./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loop-invgen/nested6_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_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 934ee9c856a834ce808d29dea79c6912619f897f ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 16:53:09,631 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:53:09,632 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:53:09,640 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:53:09,641 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:53:09,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:53:09,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:53:09,643 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:53:09,644 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:53:09,645 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:53:09,646 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:53:09,646 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:53:09,647 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:53:09,647 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:53:09,648 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:53:09,648 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:53:09,649 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:53:09,650 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:53:09,652 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:53:09,653 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:53:09,653 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:53:09,654 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:53:09,656 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:53:09,656 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:53:09,656 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:53:09,657 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:53:09,657 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:53:09,658 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:53:09,658 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:53:09,659 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:53:09,659 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:53:09,660 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:53:09,660 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:53:09,660 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:53:09,661 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:53:09,661 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:53:09,662 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/config/svcomp-Reach-32bit-PetriAutomizer_Default.epf [2018-11-18 16:53:09,671 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:53:09,671 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:53:09,672 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:53:09,672 INFO L133 SettingsManager]: * Process only entry and re-entry procedures=false [2018-11-18 16:53:09,673 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:53:09,673 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:53:09,673 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:53:09,673 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:53:09,673 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:53:09,673 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:53:09,673 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:53:09,674 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:53:09,675 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:53:09,675 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:53:09,675 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:53:09,676 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 16:53:09,676 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:53:09,676 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:53:09,676 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_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 -> 934ee9c856a834ce808d29dea79c6912619f897f [2018-11-18 16:53:09,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:53:09,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:53:09,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:53:09,712 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:53:09,712 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:53:09,712 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-18 16:53:09,751 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/data/b4fc16fa4/f2bd4b07a07d490a8802565de2f59b09/FLAGae0deac5e [2018-11-18 16:53:10,071 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:53:10,072 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-18 16:53:10,076 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/data/b4fc16fa4/f2bd4b07a07d490a8802565de2f59b09/FLAGae0deac5e [2018-11-18 16:53:10,510 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/data/b4fc16fa4/f2bd4b07a07d490a8802565de2f59b09 [2018-11-18 16:53:10,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:53:10,513 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 16:53:10,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:53:10,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:53:10,516 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:53:10,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@801b5bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10, skipping insertion in model container [2018-11-18 16:53:10,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:53:10,539 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:53:10,635 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:53:10,637 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:53:10,647 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:53:10,655 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:53:10,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10 WrapperNode [2018-11-18 16:53:10,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:53:10,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:53:10,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:53:10,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:53:10,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... [2018-11-18 16:53:10,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:53:10,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:53:10,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:53:10,676 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:53:10,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 16:53:10,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:53:10,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:53:10,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 16:53:10,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:53:10,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:53:10,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:53:10,917 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:53:10,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:53:10 BoogieIcfgContainer [2018-11-18 16:53:10,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:53:10,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:53:10,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:53:10,920 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:53:10,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:53:10" (1/3) ... [2018-11-18 16:53:10,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476d73cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:53:10, skipping insertion in model container [2018-11-18 16:53:10,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:53:10" (2/3) ... [2018-11-18 16:53:10,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@476d73cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:53:10, skipping insertion in model container [2018-11-18 16:53:10,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:53:10" (3/3) ... [2018-11-18 16:53:10,923 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-11-18 16:53:10,931 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:53:10,938 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:53:10,951 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:53:10,978 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:53:10,978 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:53:10,978 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:53:10,979 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:53:10,979 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:53:10,979 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:53:10,979 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:53:10,979 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:53:10,979 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:53:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-11-18 16:53:10,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 16:53:11,000 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:53:11,000 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:53:11,002 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:53:11,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:53:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash 416534784, now seen corresponding path program 1 times [2018-11-18 16:53:11,008 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:53:11,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:53:11,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,167 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 16:53:11,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:53:11,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 16:53:11,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:53:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:53:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:53:11,180 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2018-11-18 16:53:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:53:11,256 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2018-11-18 16:53:11,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:53:11,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-11-18 16:53:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:53:11,264 INFO L225 Difference]: With dead ends: 63 [2018-11-18 16:53:11,264 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 16:53:11,267 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:53:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 16:53:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-11-18 16:53:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-18 16:53:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2018-11-18 16:53:11,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2018-11-18 16:53:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:53:11,296 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-11-18 16:53:11,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:53:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2018-11-18 16:53:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 16:53:11,297 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:53:11,297 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:53:11,297 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:53:11,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:53:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1670630326, now seen corresponding path program 1 times [2018-11-18 16:53:11,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:53:11,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:53:11,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,349 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 16:53:11,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:53:11,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 16:53:11,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:53:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:53:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:53:11,352 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2018-11-18 16:53:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:53:11,505 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-11-18 16:53:11,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:53:11,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-11-18 16:53:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:53:11,506 INFO L225 Difference]: With dead ends: 44 [2018-11-18 16:53:11,506 INFO L226 Difference]: Without dead ends: 42 [2018-11-18 16:53:11,507 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:53:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-18 16:53:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2018-11-18 16:53:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 16:53:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-11-18 16:53:11,513 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2018-11-18 16:53:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:53:11,514 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-11-18 16:53:11,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:53:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-11-18 16:53:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 16:53:11,515 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:53:11,515 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:53:11,515 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:53:11,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:53:11,515 INFO L82 PathProgramCache]: Analyzing trace with hash 767827044, now seen corresponding path program 1 times [2018-11-18 16:53:11,515 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:53:11,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:53:11,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:53:11,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:53:11,586 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 16:53:11,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:53:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:53:11,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:53:11,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2018-11-18 16:53:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 16:53:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 16:53:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:53:11,677 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2018-11-18 16:53:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:53:11,784 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2018-11-18 16:53:11,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 16:53:11,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-11-18 16:53:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:53:11,788 INFO L225 Difference]: With dead ends: 62 [2018-11-18 16:53:11,788 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 16:53:11,788 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:53:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 16:53:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-18 16:53:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-18 16:53:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2018-11-18 16:53:11,800 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2018-11-18 16:53:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:53:11,800 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2018-11-18 16:53:11,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 16:53:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2018-11-18 16:53:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-18 16:53:11,801 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:53:11,801 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:53:11,802 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:53:11,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:53:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash -676333797, now seen corresponding path program 1 times [2018-11-18 16:53:11,802 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:53:11,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:53:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:53:11,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:53:11,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 16:53:11,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:11,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:53:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:53:11,973 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:53:11,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2018-11-18 16:53:11,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 16:53:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 16:53:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:53:11,974 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 10 states. [2018-11-18 16:53:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:53:12,212 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2018-11-18 16:53:12,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:53:12,213 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-11-18 16:53:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:53:12,214 INFO L225 Difference]: With dead ends: 157 [2018-11-18 16:53:12,214 INFO L226 Difference]: Without dead ends: 105 [2018-11-18 16:53:12,214 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-18 16:53:12,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-18 16:53:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 66. [2018-11-18 16:53:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 16:53:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2018-11-18 16:53:12,225 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 28 [2018-11-18 16:53:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:53:12,226 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2018-11-18 16:53:12,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 16:53:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2018-11-18 16:53:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 16:53:12,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:53:12,227 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:53:12,227 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:53:12,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:53:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 542199398, now seen corresponding path program 1 times [2018-11-18 16:53:12,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:53:12,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:53:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:12,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:12,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:53:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 16:53:12,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:53:12,300 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/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 16:53:12,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:53:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:53:12,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:53:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:53:12,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:53:12,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-11-18 16:53:12,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 16:53:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 16:53:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-18 16:53:12,371 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 11 states. [2018-11-18 16:53:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:53:12,520 INFO L93 Difference]: Finished difference Result 127 states and 148 transitions. [2018-11-18 16:53:12,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 16:53:12,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2018-11-18 16:53:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:53:12,520 INFO L225 Difference]: With dead ends: 127 [2018-11-18 16:53:12,520 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 16:53:12,521 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-11-18 16:53:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 16:53:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 16:53:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 16:53:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 16:53:12,521 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2018-11-18 16:53:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:53:12,522 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 16:53:12,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 16:53:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 16:53:12,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 16:53:12,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 16:53:12,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:53:12,542 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:53:12,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-18 16:53:12,706 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 16:53:12,707 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:53:12,707 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 16:53:12,707 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 16:53:12,707 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 16:53:12,707 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 16:53:12,707 INFO L421 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 16:53:12,707 INFO L421 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 16:53:12,707 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-11-18 16:53:12,707 INFO L421 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0))) [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 31) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L19-3(lines 19 31) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L421 ceAbstractionStarter]: At program point L19-4(lines 19 31) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 (<= main_~i~0 0) .cse1) (and .cse0 .cse1 (<= main_~n~0 main_~j~0)))) [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 18) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L428 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L425 ceAbstractionStarter]: For program point L20-1(lines 20 30) no Hoare annotation was computed. [2018-11-18 16:53:12,708 INFO L421 ceAbstractionStarter]: At program point L20-3(lines 20 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~k~0 main_~n~0) (<= main_~n~0 main_~k~0)) [2018-11-18 16:53:12,709 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-11-18 16:53:12,709 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-11-18 16:53:12,709 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-11-18 16:53:12,709 INFO L425 ceAbstractionStarter]: For program point L22-1(lines 22 24) no Hoare annotation was computed. [2018-11-18 16:53:12,709 INFO L421 ceAbstractionStarter]: At program point L22-3(lines 22 24) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= .cse0 main_~k~0) (<= main_~k~0 main_~n~0))) [2018-11-18 16:53:12,709 INFO L425 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-18 16:53:12,709 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 16:53:12,709 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 16:53:12,710 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 16:53:12,710 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 16:53:12,710 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 16:53:12,710 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 16:53:12,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:53:12 BoogieIcfgContainer [2018-11-18 16:53:12,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:53:12,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:53:12,721 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:53:12,721 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:53:12,722 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:53:10" (3/4) ... [2018-11-18 16:53:12,724 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 16:53:12,729 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 16:53:12,729 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 16:53:12,729 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 16:53:12,733 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2018-11-18 16:53:12,733 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-18 16:53:12,733 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:53:12,733 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 16:53:12,770 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_cac2df0e-7ce3-447c-9242-ed78f4975d65/bin-2019/uautomizer/witness.graphml [2018-11-18 16:53:12,770 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:53:12,771 INFO L168 Benchmark]: Toolchain (without parser) took 2258.29 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 958.1 MB in the beginning and 844.5 MB in the end (delta: 113.6 MB). Peak memory consumption was 218.4 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,772 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:53:12,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.73 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,773 INFO L168 Benchmark]: Boogie Preprocessor took 19.97 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,773 INFO L168 Benchmark]: RCFGBuilder took 241.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -147.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,774 INFO L168 Benchmark]: TraceAbstraction took 1803.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 847.2 MB in the end (delta: 244.6 MB). Peak memory consumption was 244.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,774 INFO L168 Benchmark]: Witness Printer took 49.50 ms. Allocated memory is still 1.1 GB. Free memory was 847.2 MB in the beginning and 844.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:53:12,783 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 141.73 ms. Allocated memory is still 1.0 GB. Free memory was 958.1 MB in the beginning and 947.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.97 ms. Allocated memory is still 1.0 GB. Free memory was 947.3 MB in the beginning and 944.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 241.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 104.9 MB). Free memory was 944.6 MB in the beginning and 1.1 GB in the end (delta: -147.1 MB). Peak memory consumption was 19.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1803.04 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 847.2 MB in the end (delta: 244.6 MB). Peak memory consumption was 244.6 MB. Max. memory is 11.5 GB. * Witness Printer took 49.50 ms. Allocated memory is still 1.1 GB. Free memory was 847.2 MB in the beginning and 844.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 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: 20]: Loop Invariant Derived loop invariant: (2 * i <= j && k <= n) && n <= k - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((2 * i <= j && j + 1 <= n) && 2 * i <= k) && k <= n - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((k <= n && i <= 0) && n <= k) || ((k <= n && n <= k) && n <= j) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. SAFE Result, 1.7s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 129 SDtfs, 128 SDslu, 543 SDs, 0 SdLazy, 520 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred 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, 46 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 34 PreInvPairs, 54 NumberOfFragments, 117 HoareAnnotationTreeSize, 34 FomulaSimplifications, 899 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 413 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 200 ConstructedInterpolants, 5 QuantifiedInterpolants, 12832 SizeOfPredicates, 9 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 32/40 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...