./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.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 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 0.1.23-0cd3be1 [2018-11-28 12:07:50,735 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:07:50,736 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:07:50,745 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:07:50,745 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:07:50,746 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:07:50,746 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:07:50,748 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:07:50,749 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:07:50,749 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:07:50,750 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:07:50,750 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:07:50,751 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:07:50,751 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:07:50,752 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:07:50,752 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:07:50,752 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:07:50,754 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:07:50,755 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:07:50,755 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:07:50,756 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:07:50,757 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:07:50,758 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:07:50,759 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:07:50,759 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:07:50,759 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:07:50,760 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:07:50,760 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:07:50,761 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:07:50,761 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:07:50,762 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:07:50,762 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:07:50,762 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:07:50,762 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:07:50,763 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:07:50,763 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:07:50,764 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:07:50,771 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:07:50,771 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:07:50,772 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:07:50,772 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:07:50,773 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:07:50,773 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:07:50,773 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:07:50,773 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:07:50,773 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:07:50,774 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:07:50,775 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:07:50,775 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:07:50,775 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:07:50,775 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:07:50,775 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:07:50,775 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:07:50,776 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:07:50,776 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:07:50,777 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:07:50,777 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_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 [2018-11-28 12:07:50,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:07:50,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:07:50,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:07:50,813 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:07:50,813 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:07:50,814 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/../../sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-28 12:07:50,852 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/data/9875fb14c/943eb4b18c6d4740baafa414180a28dc/FLAG33408b073 [2018-11-28 12:07:51,189 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:07:51,190 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/sv-benchmarks/c/loop-invgen/nested6_true-unreach-call_true-termination.i [2018-11-28 12:07:51,194 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/data/9875fb14c/943eb4b18c6d4740baafa414180a28dc/FLAG33408b073 [2018-11-28 12:07:51,619 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/data/9875fb14c/943eb4b18c6d4740baafa414180a28dc [2018-11-28 12:07:51,621 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:07:51,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:07:51,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:07:51,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:07:51,624 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:07:51,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c618031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51, skipping insertion in model container [2018-11-28 12:07:51,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:07:51,641 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:07:51,738 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:07:51,740 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:07:51,751 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:07:51,759 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:07:51,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51 WrapperNode [2018-11-28 12:07:51,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:07:51,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:07:51,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:07:51,760 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:07:51,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:07:51,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:07:51,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:07:51,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:07:51,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... [2018-11-28 12:07:51,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:07:51,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:07:51,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:07:51,785 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:07:51,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 [2018-11-28 12:07:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:07:51,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:07:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:07:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:07:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:07:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:07:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-28 12:07:51,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-28 12:07:51,985 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:07:51,985 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-28 12:07:51,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:07:51 BoogieIcfgContainer [2018-11-28 12:07:51,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:07:51,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:07:51,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:07:51,989 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:07:51,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:07:51" (1/3) ... [2018-11-28 12:07:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dd78f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:07:51, skipping insertion in model container [2018-11-28 12:07:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:07:51" (2/3) ... [2018-11-28 12:07:51,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13dd78f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:07:51, skipping insertion in model container [2018-11-28 12:07:51,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:07:51" (3/3) ... [2018-11-28 12:07:51,993 INFO L112 eAbstractionObserver]: Analyzing ICFG nested6_true-unreach-call_true-termination.i [2018-11-28 12:07:52,002 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:07:52,007 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:07:52,016 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:07:52,041 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:07:52,041 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:07:52,041 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:07:52,042 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:07:52,042 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:07:52,042 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:07:52,042 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:07:52,042 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:07:52,042 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:07:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-11-28 12:07:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 12:07:52,061 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:07:52,061 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:07:52,063 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:07:52,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:07:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1213508388, now seen corresponding path program 1 times [2018-11-28 12:07:52,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:07:52,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:07:52,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:07:52,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:07:52,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:07:52,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:07:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:07:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:07:52,193 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2018-11-28 12:07:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:07:52,253 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2018-11-28 12:07:52,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:07:52,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-11-28 12:07:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:07:52,260 INFO L225 Difference]: With dead ends: 57 [2018-11-28 12:07:52,260 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 12:07:52,262 INFO L631 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 [2018-11-28 12:07:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 12:07:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 12:07:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:07:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2018-11-28 12:07:52,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2018-11-28 12:07:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:07:52,290 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2018-11-28 12:07:52,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:07:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2018-11-28 12:07:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 12:07:52,291 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:07:52,291 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:07:52,291 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:07:52,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:07:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash 542305890, now seen corresponding path program 1 times [2018-11-28 12:07:52,292 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:07:52,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:07:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:07:52,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:07:52,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:07:52,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:07:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:07:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:07:52,351 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2018-11-28 12:07:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:07:52,463 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-11-28 12:07:52,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:07:52,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-11-28 12:07:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:07:52,464 INFO L225 Difference]: With dead ends: 40 [2018-11-28 12:07:52,465 INFO L226 Difference]: Without dead ends: 38 [2018-11-28 12:07:52,465 INFO L631 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 [2018-11-28 12:07:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-28 12:07:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2018-11-28 12:07:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-28 12:07:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2018-11-28 12:07:52,471 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2018-11-28 12:07:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:07:52,472 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2018-11-28 12:07:52,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:07:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2018-11-28 12:07:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-28 12:07:52,472 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:07:52,472 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:07:52,473 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:07:52,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:07:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1063580357, now seen corresponding path program 1 times [2018-11-28 12:07:52,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:07:52,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:07:52,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:07:52,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:07:52,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 [2018-11-28 12:07:52,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:07:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:07:52,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:07:52,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2018-11-28 12:07:52,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:07:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:07:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:07:52,611 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2018-11-28 12:07:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:07:52,691 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-11-28 12:07:52,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:07:52,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2018-11-28 12:07:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:07:52,693 INFO L225 Difference]: With dead ends: 55 [2018-11-28 12:07:52,693 INFO L226 Difference]: Without dead ends: 53 [2018-11-28 12:07:52,694 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:07:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-28 12:07:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-11-28 12:07:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-28 12:07:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2018-11-28 12:07:52,704 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 20 [2018-11-28 12:07:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:07:52,704 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2018-11-28 12:07:52,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:07:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2018-11-28 12:07:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-28 12:07:52,705 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:07:52,706 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:07:52,706 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:07:52,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:07:52,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1462671860, now seen corresponding path program 1 times [2018-11-28 12:07:52,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:07:52,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:07:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:07:52,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:07:52,774 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 [2018-11-28 12:07:52,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:52,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:07:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:07:52,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 12:07:52,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2018-11-28 12:07:52,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:07:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:07:52,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:07:52,906 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 10 states. [2018-11-28 12:07:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:07:53,166 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2018-11-28 12:07:53,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:07:53,166 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-11-28 12:07:53,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:07:53,167 INFO L225 Difference]: With dead ends: 133 [2018-11-28 12:07:53,167 INFO L226 Difference]: Without dead ends: 88 [2018-11-28 12:07:53,168 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:07:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-28 12:07:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2018-11-28 12:07:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-28 12:07:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2018-11-28 12:07:53,180 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 24 [2018-11-28 12:07:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:07:53,180 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2018-11-28 12:07:53,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:07:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2018-11-28 12:07:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-28 12:07:53,181 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:07:53,181 INFO L402 BasicCegarLoop]: trace histogram [3, 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] [2018-11-28 12:07:53,182 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:07:53,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:07:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1830678608, now seen corresponding path program 1 times [2018-11-28 12:07:53,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:07:53,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:07:53,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:53,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:53,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:07:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-28 12:07:53,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:07:53,233 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/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 [2018-11-28 12:07:53,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:07:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:07:53,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:07:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 12:07:53,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:07:53,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-11-28 12:07:53,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:07:53,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:07:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:07:53,310 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 11 states. [2018-11-28 12:07:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:07:53,433 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2018-11-28 12:07:53,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:07:53,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-11-28 12:07:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:07:53,434 INFO L225 Difference]: With dead ends: 107 [2018-11-28 12:07:53,435 INFO L226 Difference]: Without dead ends: 0 [2018-11-28 12:07:53,435 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-11-28 12:07:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-28 12:07:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-28 12:07:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-28 12:07:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-28 12:07:53,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2018-11-28 12:07:53,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:07:53,437 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 12:07:53,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:07:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-28 12:07:53,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-28 12:07:53,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-28 12:07:53,456 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 12:07:53,475 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 12:07:53,476 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-28 12:07:53,632 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-28 12:07:53,632 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:07:53,632 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-28 12:07:53,633 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-28 12:07:53,633 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-28 12:07:53,633 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-28 12:07:53,633 INFO L444 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)) [2018-11-28 12:07:53,633 INFO L444 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)) [2018-11-28 12:07:53,633 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 34) no Hoare annotation was computed. [2018-11-28 12:07:53,633 INFO L444 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))) [2018-11-28 12:07:53,634 INFO L448 ceAbstractionStarter]: For program point L23-1(lines 22 24) no Hoare annotation was computed. [2018-11-28 12:07:53,634 INFO L448 ceAbstractionStarter]: For program point L19-2(lines 19 31) no Hoare annotation was computed. [2018-11-28 12:07:53,634 INFO L444 ceAbstractionStarter]: At program point L19-3(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)))) [2018-11-28 12:07:53,634 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 18) no Hoare annotation was computed. [2018-11-28 12:07:53,634 INFO L448 ceAbstractionStarter]: For program point L15-1(lines 15 18) no Hoare annotation was computed. [2018-11-28 12:07:53,634 INFO L451 ceAbstractionStarter]: At program point L32(lines 10 34) the Hoare annotation is: true [2018-11-28 12:07:53,634 INFO L448 ceAbstractionStarter]: For program point L28(lines 20 30) no Hoare annotation was computed. [2018-11-28 12:07:53,634 INFO L444 ceAbstractionStarter]: At program point L20-2(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)) [2018-11-28 12:07:53,636 INFO L448 ceAbstractionStarter]: For program point L21(lines 21 29) no Hoare annotation was computed. [2018-11-28 12:07:53,636 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 34) no Hoare annotation was computed. [2018-11-28 12:07:53,636 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 34) the Hoare annotation is: true [2018-11-28 12:07:53,636 INFO L444 ceAbstractionStarter]: At program point L22-2(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))) [2018-11-28 12:07:53,636 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-28 12:07:53,636 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-28 12:07:53,637 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-28 12:07:53,637 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-28 12:07:53,637 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-28 12:07:53,637 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-28 12:07:53,637 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-28 12:07:53,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:07:53 BoogieIcfgContainer [2018-11-28 12:07:53,649 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:07:53,650 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:07:53,650 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:07:53,650 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:07:53,651 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:07:51" (3/4) ... [2018-11-28 12:07:53,654 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-28 12:07:53,660 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-28 12:07:53,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-28 12:07:53,661 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-28 12:07:53,665 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-28 12:07:53,665 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-11-28 12:07:53,665 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:07:53,665 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-28 12:07:53,698 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_27f73fe5-37a4-4fe0-b855-c0d3b51b71fc/bin-2019/uautomizer/witness.graphml [2018-11-28 12:07:53,698 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:07:53,699 INFO L168 Benchmark]: Toolchain (without parser) took 2077.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 953.3 MB in the beginning and 865.1 MB in the end (delta: 88.2 MB). Peak memory consumption was 213.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:07:53,700 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:07:53,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 137.76 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-28 12:07:53,700 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:07:53,700 INFO L168 Benchmark]: Boogie Preprocessor took 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:07:53,701 INFO L168 Benchmark]: RCFGBuilder took 200.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:07:53,701 INFO L168 Benchmark]: TraceAbstraction took 1663.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 869.1 MB in the end (delta: 236.7 MB). Peak memory consumption was 236.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:07:53,701 INFO L168 Benchmark]: Witness Printer took 48.25 ms. Allocated memory is still 1.2 GB. Free memory was 869.1 MB in the beginning and 865.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:07:53,704 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 137.76 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.66 ms. Allocated memory is still 1.0 GB. Free memory is still 942.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 200.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 942.5 MB in the beginning and 1.1 GB in the end (delta: -163.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1663.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 869.1 MB in the end (delta: 236.7 MB). Peak memory consumption was 236.7 MB. Max. memory is 11.5 GB. * Witness Printer took 48.25 ms. Allocated memory is still 1.2 GB. Free memory was 869.1 MB in the beginning and 865.1 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 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: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: ((k <= n && i <= 0) && n <= k) || ((k <= n && n <= k) && n <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 110 SDtfs, 102 SDslu, 419 SDs, 0 SdLazy, 503 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 38 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, 181 NumberOfCodeBlocks, 181 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 173 ConstructedInterpolants, 3 QuantifiedInterpolants, 8785 SizeOfPredicates, 9 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 27/34 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...