./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive-simple/id2_i5_o5_true-unreach-call_true-termination.c --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_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_i5_o5_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9448a6696b4991e038dda55623feb6ffc9366da0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:05:59,635 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:05:59,636 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:05:59,643 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:05:59,643 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:05:59,644 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:05:59,645 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:05:59,646 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:05:59,648 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:05:59,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:05:59,649 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:05:59,649 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:05:59,650 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:05:59,651 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:05:59,652 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:05:59,653 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:05:59,653 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:05:59,655 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:05:59,656 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:05:59,658 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:05:59,659 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:05:59,660 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:05:59,661 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:05:59,662 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:05:59,662 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:05:59,663 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:05:59,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:05:59,664 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:05:59,665 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:05:59,666 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:05:59,666 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:05:59,667 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:05:59,667 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:05:59,667 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:05:59,668 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:05:59,668 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:05:59,669 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 10:05:59,679 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:05:59,679 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:05:59,680 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:05:59,680 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:05:59,680 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:05:59,680 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:05:59,681 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:05:59,682 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:05:59,682 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:05:59,682 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:05:59,682 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:05:59,683 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:05:59,684 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:05:59,684 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:05:59,684 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:05:59,684 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:05:59,684 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:05:59,684 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:05:59,685 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan 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 -> Taipan 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 -> 9448a6696b4991e038dda55623feb6ffc9366da0 [2018-11-18 10:05:59,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:05:59,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:05:59,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:05:59,723 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:05:59,723 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:05:59,723 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id2_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:05:59,763 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/data/fcc77346e/5540fbcaa73c4d27a6c45eb704f2d71d/FLAGe059d9f1e [2018-11-18 10:06:00,104 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:06:00,105 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/sv-benchmarks/c/recursive-simple/id2_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:06:00,109 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/data/fcc77346e/5540fbcaa73c4d27a6c45eb704f2d71d/FLAGe059d9f1e [2018-11-18 10:06:00,118 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/data/fcc77346e/5540fbcaa73c4d27a6c45eb704f2d71d [2018-11-18 10:06:00,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:06:00,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:06:00,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:06:00,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:06:00,125 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:06:00,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e779c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00, skipping insertion in model container [2018-11-18 10:06:00,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:06:00,144 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:06:00,250 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:06:00,252 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:06:00,260 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:06:00,269 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:06:00,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00 WrapperNode [2018-11-18 10:06:00,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:06:00,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:06:00,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:06:00,270 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:06:00,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:06:00,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:06:00,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:06:00,282 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:06:00,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... [2018-11-18 10:06:00,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:06:00,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:06:00,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:06:00,293 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:06:00,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/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 10:06:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:06:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:06:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-11-18 10:06:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-11-18 10:06:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:06:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:06:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:06:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:06:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:06:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:06:00,500 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:06:00,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:00 BoogieIcfgContainer [2018-11-18 10:06:00,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:06:00,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:06:00,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:06:00,503 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:06:00,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:06:00" (1/3) ... [2018-11-18 10:06:00,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f37b808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:06:00, skipping insertion in model container [2018-11-18 10:06:00,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:00" (2/3) ... [2018-11-18 10:06:00,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f37b808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:06:00, skipping insertion in model container [2018-11-18 10:06:00,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:00" (3/3) ... [2018-11-18 10:06:00,506 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_i5_o5_true-unreach-call_true-termination.c [2018-11-18 10:06:00,514 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:06:00,520 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 10:06:00,535 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 10:06:00,562 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:06:00,562 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:06:00,562 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:06:00,562 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:06:00,562 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:06:00,563 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:06:00,563 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:06:00,563 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:06:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2018-11-18 10:06:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 10:06:00,582 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:00,582 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:00,584 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:00,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2018-11-18 10:06:00,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:00,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:00,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,620 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:00,716 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 10:06:00,718 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:00,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:06:00,718 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:00,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:06:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:06:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:06:00,730 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2018-11-18 10:06:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:00,805 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-11-18 10:06:00,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:06:00,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 10:06:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:00,814 INFO L225 Difference]: With dead ends: 36 [2018-11-18 10:06:00,815 INFO L226 Difference]: Without dead ends: 24 [2018-11-18 10:06:00,817 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 10:06:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-18 10:06:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-18 10:06:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-18 10:06:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-18 10:06:00,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2018-11-18 10:06:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:00,846 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-18 10:06:00,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:06:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-18 10:06:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 10:06:00,847 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:00,847 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 10:06:00,847 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:00,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:00,848 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2018-11-18 10:06:00,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:00,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:00,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,849 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:00,907 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 10:06:00,908 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:00,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 10:06:00,908 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:00,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 10:06:00,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 10:06:00,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 10:06:00,910 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2018-11-18 10:06:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:00,975 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-11-18 10:06:00,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:06:00,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-18 10:06:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:00,977 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:06:00,977 INFO L226 Difference]: Without dead ends: 29 [2018-11-18 10:06:00,978 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 10:06:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-18 10:06:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-18 10:06:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 10:06:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 10:06:00,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2018-11-18 10:06:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:00,983 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 10:06:00,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 10:06:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 10:06:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:06:00,984 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:00,984 INFO L375 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, 1] [2018-11-18 10:06:00,984 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:00,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2018-11-18 10:06:00,984 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:00,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:00,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:00,986 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:06:01,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:01,061 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:01,062 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 10:06:01,063 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [8], [12], [14], [17], [19], [25], [28], [29], [31], [32], [33], [34], [35], [36], [37], [39], [40], [41], [42] [2018-11-18 10:06:01,085 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:06:01,085 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:06:01,199 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:06:01,201 INFO L272 AbstractInterpreter]: Visited 23 different actions 67 times. Never merged. Widened at 2 different actions 4 times. Performed 142 root evaluator evaluations with a maximum evaluation depth of 3. Performed 142 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 10:06:01,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:01,213 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:06:01,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:01,214 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/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 10:06:01,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:01,220 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:06:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:01,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:06:01,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 10:06:01,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:06:01,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2018-11-18 10:06:01,564 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:06:01,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 10:06:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:06:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:06:01,565 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-11-18 10:06:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:01,622 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-11-18 10:06:01,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:06:01,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-11-18 10:06:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:01,623 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:06:01,623 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 10:06:01,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:06:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 10:06:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-11-18 10:06:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-18 10:06:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-11-18 10:06:01,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-11-18 10:06:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:01,629 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-11-18 10:06:01,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 10:06:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-11-18 10:06:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 10:06:01,630 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:01,631 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:01,631 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:01,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2018-11-18 10:06:01,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:01,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:01,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:01,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:01,632 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:06:01,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:01,702 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:01,702 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-18 10:06:01,703 INFO L202 CegarAbsIntRunner]: [0], [1], [4], [5], [7], [8], [12], [14], [17], [19], [25], [29], [31], [32], [33], [34], [35], [36], [37], [39], [40], [41], [42] [2018-11-18 10:06:01,704 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:06:01,704 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:06:01,769 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:06:01,769 INFO L272 AbstractInterpreter]: Visited 23 different actions 82 times. Merged at 8 different actions 19 times. Widened at 2 different actions 4 times. Performed 230 root evaluator evaluations with a maximum evaluation depth of 3. Performed 230 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-18 10:06:01,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:01,774 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:06:01,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:01,775 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/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 10:06:01,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:01,789 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:06:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:01,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-18 10:06:01,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:06:02,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:06:02,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 14 [2018-11-18 10:06:02,118 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:06:02,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:06:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:06:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:06:02,119 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2018-11-18 10:06:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:02,178 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-11-18 10:06:02,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 10:06:02,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2018-11-18 10:06:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:02,179 INFO L225 Difference]: With dead ends: 45 [2018-11-18 10:06:02,179 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 10:06:02,180 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-18 10:06:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 10:06:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2018-11-18 10:06:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-18 10:06:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-18 10:06:02,185 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2018-11-18 10:06:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:02,186 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-18 10:06:02,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:06:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-18 10:06:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 10:06:02,187 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:02,187 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:02,187 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:02,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:02,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2018-11-18 10:06:02,187 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:02,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:02,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:02,188 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 10:06:02,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:02,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:02,242 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:06:02,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:06:02,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:02,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/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 10:06:02,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:06:02,248 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:06:02,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 10:06:02,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:06:02,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 10:06:02,283 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 10:06:02,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:06:02,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 15 [2018-11-18 10:06:02,733 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:06:02,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 10:06:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:06:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:06:02,734 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2018-11-18 10:06:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:02,817 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-11-18 10:06:02,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-18 10:06:02,818 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-18 10:06:02,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:02,819 INFO L225 Difference]: With dead ends: 51 [2018-11-18 10:06:02,819 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 10:06:02,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-11-18 10:06:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 10:06:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2018-11-18 10:06:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-18 10:06:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-11-18 10:06:02,824 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2018-11-18 10:06:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:02,824 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-11-18 10:06:02,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 10:06:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-11-18 10:06:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-18 10:06:02,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:02,825 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:02,826 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:02,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:02,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2018-11-18 10:06:02,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:02,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:06:02,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:02,827 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 10:06:02,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:02,961 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:02,961 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:06:02,962 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:06:02,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:02,962 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:06:02,975 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 10:06:02,975 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 10:06:02,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 10:06:02,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:06:02,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 10:06:03,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-18 10:06:03,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:06:03,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2018-11-18 10:06:03,208 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:06:03,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-18 10:06:03,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-18 10:06:03,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:06:03,209 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2018-11-18 10:06:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:03,288 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-11-18 10:06:03,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-18 10:06:03,288 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-11-18 10:06:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:03,289 INFO L225 Difference]: With dead ends: 57 [2018-11-18 10:06:03,289 INFO L226 Difference]: Without dead ends: 53 [2018-11-18 10:06:03,290 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-18 10:06:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-18 10:06:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2018-11-18 10:06:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 10:06:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-11-18 10:06:03,301 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2018-11-18 10:06:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:03,301 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-11-18 10:06:03,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-18 10:06:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-11-18 10:06:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-18 10:06:03,304 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:03,305 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:03,305 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:03,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash 706413819, now seen corresponding path program 3 times [2018-11-18 10:06:03,305 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:03,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:03,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:06:03,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:03,306 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 10:06:03,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:03,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-11-18 10:06:03,398 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:03,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 10:06:03,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 10:06:03,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-18 10:06:03,399 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2018-11-18 10:06:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:03,477 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-11-18 10:06:03,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:06:03,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2018-11-18 10:06:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:03,477 INFO L225 Difference]: With dead ends: 63 [2018-11-18 10:06:03,478 INFO L226 Difference]: Without dead ends: 39 [2018-11-18 10:06:03,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-18 10:06:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-18 10:06:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-18 10:06:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 10:06:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-18 10:06:03,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 49 [2018-11-18 10:06:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:03,481 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-18 10:06:03,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 10:06:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-18 10:06:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 10:06:03,482 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:03,482 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:03,482 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 10:06:03,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1492956279, now seen corresponding path program 3 times [2018-11-18 10:06:03,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:03,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:03,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:06:03,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:03,483 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-18 10:06:03,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:03,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:03,639 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 10:06:03,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 10:06:03,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:03,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:06:03,650 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 10:06:03,650 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 10:06:03,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 10:06:03,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:06:03,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2018-11-18 10:06:03,780 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 10:06:04,999 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:06:04,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13, 19] total 33 [2018-11-18 10:06:04,999 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:04,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 10:06:04,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 10:06:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2018-11-18 10:06:05,000 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-11-18 10:06:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:05,091 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-11-18 10:06:05,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-18 10:06:05,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2018-11-18 10:06:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:05,092 INFO L225 Difference]: With dead ends: 39 [2018-11-18 10:06:05,092 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:06:05,093 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 10:06:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:06:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:06:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:06:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:06:05,094 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2018-11-18 10:06:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:05,094 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:06:05,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 10:06:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:06:05,094 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:06:05,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:06:05,122 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:06:05,122 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L421 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= |id2_#in~x| id2_~x) (<= id2_~x |id2_#in~x|)) [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L428 ceAbstractionStarter]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:06:05,123 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 17 23) the Hoare annotation is: true [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 17 23) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L20(lines 20 22) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L421 ceAbstractionStarter]: At program point L19(line 19) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2018-11-18 10:06:05,123 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2018-11-18 10:06:05,124 INFO L421 ceAbstractionStarter]: At program point L9(line 9) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2018-11-18 10:06:05,124 INFO L425 ceAbstractionStarter]: For program point L8(line 8) no Hoare annotation was computed. [2018-11-18 10:06:05,124 INFO L425 ceAbstractionStarter]: For program point L9-1(line 9) no Hoare annotation was computed. [2018-11-18 10:06:05,124 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2018-11-18 10:06:05,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:06:05 BoogieIcfgContainer [2018-11-18 10:06:05,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:06:05,126 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:06:05,126 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:06:05,126 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:06:05,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:00" (3/4) ... [2018-11-18 10:06:05,129 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:06:05,133 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:06:05,133 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2018-11-18 10:06:05,133 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:06:05,133 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 10:06:05,136 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:06:05,136 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:06:05,136 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:06:05,161 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_34f7ca1e-a93b-4b3e-99b7-76b54b8e7007/bin-2019/utaipan/witness.graphml [2018-11-18 10:06:05,161 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:06:05,161 INFO L168 Benchmark]: Toolchain (without parser) took 5040.36 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 297.3 MB). Free memory was 957.0 MB in the beginning and 955.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 299.2 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,162 INFO L168 Benchmark]: CDTParser took 0.18 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 10:06:05,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 147.07 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 946.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.49 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:06:05,163 INFO L168 Benchmark]: Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.0 GB. Free memory was 946.2 MB in the beginning and 943.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,163 INFO L168 Benchmark]: RCFGBuilder took 206.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -162.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,163 INFO L168 Benchmark]: TraceAbstraction took 4624.32 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 962.4 MB in the end (delta: 143.2 MB). Peak memory consumption was 317.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,164 INFO L168 Benchmark]: Witness Printer took 35.06 ms. Allocated memory is still 1.3 GB. Free memory was 962.4 MB in the beginning and 955.1 MB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:05,165 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 147.07 ms. Allocated memory is still 1.0 GB. Free memory was 957.0 MB in the beginning and 946.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.49 ms. Allocated memory is still 1.0 GB. Free memory is still 946.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.82 ms. Allocated memory is still 1.0 GB. Free memory was 946.2 MB in the beginning and 943.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 206.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.2 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -162.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4624.32 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 174.1 MB). Free memory was 1.1 GB in the beginning and 962.4 MB in the end (delta: 143.2 MB). Peak memory consumption was 317.3 MB. Max. memory is 11.5 GB. * Witness Printer took 35.06 ms. Allocated memory is still 1.3 GB. Free memory was 962.4 MB in the beginning and 955.1 MB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. SAFE Result, 4.5s OverallTime, 8 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 179 SDtfs, 89 SDslu, 1041 SDs, 0 SdLazy, 477 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 500 GetRequests, 328 SyntacticMatches, 45 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 463 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 636 ConstructedInterpolants, 0 QuantifiedInterpolants, 79740 SizeOfPredicates, 25 NumberOfNonLiveVariables, 417 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 283/444 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...