-18 15:14:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-11-18 15:14:24,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 15:14:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 15:14:24,865 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-11-18 15:14:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:14:24,865 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 15:14:24,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 15:14:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 15:14:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 15:14:24,866 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:14:24,866 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:14:24,866 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:14:24,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:14:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash -489337255, now seen corresponding path program 2 times [2018-11-18 15:14:24,866 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:14:24,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:14:24,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:14:24,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:14:24,922 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 [2018-11-18 15:14:24,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 15:14:24,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 15:14:24,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:14:24,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:14:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:24,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 15:14:24,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-18 15:14:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:14:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:14:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-18 15:14:24,968 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-11-18 15:14:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:14:24,983 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-11-18 15:14:24,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 15:14:24,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 15:14:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:14:24,984 INFO L225 Difference]: With dead ends: 27 [2018-11-18 15:14:24,984 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 15:14:24,985 INFO L604 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 [2018-11-18 15:14:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 15:14:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-11-18 15:14:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-18 15:14:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-18 15:14:24,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-11-18 15:14:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:14:24,989 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-18 15:14:24,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:14:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-18 15:14:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-18 15:14:24,989 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:14:24,989 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:14:24,989 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:14:24,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:14:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash -169763, now seen corresponding path program 3 times [2018-11-18 15:14:24,989 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 15:14:24,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 15:14:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 15:14:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:14:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:14:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:14:25,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:14:25,044 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/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 [2018-11-18 15:14:25,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:14:25,074 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 15:14:25,074 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:14:25,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:14:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 15:14:25,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:14:25,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-18 15:14:25,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 15:14:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 15:14:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-18 15:14:25,160 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-11-18 15:14:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:14:25,202 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-11-18 15:14:25,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 15:14:25,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-11-18 15:14:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:14:25,202 INFO L225 Difference]: With dead ends: 30 [2018-11-18 15:14:25,202 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:14:25,203 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-11-18 15:14:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:14:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:14:25,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:14:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:14:25,203 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-11-18 15:14:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:14:25,204 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:14:25,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 15:14:25,204 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:14:25,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:14:25,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:14:25,236 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 15:14:25,236 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:14:25,236 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:14:25,236 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:14:25,236 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 15) the Hoare annotation is: true [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 15) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 15) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point L12-1(line 12) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L425 ceAbstractionStarter]: For program point L12-3(line 12) no Hoare annotation was computed. [2018-11-18 15:14:25,237 INFO L421 ceAbstractionStarter]: At program point L12-4(line 12) the Hoare annotation is: (<= main_~i~0 1000000) [2018-11-18 15:14:25,237 INFO L421 ceAbstractionStarter]: At program point L12-5(line 12) the Hoare annotation is: (and (<= main_~i~0 1000000) (<= 1000000 main_~i~0)) [2018-11-18 15:14:25,237 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 15:14:25,238 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 15:14:25,238 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 15:14:25,238 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 15:14:25,238 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 15:14:25,238 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 15:14:25,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:14:25 BoogieIcfgContainer [2018-11-18 15:14:25,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:14:25,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:14:25,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:14:25,247 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:14:25,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:14:24" (3/4) ... [2018-11-18 15:14:25,249 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:14:25,253 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:14:25,253 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:14:25,253 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 15:14:25,255 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 15:14:25,256 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 15:14:25,256 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:14:25,281 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d30851c5-dd6c-4d56-a794-4e3f7c5a777e/bin-2019/uautomizer/witness.graphml [2018-11-18 15:14:25,281 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:14:25,281 INFO L168 Benchmark]: Toolchain (without parser) took 1126.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 963.0 MB in the beginning and 1.0 GB in the end (delta: -75.2 MB). Peak memory consumption was 61.1 MB. Max. memory is 11.5 GB. [2018-11-18 15:14:25,282 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:14:25,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.05 ms. Allocated memory is still 1.0 GB. Free memory was 963.0 MB in the beginning and 951.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:14:25,283 INFO L168 Benchmark]: Boogie Preprocessor took 17.78 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:14:25,283 INFO L168 Benchmark]: RCFGBuilder took 185.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:14:25,283 INFO L168 Benchmark]: TraceAbstraction took 749.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.7 MB). Peak memory consumption was 80.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:14:25,283 INFO L168 Benchmark]: Witness Printer took 34.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 15:14:25,285 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 137.05 ms. Allocated memory is still 1.0 GB. Free memory was 963.0 MB in the beginning and 951.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.78 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 185.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 749.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.7 MB). Peak memory consumption was 80.7 MB. Max. memory is 11.5 GB. * Witness Printer took 34.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: i <= 1000000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 0.6s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 60 SDtfs, 23 SDslu, 83 SDs, 0 SdLazy, 49 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=4, 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, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 15 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 123 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 3287 SizeOfPredicates, 4 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 15/48 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...