./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0_true-unreach-call_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 16:33:28,612 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 16:33:28,613 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 16:33:28,621 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 16:33:28,621 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 16:33:28,622 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 16:33:28,622 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 16:33:28,623 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 16:33:28,624 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 16:33:28,625 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 16:33:28,626 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 16:33:28,626 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 16:33:28,626 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 16:33:28,627 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 16:33:28,628 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 16:33:28,628 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 16:33:28,629 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 16:33:28,630 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 16:33:28,631 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 16:33:28,632 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 16:33:28,633 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 16:33:28,634 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 16:33:28,636 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 16:33:28,636 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 16:33:28,636 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 16:33:28,637 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 16:33:28,637 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 16:33:28,638 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 16:33:28,638 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 16:33:28,639 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 16:33:28,639 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 16:33:28,640 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 16:33:28,640 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 16:33:28,640 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 16:33:28,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 16:33:28,641 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 16:33:28,641 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 16:33:28,651 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 16:33:28,651 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 16:33:28,652 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 16:33:28,652 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 16:33:28,652 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 16:33:28,652 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 16:33:28,652 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 16:33:28,652 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 16:33:28,653 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 16:33:28,653 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 16:33:28,654 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 16:33:28,655 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 16:33:28,655 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 16:33:28,655 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 16:33:28,656 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 16:33:28,656 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 16:33:28,656 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_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 -> b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc [2018-12-08 16:33:28,678 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 16:33:28,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 16:33:28,689 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 16:33:28,690 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 16:33:28,690 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 16:33:28,691 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/sum_10x0_true-unreach-call_true-termination.c [2018-12-08 16:33:28,731 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/data/6114be04e/2c58e1329d2c4f4c9cc020baeaf8fed4/FLAG71940fd10 [2018-12-08 16:33:29,065 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 16:33:29,066 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/sv-benchmarks/c/recursive-simple/sum_10x0_true-unreach-call_true-termination.c [2018-12-08 16:33:29,070 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/data/6114be04e/2c58e1329d2c4f4c9cc020baeaf8fed4/FLAG71940fd10 [2018-12-08 16:33:29,460 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/data/6114be04e/2c58e1329d2c4f4c9cc020baeaf8fed4 [2018-12-08 16:33:29,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 16:33:29,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 16:33:29,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 16:33:29,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 16:33:29,465 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 16:33:29,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e1e261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29, skipping insertion in model container [2018-12-08 16:33:29,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 16:33:29,482 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 16:33:29,569 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:33:29,571 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 16:33:29,579 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 16:33:29,587 INFO L195 MainTranslator]: Completed translation [2018-12-08 16:33:29,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29 WrapperNode [2018-12-08 16:33:29,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 16:33:29,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 16:33:29,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 16:33:29,587 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 16:33:29,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 16:33:29,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 16:33:29,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 16:33:29,602 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 16:33:29,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... [2018-12-08 16:33:29,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 16:33:29,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 16:33:29,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 16:33:29,617 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 16:33:29,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 16:33:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 16:33:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 16:33:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 16:33:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-12-08 16:33:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-12-08 16:33:29,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 16:33:29,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 16:33:29,762 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 16:33:29,762 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-12-08 16:33:29,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:33:29 BoogieIcfgContainer [2018-12-08 16:33:29,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 16:33:29,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 16:33:29,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 16:33:29,765 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 16:33:29,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 04:33:29" (1/3) ... [2018-12-08 16:33:29,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a19c2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:33:29, skipping insertion in model container [2018-12-08 16:33:29,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 04:33:29" (2/3) ... [2018-12-08 16:33:29,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a19c2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 04:33:29, skipping insertion in model container [2018-12-08 16:33:29,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:33:29" (3/3) ... [2018-12-08 16:33:29,766 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_10x0_true-unreach-call_true-termination.c [2018-12-08 16:33:29,772 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 16:33:29,776 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 16:33:29,786 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 16:33:29,804 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 16:33:29,804 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 16:33:29,804 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 16:33:29,804 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 16:33:29,804 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 16:33:29,804 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 16:33:29,804 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 16:33:29,804 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 16:33:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-12-08 16:33:29,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 16:33:29,818 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:29,818 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:29,820 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:29,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2018-12-08 16:33:29,824 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:29,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:29,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:29,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:29,853 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 16:33:29,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 16:33:29,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-08 16:33:29,924 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 16:33:29,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-08 16:33:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-08 16:33:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-08 16:33:29,935 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2018-12-08 16:33:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:29,987 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-12-08 16:33:29,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-08 16:33:29,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-08 16:33:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:29,994 INFO L225 Difference]: With dead ends: 30 [2018-12-08 16:33:29,994 INFO L226 Difference]: Without dead ends: 18 [2018-12-08 16:33:29,995 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 [2018-12-08 16:33:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-12-08 16:33:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-12-08 16:33:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-08 16:33:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-12-08 16:33:30,018 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-12-08 16:33:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:30,019 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-12-08 16:33:30,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-08 16:33:30,019 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-12-08 16:33:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 16:33:30,020 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:30,020 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:30,020 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:30,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:30,020 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2018-12-08 16:33:30,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:30,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:30,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,021 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 16:33:30,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:30,059 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-12-08 16:33:30,060 INFO L205 CegarAbsIntRunner]: [0], [4], [7], [8], [10], [11], [12], [14], [17], [19], [25], [26], [27], [29], [30], [31], [32] [2018-12-08 16:33:30,081 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 16:33:30,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 16:33:30,176 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 16:33:30,177 INFO L272 AbstractInterpreter]: Visited 17 different actions 50 times. Never merged. Widened at 1 different actions 2 times. Performed 130 root evaluator evaluations with a maximum evaluation depth of 4. Performed 130 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 2 fixpoints after 2 different actions. Largest state had 6 variables. [2018-12-08 16:33:30,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:30,183 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 16:33:30,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,183 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:30,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:30,195 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:33:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:30,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 16:33:30,229 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-08 16:33:30,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:30,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2018-12-08 16:33:30,369 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:30,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-08 16:33:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-08 16:33:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-12-08 16:33:30,370 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2018-12-08 16:33:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:30,402 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-12-08 16:33:30,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-08 16:33:30,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-12-08 16:33:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:30,403 INFO L225 Difference]: With dead ends: 25 [2018-12-08 16:33:30,403 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 16:33:30,404 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-12-08 16:33:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 16:33:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-08 16:33:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-08 16:33:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-08 16:33:30,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2018-12-08 16:33:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:30,407 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-08 16:33:30,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-08 16:33:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-08 16:33:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 16:33:30,408 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:30,408 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:30,408 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:30,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2018-12-08 16:33:30,408 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:30,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:30,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,409 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 16:33:30,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,444 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:30,444 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:30,444 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:30,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,444 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:30,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:33:30,450 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:33:30,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-08 16:33:30,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:30,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-08 16:33:30,467 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-08 16:33:30,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:30,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2018-12-08 16:33:30,632 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:30,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 16:33:30,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 16:33:30,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-12-08 16:33:30,633 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2018-12-08 16:33:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:30,678 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-12-08 16:33:30,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 16:33:30,679 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-12-08 16:33:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:30,680 INFO L225 Difference]: With dead ends: 28 [2018-12-08 16:33:30,680 INFO L226 Difference]: Without dead ends: 24 [2018-12-08 16:33:30,681 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-08 16:33:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-12-08 16:33:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-12-08 16:33:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-12-08 16:33:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-12-08 16:33:30,685 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2018-12-08 16:33:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:30,686 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-12-08 16:33:30,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 16:33:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-12-08 16:33:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-08 16:33:30,687 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:30,687 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:30,687 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:30,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2018-12-08 16:33:30,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:30,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:30,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:30,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 16:33:30,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:30,746 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:30,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:30,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:30,746 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:33:30,752 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:33:30,760 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:33:30,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:30,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 16:33:30,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-08 16:33:31,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:31,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2018-12-08 16:33:31,044 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:31,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-08 16:33:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-08 16:33:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-12-08 16:33:31,045 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2018-12-08 16:33:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:31,077 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-12-08 16:33:31,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-08 16:33:31,078 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-12-08 16:33:31,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:31,078 INFO L225 Difference]: With dead ends: 31 [2018-12-08 16:33:31,078 INFO L226 Difference]: Without dead ends: 27 [2018-12-08 16:33:31,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2018-12-08 16:33:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-08 16:33:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-08 16:33:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-08 16:33:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-08 16:33:31,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2018-12-08 16:33:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:31,082 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-08 16:33:31,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-08 16:33:31,082 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-08 16:33:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-08 16:33:31,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:31,082 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:31,083 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:31,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2018-12-08 16:33:31,083 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:31,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:31,084 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 16:33:31,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:31,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:31,137 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:31,137 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:31,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:31,138 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:31,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:31,144 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:33:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:31,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-08 16:33:31,162 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-12-08 16:33:31,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:31,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 15 [2018-12-08 16:33:31,566 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:31,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-08 16:33:31,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-08 16:33:31,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-12-08 16:33:31,567 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2018-12-08 16:33:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:31,610 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-12-08 16:33:31,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-08 16:33:31,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-12-08 16:33:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:31,611 INFO L225 Difference]: With dead ends: 34 [2018-12-08 16:33:31,612 INFO L226 Difference]: Without dead ends: 30 [2018-12-08 16:33:31,612 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2018-12-08 16:33:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-12-08 16:33:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-12-08 16:33:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-08 16:33:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-12-08 16:33:31,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2018-12-08 16:33:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:31,615 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-12-08 16:33:31,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-08 16:33:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-12-08 16:33:31,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-08 16:33:31,616 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:31,616 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:31,616 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:31,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2018-12-08 16:33:31,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:31,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:31,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:31,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:31,618 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 16:33:31,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:31,679 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:31,679 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:31,679 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:31,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:31,680 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/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 [2018-12-08 16:33:31,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:33:31,686 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:33:31,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-08 16:33:31,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:31,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-08 16:33:31,706 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-08 16:33:32,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:32,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2018-12-08 16:33:32,326 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:32,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 16:33:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 16:33:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2018-12-08 16:33:32,327 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-12-08 16:33:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:32,382 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-12-08 16:33:32,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 16:33:32,383 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-12-08 16:33:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:32,383 INFO L225 Difference]: With dead ends: 37 [2018-12-08 16:33:32,383 INFO L226 Difference]: Without dead ends: 33 [2018-12-08 16:33:32,384 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2018-12-08 16:33:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-08 16:33:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-08 16:33:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-08 16:33:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-08 16:33:32,387 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2018-12-08 16:33:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:32,387 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-08 16:33:32,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 16:33:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-08 16:33:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-08 16:33:32,388 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:32,388 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:32,388 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:32,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2018-12-08 16:33:32,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:32,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:32,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:32,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:32,389 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 16:33:32,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:32,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:32,455 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:32,455 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:32,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:32,455 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:33:32,463 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:33:32,463 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:33:32,474 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:33:32,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:32,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-08 16:33:32,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-12-08 16:33:33,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:33,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 19 [2018-12-08 16:33:33,289 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:33,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-08 16:33:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-08 16:33:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2018-12-08 16:33:33,290 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2018-12-08 16:33:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:33,354 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-12-08 16:33:33,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-08 16:33:33,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2018-12-08 16:33:33,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:33,355 INFO L225 Difference]: With dead ends: 40 [2018-12-08 16:33:33,355 INFO L226 Difference]: Without dead ends: 36 [2018-12-08 16:33:33,355 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2018-12-08 16:33:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-12-08 16:33:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-12-08 16:33:33,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-12-08 16:33:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-12-08 16:33:33,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2018-12-08 16:33:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:33,358 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-12-08 16:33:33,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-08 16:33:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-12-08 16:33:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-12-08 16:33:33,359 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:33,359 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:33,359 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:33,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:33,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2018-12-08 16:33:33,359 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:33,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:33,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:33,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:33,360 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 16:33:33,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:33,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:33,421 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:33,421 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:33,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:33,421 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:33:33,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:33,428 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:33:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:33,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-08 16:33:33,447 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-08 16:33:34,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:34,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2018-12-08 16:33:34,562 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:34,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-08 16:33:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-08 16:33:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2018-12-08 16:33:34,563 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2018-12-08 16:33:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:34,649 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-12-08 16:33:34,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-08 16:33:34,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2018-12-08 16:33:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:34,650 INFO L225 Difference]: With dead ends: 43 [2018-12-08 16:33:34,650 INFO L226 Difference]: Without dead ends: 39 [2018-12-08 16:33:34,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-12-08 16:33:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-08 16:33:34,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-08 16:33:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-08 16:33:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-08 16:33:34,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2018-12-08 16:33:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:34,655 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-08 16:33:34,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-08 16:33:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-08 16:33:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-08 16:33:34,656 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:34,656 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:34,656 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:34,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2018-12-08 16:33:34,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:34,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:34,657 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 16:33:34,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:34,726 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:34,726 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:34,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:34,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:34,726 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:33:34,732 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 16:33:34,732 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 16:33:34,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-12-08 16:33:34,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:34,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-08 16:33:34,761 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-12-08 16:33:36,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:36,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 23 [2018-12-08 16:33:36,209 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:36,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-08 16:33:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-08 16:33:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2018-12-08 16:33:36,210 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2018-12-08 16:33:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:36,286 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-12-08 16:33:36,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-08 16:33:36,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2018-12-08 16:33:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:36,286 INFO L225 Difference]: With dead ends: 46 [2018-12-08 16:33:36,287 INFO L226 Difference]: Without dead ends: 42 [2018-12-08 16:33:36,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2018-12-08 16:33:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-12-08 16:33:36,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-12-08 16:33:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-12-08 16:33:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-12-08 16:33:36,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2018-12-08 16:33:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:36,290 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-12-08 16:33:36,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-08 16:33:36,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-12-08 16:33:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-12-08 16:33:36,291 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:36,291 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:36,291 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:36,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:36,291 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2018-12-08 16:33:36,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:36,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:36,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:36,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:36,292 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 16:33:36,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:36,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:36,375 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:36,375 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:36,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:36,375 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:33:36,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 16:33:36,381 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 16:33:36,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 16:33:36,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 16:33:36,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-08 16:33:36,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-08 16:33:38,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:38,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 24 [2018-12-08 16:33:38,413 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:38,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-08 16:33:38,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-08 16:33:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-12-08 16:33:38,414 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2018-12-08 16:33:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:38,493 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-12-08 16:33:38,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-08 16:33:38,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2018-12-08 16:33:38,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:38,494 INFO L225 Difference]: With dead ends: 49 [2018-12-08 16:33:38,494 INFO L226 Difference]: Without dead ends: 45 [2018-12-08 16:33:38,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 21 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=385, Invalid=737, Unknown=0, NotChecked=0, Total=1122 [2018-12-08 16:33:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-08 16:33:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-08 16:33:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-08 16:33:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-08 16:33:38,497 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2018-12-08 16:33:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:38,498 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-08 16:33:38,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-08 16:33:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-08 16:33:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-12-08 16:33:38,498 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 16:33:38,498 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 16:33:38,498 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 16:33:38,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 16:33:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2018-12-08 16:33:38,499 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 16:33:38,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:38,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 16:33:38,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 16:33:38,499 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 16:33:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-08 16:33:38,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:38,890 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 16:33:38,890 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 16:33:38,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 16:33:38,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 16:33:38,891 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 16:33:38,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 16:33:38,899 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 16:33:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 16:33:38,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 16:33:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 154 proven. 20 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-12-08 16:33:39,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 16:33:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 135 proven. 120 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-12-08 16:33:44,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 16:33:44,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 38] total 88 [2018-12-08 16:33:44,307 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 16:33:44,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-08 16:33:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-08 16:33:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=6750, Unknown=0, NotChecked=0, Total=7656 [2018-12-08 16:33:44,309 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 56 states. [2018-12-08 16:33:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 16:33:45,312 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2018-12-08 16:33:45,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-12-08 16:33:45,313 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 73 [2018-12-08 16:33:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 16:33:45,314 INFO L225 Difference]: With dead ends: 48 [2018-12-08 16:33:45,314 INFO L226 Difference]: Without dead ends: 0 [2018-12-08 16:33:45,317 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1797, Invalid=10635, Unknown=0, NotChecked=0, Total=12432 [2018-12-08 16:33:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-08 16:33:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-08 16:33:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-08 16:33:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-08 16:33:45,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2018-12-08 16:33:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 16:33:45,319 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-08 16:33:45,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-08 16:33:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-08 16:33:45,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-08 16:33:45,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-08 16:33:45,352 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-08 16:33:45,353 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-12-08 16:33:45,353 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-08 16:33:45,353 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-12-08 16:33:45,354 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= 10 main_~a~0) (<= main_~a~0 10)) [2018-12-08 16:33:45,354 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-12-08 16:33:45,354 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2018-12-08 16:33:45,354 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-12-08 16:33:45,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 04:33:45 BoogieIcfgContainer [2018-12-08 16:33:45,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 16:33:45,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 16:33:45,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 16:33:45,356 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 16:33:45,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 04:33:29" (3/4) ... [2018-12-08 16:33:45,359 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-08 16:33:45,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-08 16:33:45,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-12-08 16:33:45,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-08 16:33:45,366 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-12-08 16:33:45,366 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-08 16:33:45,366 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-08 16:33:45,390 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6d70c2ac-fed4-4af7-91ca-8e9f668aa1e3/bin-2019/utaipan/witness.graphml [2018-12-08 16:33:45,390 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 16:33:45,390 INFO L168 Benchmark]: Toolchain (without parser) took 15928.56 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 489.2 MB). Free memory was 949.7 MB in the beginning and 1.4 GB in the end (delta: -401.8 MB). Peak memory consumption was 87.3 MB. Max. memory is 11.5 GB. [2018-12-08 16:33:45,391 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:33:45,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.56 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 16:33:45,391 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.77 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:33:45,391 INFO L168 Benchmark]: Boogie Preprocessor took 14.69 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 16:33:45,392 INFO L168 Benchmark]: RCFGBuilder took 145.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -155.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. [2018-12-08 16:33:45,392 INFO L168 Benchmark]: TraceAbstraction took 15593.10 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 372.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -271.0 MB). Peak memory consumption was 101.2 MB. Max. memory is 11.5 GB. [2018-12-08 16:33:45,392 INFO L168 Benchmark]: Witness Printer took 33.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. [2018-12-08 16:33:45,393 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 124.56 ms. Allocated memory is still 1.0 GB. Free memory was 949.7 MB in the beginning and 939.0 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 14.77 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.69 ms. Allocated memory is still 1.0 GB. Free memory is still 939.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 145.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 939.0 MB in the beginning and 1.1 GB in the end (delta: -155.2 MB). Peak memory consumption was 15.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15593.10 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 372.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -271.0 MB). Peak memory consumption was 101.2 MB. Max. memory is 11.5 GB. * Witness Printer took 33.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 4 procedures, 20 locations, 1 error locations. SAFE Result, 15.5s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 142 SDtfs, 226 SDslu, 1049 SDs, 0 SdLazy, 1276 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1167 GetRequests, 752 SyntacticMatches, 113 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3130 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 933 NumberOfCodeBlocks, 912 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1362 ConstructedInterpolants, 0 QuantifiedInterpolants, 314952 SizeOfPredicates, 89 NumberOfNonLiveVariables, 1266 ConjunctsInSsa, 243 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 1681/3630 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...