./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum40_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum40_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/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 3bc22eacddab290eba000ecad4885815ce9878ac ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 16:41:19,596 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:41:19,597 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:41:19,606 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:41:19,606 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:41:19,606 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:41:19,607 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:41:19,608 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:41:19,608 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:41:19,609 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:41:19,610 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:41:19,610 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:41:19,610 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:41:19,612 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:41:19,613 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:41:19,613 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:41:19,614 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:41:19,615 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:41:19,616 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:41:19,617 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:41:19,617 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:41:19,618 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:41:19,620 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:41:19,620 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:41:19,620 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:41:19,621 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:41:19,621 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:41:19,621 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:41:19,622 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:41:19,623 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:41:19,623 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:41:19,623 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:41:19,623 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:41:19,624 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:41:19,624 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:41:19,625 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:41:19,625 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 16:41:19,633 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:41:19,633 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:41:19,634 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 16:41:19,634 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 16:41:19,634 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 16:41:19,634 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 16:41:19,635 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 16:41:19,636 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:41:19,636 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 16:41:19,636 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:41:19,636 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 16:41:19,636 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:41:19,637 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 16:41:19,638 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:41:19,638 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 16:41:19,638 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 16:41:19,639 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 16:41:19,639 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 16:41:19,639 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 16:41:19,639 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 16:41:19,639 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_f354a901-aee7-43ec-91bb-27c9c475f072/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 -> 3bc22eacddab290eba000ecad4885815ce9878ac [2018-11-18 16:41:19,662 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:41:19,671 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:41:19,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:41:19,674 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:41:19,675 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:41:19,675 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum40_false-unreach-call.i [2018-11-18 16:41:19,719 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/data/8b3cff94c/83867aeba95445ee931913200062e7c9/FLAG2df4ff73d [2018-11-18 16:41:20,121 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:41:20,121 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/sv-benchmarks/c/reducercommutativity/rangesum40_false-unreach-call.i [2018-11-18 16:41:20,125 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/data/8b3cff94c/83867aeba95445ee931913200062e7c9/FLAG2df4ff73d [2018-11-18 16:41:20,133 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/data/8b3cff94c/83867aeba95445ee931913200062e7c9 [2018-11-18 16:41:20,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:41:20,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 16:41:20,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:41:20,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:41:20,139 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:41:20,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3030ea5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20, skipping insertion in model container [2018-11-18 16:41:20,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:41:20,162 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:41:20,275 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:41:20,280 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:41:20,296 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:41:20,305 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:41:20,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20 WrapperNode [2018-11-18 16:41:20,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:41:20,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 16:41:20,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 16:41:20,306 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 16:41:20,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 16:41:20,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:41:20,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:41:20,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:41:20,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... [2018-11-18 16:41:20,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:41:20,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:41:20,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:41:20,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:41:20,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 16:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 16:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 16:41:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:41:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 16:41:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2018-11-18 16:41:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 16:41:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2018-11-18 16:41:20,416 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2018-11-18 16:41:20,577 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:41:20,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:41:20 BoogieIcfgContainer [2018-11-18 16:41:20,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:41:20,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 16:41:20,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 16:41:20,580 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 16:41:20,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 04:41:20" (1/3) ... [2018-11-18 16:41:20,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e1ac8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:41:20, skipping insertion in model container [2018-11-18 16:41:20,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:41:20" (2/3) ... [2018-11-18 16:41:20,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e1ac8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 04:41:20, skipping insertion in model container [2018-11-18 16:41:20,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:41:20" (3/3) ... [2018-11-18 16:41:20,582 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum40_false-unreach-call.i [2018-11-18 16:41:20,589 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 16:41:20,594 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 16:41:20,607 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 16:41:20,628 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 16:41:20,628 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 16:41:20,628 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 16:41:20,629 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:41:20,629 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:41:20,629 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 16:41:20,629 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:41:20,629 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 16:41:20,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-11-18 16:41:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-18 16:41:20,643 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:20,643 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:20,645 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:20,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1049289672, now seen corresponding path program 1 times [2018-11-18 16:41:20,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:20,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:20,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:20,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:20,688 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:20,734 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2018-11-18 16:41:20,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:20,734 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:41:20,735 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-11-18 16:41:20,736 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [24], [26], [28], [31], [32], [39], [57], [61], [63], [64], [77], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:20,761 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:20,761 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:20,834 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:20,835 INFO L272 AbstractInterpreter]: Visited 9 different actions 9 times. Never merged. Never widened. Performed 56 root evaluator evaluations with a maximum evaluation depth of 3. Performed 56 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-11-18 16:41:20,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:20,844 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:20,888 INFO L227 lantSequenceWeakener]: Weakened 7 states. On average, predicates are now at 90.48% of their original sizes. [2018-11-18 16:41:20,888 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:20,906 INFO L415 sIntCurrentIteration]: We unified 36 AI predicates to 36 [2018-11-18 16:41:20,906 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:20,907 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:20,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 16:41:20,908 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:20,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 16:41:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 16:41:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 16:41:20,915 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2018-11-18 16:41:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:21,001 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2018-11-18 16:41:21,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 16:41:21,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2018-11-18 16:41:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:21,008 INFO L225 Difference]: With dead ends: 69 [2018-11-18 16:41:21,008 INFO L226 Difference]: Without dead ends: 35 [2018-11-18 16:41:21,010 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 16:41:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-18 16:41:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-11-18 16:41:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-18 16:41:21,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2018-11-18 16:41:21,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 37 [2018-11-18 16:41:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:21,040 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2018-11-18 16:41:21,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 16:41:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2018-11-18 16:41:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 16:41:21,041 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:21,041 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:21,041 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:21,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1338067039, now seen corresponding path program 1 times [2018-11-18 16:41:21,042 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:21,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,042 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:21,053 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:21,054 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:21,054 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:21,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,069 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:21,112 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 43 with the following transitions: [2018-11-18 16:41:21,113 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:21,114 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:21,114 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:21,125 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:21,125 INFO L272 AbstractInterpreter]: Visited 10 different actions 10 times. Never merged. Never widened. Performed 57 root evaluator evaluations with a maximum evaluation depth of 3. Performed 57 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Never found a fixpoint. Largest state had 23 variables. [2018-11-18 16:41:21,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,126 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:21,145 INFO L227 lantSequenceWeakener]: Weakened 8 states. On average, predicates are now at 88.89% of their original sizes. [2018-11-18 16:41:21,146 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:21,163 INFO L415 sIntCurrentIteration]: We unified 41 AI predicates to 41 [2018-11-18 16:41:21,163 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:21,164 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:21,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 16:41:21,164 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:21,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 16:41:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 16:41:21,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 16:41:21,166 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 5 states. [2018-11-18 16:41:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:21,292 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2018-11-18 16:41:21,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 16:41:21,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2018-11-18 16:41:21,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:21,293 INFO L225 Difference]: With dead ends: 62 [2018-11-18 16:41:21,293 INFO L226 Difference]: Without dead ends: 38 [2018-11-18 16:41:21,294 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-18 16:41:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-11-18 16:41:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-18 16:41:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2018-11-18 16:41:21,300 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 42 [2018-11-18 16:41:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:21,300 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2018-11-18 16:41:21,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 16:41:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2018-11-18 16:41:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-18 16:41:21,301 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:21,302 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:21,302 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:21,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1866850875, now seen corresponding path program 1 times [2018-11-18 16:41:21,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:21,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,303 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:21,315 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:21,315 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:21,315 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:21,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,328 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:21,354 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2018-11-18 16:41:21,354 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:21,356 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:21,356 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:21,388 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:21,389 INFO L272 AbstractInterpreter]: Visited 19 different actions 31 times. Merged at 3 different actions 9 times. Never widened. Performed 151 root evaluator evaluations with a maximum evaluation depth of 3. Performed 151 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 23 variables. [2018-11-18 16:41:21,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,390 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:21,413 INFO L227 lantSequenceWeakener]: Weakened 18 states. On average, predicates are now at 84.93% of their original sizes. [2018-11-18 16:41:21,414 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:21,454 INFO L415 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2018-11-18 16:41:21,454 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:21,455 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:21,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 16:41:21,455 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:21,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:41:21,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:41:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 16:41:21,456 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 7 states. [2018-11-18 16:41:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:21,719 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2018-11-18 16:41:21,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:41:21,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2018-11-18 16:41:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:21,720 INFO L225 Difference]: With dead ends: 61 [2018-11-18 16:41:21,720 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 16:41:21,721 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:41:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 16:41:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2018-11-18 16:41:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 16:41:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2018-11-18 16:41:21,726 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 45 [2018-11-18 16:41:21,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:21,726 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2018-11-18 16:41:21,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:41:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2018-11-18 16:41:21,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 16:41:21,727 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:21,728 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:21,728 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:21,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1254084674, now seen corresponding path program 1 times [2018-11-18 16:41:21,728 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:21,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:21,729 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:21,743 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:21,743 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:21,743 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:21,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:21,749 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:21,778 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-11-18 16:41:21,779 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:21,780 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:21,780 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:21,885 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:21,886 INFO L272 AbstractInterpreter]: Visited 23 different actions 45 times. Merged at 7 different actions 17 times. Never widened. Performed 182 root evaluator evaluations with a maximum evaluation depth of 10. Performed 182 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 3 fixpoints after 3 different actions. Largest state had 23 variables. [2018-11-18 16:41:21,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:21,888 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:21,969 INFO L227 lantSequenceWeakener]: Weakened 23 states. On average, predicates are now at 84.57% of their original sizes. [2018-11-18 16:41:21,969 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:21,996 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-11-18 16:41:21,996 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:21,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:21,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 16:41:21,997 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:21,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 16:41:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 16:41:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-18 16:41:21,998 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 7 states. [2018-11-18 16:41:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:22,232 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2018-11-18 16:41:22,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:41:22,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2018-11-18 16:41:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:22,234 INFO L225 Difference]: With dead ends: 70 [2018-11-18 16:41:22,234 INFO L226 Difference]: Without dead ends: 47 [2018-11-18 16:41:22,235 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-11-18 16:41:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-18 16:41:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-11-18 16:41:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 16:41:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2018-11-18 16:41:22,241 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 57 [2018-11-18 16:41:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:22,242 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2018-11-18 16:41:22,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 16:41:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2018-11-18 16:41:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-18 16:41:22,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:22,243 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:22,245 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:22,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1097185759, now seen corresponding path program 1 times [2018-11-18 16:41:22,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:22,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:22,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:22,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:22,246 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-11-18 16:41:22,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:22,304 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:41:22,305 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 58 with the following transitions: [2018-11-18 16:41:22,305 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:22,306 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:22,306 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:22,345 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:22,345 INFO L272 AbstractInterpreter]: Visited 31 different actions 72 times. Merged at 7 different actions 26 times. Never widened. Performed 257 root evaluator evaluations with a maximum evaluation depth of 3. Performed 257 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 4 fixpoints after 3 different actions. Largest state had 23 variables. [2018-11-18 16:41:22,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:22,348 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:22,381 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 83.29% of their original sizes. [2018-11-18 16:41:22,381 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:22,494 INFO L415 sIntCurrentIteration]: We unified 56 AI predicates to 56 [2018-11-18 16:41:22,494 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:22,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:41:22,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 14 [2018-11-18 16:41:22,495 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:22,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:41:22,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:41:22,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:22,496 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2018-11-18 16:41:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:22,962 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2018-11-18 16:41:22,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:41:22,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2018-11-18 16:41:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:22,963 INFO L225 Difference]: With dead ends: 85 [2018-11-18 16:41:22,963 INFO L226 Difference]: Without dead ends: 63 [2018-11-18 16:41:22,963 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2018-11-18 16:41:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-18 16:41:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2018-11-18 16:41:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-18 16:41:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2018-11-18 16:41:22,970 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 57 [2018-11-18 16:41:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:22,971 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2018-11-18 16:41:22,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:41:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2018-11-18 16:41:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-18 16:41:22,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:22,972 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:22,972 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:22,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:22,973 INFO L82 PathProgramCache]: Analyzing trace with hash -854883758, now seen corresponding path program 1 times [2018-11-18 16:41:22,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:22,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:22,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:22,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:22,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-11-18 16:41:23,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:23,019 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 16:41:23,020 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 61 with the following transitions: [2018-11-18 16:41:23,020 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [53], [55], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:23,021 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:23,021 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:23,084 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:23,084 INFO L272 AbstractInterpreter]: Visited 38 different actions 126 times. Merged at 13 different actions 57 times. Never widened. Performed 435 root evaluator evaluations with a maximum evaluation depth of 3. Performed 435 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 10 fixpoints after 7 different actions. Largest state had 25 variables. [2018-11-18 16:41:23,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:23,086 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:23,122 INFO L227 lantSequenceWeakener]: Weakened 57 states. On average, predicates are now at 81.14% of their original sizes. [2018-11-18 16:41:23,122 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:23,205 INFO L415 sIntCurrentIteration]: We unified 59 AI predicates to 59 [2018-11-18 16:41:23,205 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:23,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 16:41:23,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-11-18 16:41:23,206 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:23,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-18 16:41:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-18 16:41:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-18 16:41:23,207 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 14 states. [2018-11-18 16:41:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:23,676 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2018-11-18 16:41:23,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-18 16:41:23,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2018-11-18 16:41:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:23,677 INFO L225 Difference]: With dead ends: 75 [2018-11-18 16:41:23,677 INFO L226 Difference]: Without dead ends: 71 [2018-11-18 16:41:23,678 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-11-18 16:41:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-18 16:41:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2018-11-18 16:41:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-18 16:41:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2018-11-18 16:41:23,686 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 60 [2018-11-18 16:41:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:23,687 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2018-11-18 16:41:23,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-18 16:41:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2018-11-18 16:41:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-11-18 16:41:23,688 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:23,688 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:23,688 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:23,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1548690763, now seen corresponding path program 1 times [2018-11-18 16:41:23,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:23,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:23,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:23,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:23,690 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:23,696 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:23,696 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:23,696 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:23,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:23,708 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:23,748 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 62 with the following transitions: [2018-11-18 16:41:23,749 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:23,750 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:23,750 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:24,005 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 16:41:24,005 INFO L272 AbstractInterpreter]: Visited 33 different actions 163 times. Merged at 19 different actions 81 times. Never widened. Performed 693 root evaluator evaluations with a maximum evaluation depth of 10. Performed 693 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 18 fixpoints after 9 different actions. Largest state had 23 variables. [2018-11-18 16:41:24,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:24,012 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 16:41:24,047 INFO L227 lantSequenceWeakener]: Weakened 44 states. On average, predicates are now at 86.12% of their original sizes. [2018-11-18 16:41:24,048 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 16:41:24,091 INFO L415 sIntCurrentIteration]: We unified 60 AI predicates to 60 [2018-11-18 16:41:24,091 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 16:41:24,091 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:24,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-18 16:41:24,091 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:24,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 16:41:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 16:41:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:41:24,092 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 8 states. [2018-11-18 16:41:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:24,262 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2018-11-18 16:41:24,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 16:41:24,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2018-11-18 16:41:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:24,263 INFO L225 Difference]: With dead ends: 85 [2018-11-18 16:41:24,263 INFO L226 Difference]: Without dead ends: 61 [2018-11-18 16:41:24,264 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:41:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-18 16:41:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-18 16:41:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-18 16:41:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2018-11-18 16:41:24,271 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 61 [2018-11-18 16:41:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:24,271 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2018-11-18 16:41:24,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 16:41:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2018-11-18 16:41:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-18 16:41:24,273 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:24,273 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:24,273 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:24,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1372432828, now seen corresponding path program 1 times [2018-11-18 16:41:24,274 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:24,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:24,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:24,275 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:24,283 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:24,283 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:24,284 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:24,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:24,299 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:24,328 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-11-18 16:41:24,328 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [62], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:24,329 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:24,329 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:24,670 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 16:41:24,670 INFO L272 AbstractInterpreter]: Visited 41 different actions 244 times. Merged at 25 different actions 122 times. Never widened. Performed 1028 root evaluator evaluations with a maximum evaluation depth of 10. Performed 1028 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 26 fixpoints after 10 different actions. Largest state had 25 variables. [2018-11-18 16:41:24,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:24,684 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 16:41:24,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:24,684 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/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 [2018-11-18 16:41:24,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:24,692 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:41:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:24,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-18 16:41:24,771 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-11-18 16:41:24,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:24,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 16:41:24,840 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:24,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:41:24,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:41:24,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:24,843 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 6 states. [2018-11-18 16:41:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:24,860 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2018-11-18 16:41:24,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:41:24,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2018-11-18 16:41:24,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:24,861 INFO L225 Difference]: With dead ends: 114 [2018-11-18 16:41:24,861 INFO L226 Difference]: Without dead ends: 68 [2018-11-18 16:41:24,862 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-18 16:41:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-11-18 16:41:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-11-18 16:41:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2018-11-18 16:41:24,871 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 64 [2018-11-18 16:41:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:24,871 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2018-11-18 16:41:24,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:41:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2018-11-18 16:41:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-11-18 16:41:24,872 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:24,872 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:24,873 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:24,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:24,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1035999330, now seen corresponding path program 2 times [2018-11-18 16:41:24,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:24,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:24,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:24,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:24,874 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:24,885 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:24,886 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:24,886 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:24,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:24,903 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:24,944 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:24,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:24,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:24,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/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 [2018-11-18 16:41:24,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:41:24,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:41:24,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 16:41:24,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:24,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-18 16:41:25,003 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-18 16:41:25,069 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 16:41:25,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2018-11-18 16:41:25,069 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 16:41:25,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 16:41:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 16:41:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:25,070 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 4 states. [2018-11-18 16:41:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:25,099 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2018-11-18 16:41:25,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 16:41:25,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2018-11-18 16:41:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:25,101 INFO L225 Difference]: With dead ends: 114 [2018-11-18 16:41:25,101 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 16:41:25,102 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 16:41:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2018-11-18 16:41:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-18 16:41:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2018-11-18 16:41:25,113 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 73 [2018-11-18 16:41:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:25,113 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2018-11-18 16:41:25,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 16:41:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2018-11-18 16:41:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-18 16:41:25,114 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:25,114 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:25,114 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:25,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:25,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1140034890, now seen corresponding path program 1 times [2018-11-18 16:41:25,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:25,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:25,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,116 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:25,126 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:25,126 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:25,126 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:25,139 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:25,179 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 82 with the following transitions: [2018-11-18 16:41:25,179 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [7], [9], [11], [15], [18], [20], [22], [26], [28], [31], [32], [39], [43], [46], [48], [51], [53], [55], [61], [63], [64], [68], [71], [73], [75], [79], [80], [81], [82], [84], [85], [86], [87], [88], [89], [90], [91] [2018-11-18 16:41:25,180 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 16:41:25,181 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 16:41:25,370 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 16:41:25,371 INFO L272 AbstractInterpreter]: Visited 40 different actions 155 times. Merged at 14 different actions 69 times. Never widened. Performed 582 root evaluator evaluations with a maximum evaluation depth of 10. Performed 582 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 17 fixpoints after 7 different actions. Largest state had 25 variables. [2018-11-18 16:41:25,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:25,384 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 16:41:25,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:25,384 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/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 [2018-11-18 16:41:25,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:25,396 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:41:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:25,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-18 16:41:25,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-11-18 16:41:25,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:25,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 16:41:25,514 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:25,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:41:25,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:41:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:25,515 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 12 states. [2018-11-18 16:41:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:25,540 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2018-11-18 16:41:25,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:41:25,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2018-11-18 16:41:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:25,541 INFO L225 Difference]: With dead ends: 128 [2018-11-18 16:41:25,541 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 16:41:25,542 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 16:41:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-18 16:41:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-18 16:41:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2018-11-18 16:41:25,551 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 81 [2018-11-18 16:41:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:25,551 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2018-11-18 16:41:25,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:41:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2018-11-18 16:41:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-18 16:41:25,552 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:25,552 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 6, 6, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:25,552 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:25,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:25,553 INFO L82 PathProgramCache]: Analyzing trace with hash 424816630, now seen corresponding path program 2 times [2018-11-18 16:41:25,553 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:25,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:25,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,553 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:25,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:25,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:25,565 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:25,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:25,589 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:25,616 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:25,616 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:25,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:25,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:25,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:41:25,625 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:41:25,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 16:41:25,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:25,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2018-11-18 16:41:25,689 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2018-11-18 16:41:25,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:25,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 16:41:25,741 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:25,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:41:25,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:41:25,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:25,741 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand 6 states. [2018-11-18 16:41:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:25,755 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2018-11-18 16:41:25,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:41:25,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2018-11-18 16:41:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:25,757 INFO L225 Difference]: With dead ends: 126 [2018-11-18 16:41:25,757 INFO L226 Difference]: Without dead ends: 102 [2018-11-18 16:41:25,757 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-18 16:41:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-18 16:41:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-18 16:41:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2018-11-18 16:41:25,766 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 99 [2018-11-18 16:41:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:25,767 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2018-11-18 16:41:25,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:41:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2018-11-18 16:41:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-18 16:41:25,768 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:25,769 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:25,769 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:25,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash 94552847, now seen corresponding path program 3 times [2018-11-18 16:41:25,770 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:25,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:25,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:25,771 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:25,780 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:25,780 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:25,780 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:25,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:25,795 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:25,836 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:25,836 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:25,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:25,836 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:25,847 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:41:25,847 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:41:25,878 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:41:25,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:25,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-11-18 16:41:25,947 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-11-18 16:41:26,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:26,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2018-11-18 16:41:26,098 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:26,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-18 16:41:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-18 16:41:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 16:41:26,099 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 24 states. [2018-11-18 16:41:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:26,159 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2018-11-18 16:41:26,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-18 16:41:26,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-11-18 16:41:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:26,160 INFO L225 Difference]: With dead ends: 200 [2018-11-18 16:41:26,160 INFO L226 Difference]: Without dead ends: 138 [2018-11-18 16:41:26,161 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-18 16:41:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-18 16:41:26,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-11-18 16:41:26,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-18 16:41:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2018-11-18 16:41:26,170 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 108 [2018-11-18 16:41:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:26,170 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2018-11-18 16:41:26,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-18 16:41:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2018-11-18 16:41:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-18 16:41:26,171 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:26,171 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:26,171 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:26,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:26,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1673688945, now seen corresponding path program 4 times [2018-11-18 16:41:26,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:26,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:26,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:26,175 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:26,188 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:26,188 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:26,188 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:26,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:26,201 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:26,243 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:26,243 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:26,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:26,243 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:26,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:26,250 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:41:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:26,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-11-18 16:41:26,498 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-11-18 16:41:26,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:26,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2018-11-18 16:41:26,865 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:26,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-18 16:41:26,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-18 16:41:26,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 16:41:26,867 INFO L87 Difference]: Start difference. First operand 138 states and 150 transitions. Second operand 42 states. [2018-11-18 16:41:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:26,958 INFO L93 Difference]: Finished difference Result 254 states and 295 transitions. [2018-11-18 16:41:26,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-18 16:41:26,959 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 144 [2018-11-18 16:41:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:26,960 INFO L225 Difference]: With dead ends: 254 [2018-11-18 16:41:26,960 INFO L226 Difference]: Without dead ends: 192 [2018-11-18 16:41:26,961 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 16:41:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-18 16:41:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-11-18 16:41:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-18 16:41:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 204 transitions. [2018-11-18 16:41:26,970 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 204 transitions. Word has length 144 [2018-11-18 16:41:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:26,970 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 204 transitions. [2018-11-18 16:41:26,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-18 16:41:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 204 transitions. [2018-11-18 16:41:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-11-18 16:41:26,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:26,973 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 9, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:26,973 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:26,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -782972721, now seen corresponding path program 5 times [2018-11-18 16:41:26,973 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:26,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:26,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:26,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:26,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:26,997 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:26,997 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:26,997 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:27,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:27,009 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:27,057 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:27,057 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:27,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:27,057 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:27,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:41:27,063 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:41:27,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-18 16:41:27,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:27,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 2510 trivial. 0 not checked. [2018-11-18 16:41:27,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2560 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 2510 trivial. 0 not checked. [2018-11-18 16:41:27,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:27,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-11-18 16:41:27,161 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:27,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 16:41:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 16:41:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:41:27,161 INFO L87 Difference]: Start difference. First operand 192 states and 204 transitions. Second operand 8 states. [2018-11-18 16:41:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:27,195 INFO L93 Difference]: Finished difference Result 266 states and 304 transitions. [2018-11-18 16:41:27,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 16:41:27,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 198 [2018-11-18 16:41:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:27,201 INFO L225 Difference]: With dead ends: 266 [2018-11-18 16:41:27,201 INFO L226 Difference]: Without dead ends: 208 [2018-11-18 16:41:27,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:41:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-11-18 16:41:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-11-18 16:41:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-18 16:41:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 224 transitions. [2018-11-18 16:41:27,211 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 224 transitions. Word has length 198 [2018-11-18 16:41:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:27,211 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 224 transitions. [2018-11-18 16:41:27,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 16:41:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 224 transitions. [2018-11-18 16:41:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-11-18 16:41:27,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:27,215 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 21, 18, 18, 15, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:27,215 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:27,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:27,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1113345195, now seen corresponding path program 6 times [2018-11-18 16:41:27,215 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:27,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:27,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,216 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:27,238 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:27,238 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:27,238 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:27,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:27,250 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:27,292 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:27,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:27,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:27,293 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:27,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:41:27,298 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:41:27,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:41:27,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:27,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3184 backedges. 127 proven. 3 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2018-11-18 16:41:27,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3184 backedges. 33 proven. 349 refuted. 0 times theorem prover too weak. 2802 trivial. 0 not checked. [2018-11-18 16:41:27,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:27,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-11-18 16:41:27,483 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:27,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 16:41:27,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 16:41:27,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:27,484 INFO L87 Difference]: Start difference. First operand 208 states and 224 transitions. Second operand 6 states. [2018-11-18 16:41:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:27,504 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2018-11-18 16:41:27,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 16:41:27,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 246 [2018-11-18 16:41:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:27,507 INFO L225 Difference]: With dead ends: 294 [2018-11-18 16:41:27,507 INFO L226 Difference]: Without dead ends: 220 [2018-11-18 16:41:27,507 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-18 16:41:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-11-18 16:41:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2018-11-18 16:41:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-18 16:41:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 236 transitions. [2018-11-18 16:41:27,518 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 236 transitions. Word has length 246 [2018-11-18 16:41:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:27,518 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 236 transitions. [2018-11-18 16:41:27,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 16:41:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 236 transitions. [2018-11-18 16:41:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-11-18 16:41:27,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:27,521 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 30, 27, 27, 15, 12, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:27,521 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:27,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1829432298, now seen corresponding path program 7 times [2018-11-18 16:41:27,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,522 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:27,546 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:27,546 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:27,546 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:27,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:27,563 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:27,613 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:27,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:27,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:27,613 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:27,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:27,622 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:41:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:27,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 454 proven. 36 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-11-18 16:41:27,717 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 90 proven. 766 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2018-11-18 16:41:27,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:27,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 16:41:27,790 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:27,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:41:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:41:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:27,791 INFO L87 Difference]: Start difference. First operand 220 states and 236 transitions. Second operand 12 states. [2018-11-18 16:41:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:27,819 INFO L93 Difference]: Finished difference Result 330 states and 374 transitions. [2018-11-18 16:41:27,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:41:27,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 282 [2018-11-18 16:41:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:27,822 INFO L225 Difference]: With dead ends: 330 [2018-11-18 16:41:27,822 INFO L226 Difference]: Without dead ends: 244 [2018-11-18 16:41:27,823 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:27,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-11-18 16:41:27,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2018-11-18 16:41:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-18 16:41:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 260 transitions. [2018-11-18 16:41:27,833 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 260 transitions. Word has length 282 [2018-11-18 16:41:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:27,834 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 260 transitions. [2018-11-18 16:41:27,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:41:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 260 transitions. [2018-11-18 16:41:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-18 16:41:27,836 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:27,836 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 41, 40, 40, 30, 15, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:27,836 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:27,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash 321310828, now seen corresponding path program 8 times [2018-11-18 16:41:27,836 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:27,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:27,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:27,837 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:27,854 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:27,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:27,854 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:27,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:27,877 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:27,930 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:27,930 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:27,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:27,930 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:27,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:41:27,949 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:41:29,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-18 16:41:29,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:29,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6694 backedges. 1932 proven. 26 refuted. 0 times theorem prover too weak. 4736 trivial. 0 not checked. [2018-11-18 16:41:29,561 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6694 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6668 trivial. 0 not checked. [2018-11-18 16:41:29,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:29,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-11-18 16:41:29,649 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:29,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 16:41:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 16:41:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:29,650 INFO L87 Difference]: Start difference. First operand 244 states and 260 transitions. Second operand 12 states. [2018-11-18 16:41:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:29,673 INFO L93 Difference]: Finished difference Result 356 states and 391 transitions. [2018-11-18 16:41:29,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:41:29,673 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 354 [2018-11-18 16:41:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:29,675 INFO L225 Difference]: With dead ends: 356 [2018-11-18 16:41:29,675 INFO L226 Difference]: Without dead ends: 280 [2018-11-18 16:41:29,675 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-18 16:41:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-11-18 16:41:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2018-11-18 16:41:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-11-18 16:41:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 296 transitions. [2018-11-18 16:41:29,684 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 296 transitions. Word has length 354 [2018-11-18 16:41:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:29,685 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 296 transitions. [2018-11-18 16:41:29,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 16:41:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 296 transitions. [2018-11-18 16:41:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-11-18 16:41:29,687 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:29,687 INFO L375 BasicCegarLoop]: trace histogram [48, 45, 45, 41, 40, 40, 30, 15, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:29,687 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:29,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:29,688 INFO L82 PathProgramCache]: Analyzing trace with hash -961004084, now seen corresponding path program 9 times [2018-11-18 16:41:29,688 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:29,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:29,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:29,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:29,689 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:29,706 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:29,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:29,706 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:29,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:29,719 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:29,799 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:29,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:29,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:29,799 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:29,808 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:41:29,808 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:41:29,897 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:41:29,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:29,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6823 backedges. 1540 proven. 210 refuted. 0 times theorem prover too weak. 5073 trivial. 0 not checked. [2018-11-18 16:41:29,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6823 backedges. 204 proven. 2140 refuted. 0 times theorem prover too weak. 4479 trivial. 0 not checked. [2018-11-18 16:41:30,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:30,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2018-11-18 16:41:30,195 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:30,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-18 16:41:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-18 16:41:30,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-18 16:41:30,195 INFO L87 Difference]: Start difference. First operand 280 states and 296 transitions. Second operand 23 states. [2018-11-18 16:41:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:30,252 INFO L93 Difference]: Finished difference Result 470 states and 519 transitions. [2018-11-18 16:41:30,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-18 16:41:30,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 372 [2018-11-18 16:41:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:30,253 INFO L225 Difference]: With dead ends: 470 [2018-11-18 16:41:30,254 INFO L226 Difference]: Without dead ends: 324 [2018-11-18 16:41:30,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 721 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-18 16:41:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-11-18 16:41:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2018-11-18 16:41:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2018-11-18 16:41:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 340 transitions. [2018-11-18 16:41:30,266 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 340 transitions. Word has length 372 [2018-11-18 16:41:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:30,267 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 340 transitions. [2018-11-18 16:41:30,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-18 16:41:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 340 transitions. [2018-11-18 16:41:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-11-18 16:41:30,270 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:30,270 INFO L375 BasicCegarLoop]: trace histogram [81, 78, 78, 63, 41, 40, 40, 15, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:30,270 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:30,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1052177151, now seen corresponding path program 10 times [2018-11-18 16:41:30,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:30,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:30,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:30,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:30,271 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:30,291 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:30,291 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:30,291 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:30,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:30,306 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:30,393 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:30,393 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:30,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:30,394 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:30,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:30,402 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 16:41:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:30,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15073 backedges. 5622 proven. 1352 refuted. 0 times theorem prover too weak. 8099 trivial. 0 not checked. [2018-11-18 16:41:30,815 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15073 backedges. 0 proven. 6978 refuted. 0 times theorem prover too weak. 8095 trivial. 0 not checked. [2018-11-18 16:41:31,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:31,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-11-18 16:41:31,361 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:31,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-18 16:41:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-18 16:41:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 16:41:31,362 INFO L87 Difference]: Start difference. First operand 324 states and 340 transitions. Second operand 42 states. [2018-11-18 16:41:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:31,489 INFO L93 Difference]: Finished difference Result 570 states and 636 transitions. [2018-11-18 16:41:31,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-18 16:41:31,491 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 504 [2018-11-18 16:41:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:31,492 INFO L225 Difference]: With dead ends: 570 [2018-11-18 16:41:31,492 INFO L226 Difference]: Without dead ends: 380 [2018-11-18 16:41:31,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 953 SyntacticMatches, 14 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-18 16:41:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2018-11-18 16:41:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2018-11-18 16:41:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-18 16:41:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 410 transitions. [2018-11-18 16:41:31,504 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 410 transitions. Word has length 504 [2018-11-18 16:41:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:31,505 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 410 transitions. [2018-11-18 16:41:31,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-18 16:41:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 410 transitions. [2018-11-18 16:41:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 673 [2018-11-18 16:41:31,508 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:31,508 INFO L375 BasicCegarLoop]: trace histogram [123, 120, 120, 63, 57, 41, 40, 40, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:31,508 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:31,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 464301185, now seen corresponding path program 11 times [2018-11-18 16:41:31,509 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:31,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:31,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:31,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:31,510 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:31,526 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:31,526 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:31,526 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:31,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:31,540 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:31,620 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:31,620 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:31,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:31,620 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:31,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:41:31,626 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 16:41:32,389 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-18 16:41:32,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:32,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31873 backedges. 13251 proven. 155 refuted. 0 times theorem prover too weak. 18467 trivial. 0 not checked. [2018-11-18 16:41:32,590 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31873 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 31718 trivial. 0 not checked. [2018-11-18 16:41:32,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:32,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2018-11-18 16:41:32,915 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:32,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-18 16:41:32,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-18 16:41:32,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-11-18 16:41:32,916 INFO L87 Difference]: Start difference. First operand 380 states and 410 transitions. Second operand 26 states. [2018-11-18 16:41:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:33,000 INFO L93 Difference]: Finished difference Result 628 states and 703 transitions. [2018-11-18 16:41:33,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-18 16:41:33,001 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 672 [2018-11-18 16:41:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:33,003 INFO L225 Difference]: With dead ends: 628 [2018-11-18 16:41:33,003 INFO L226 Difference]: Without dead ends: 452 [2018-11-18 16:41:33,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1343 GetRequests, 1319 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-11-18 16:41:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2018-11-18 16:41:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2018-11-18 16:41:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2018-11-18 16:41:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 482 transitions. [2018-11-18 16:41:33,023 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 482 transitions. Word has length 672 [2018-11-18 16:41:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:33,024 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 482 transitions. [2018-11-18 16:41:33,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-18 16:41:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 482 transitions. [2018-11-18 16:41:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2018-11-18 16:41:33,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:33,029 INFO L375 BasicCegarLoop]: trace histogram [123, 120, 120, 63, 57, 41, 40, 40, 23, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:33,029 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:33,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1887179329, now seen corresponding path program 12 times [2018-11-18 16:41:33,029 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:33,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:33,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:33,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:33,030 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:33,053 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:33,053 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:33,053 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:33,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:33,067 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:41:33,154 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 16:41:33,154 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 16:41:33,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:41:33,154 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 16:41:33,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 16:41:33,159 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 16:41:33,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 16:41:33,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:41:33,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:41:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32455 backedges. 13132 proven. 737 refuted. 0 times theorem prover too weak. 18586 trivial. 0 not checked. [2018-11-18 16:41:33,582 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 16:41:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32455 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 31718 trivial. 0 not checked. [2018-11-18 16:41:34,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:41:34,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2018-11-18 16:41:34,160 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 16:41:34,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-18 16:41:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-18 16:41:34,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 16:41:34,162 INFO L87 Difference]: Start difference. First operand 452 states and 482 transitions. Second operand 41 states. [2018-11-18 16:41:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:41:34,265 INFO L93 Difference]: Finished difference Result 730 states and 815 transitions. [2018-11-18 16:41:34,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-18 16:41:34,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 708 [2018-11-18 16:41:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 16:41:34,268 INFO L225 Difference]: With dead ends: 730 [2018-11-18 16:41:34,268 INFO L226 Difference]: Without dead ends: 554 [2018-11-18 16:41:34,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1415 GetRequests, 1369 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-18 16:41:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2018-11-18 16:41:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2018-11-18 16:41:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2018-11-18 16:41:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 584 transitions. [2018-11-18 16:41:34,286 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 584 transitions. Word has length 708 [2018-11-18 16:41:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 16:41:34,287 INFO L480 AbstractCegarLoop]: Abstraction has 554 states and 584 transitions. [2018-11-18 16:41:34,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-18 16:41:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 584 transitions. [2018-11-18 16:41:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-11-18 16:41:34,291 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 16:41:34,292 INFO L375 BasicCegarLoop]: trace histogram [123, 120, 120, 63, 57, 41, 40, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:41:34,292 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 16:41:34,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:41:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1676592736, now seen corresponding path program 13 times [2018-11-18 16:41:34,292 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 16:41:34,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:34,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:41:34,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:41:34,293 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 16:41:34,308 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 16:41:34,309 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 16:41:34,309 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f354a901-aee7-43ec-91bb-27c9c475f072/bin-2019/utaipan/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 16:41:34,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:41:34,325 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 16:41:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-18 16:41:36,424 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-11-18 16:41:36,424 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 16:41:36,466 WARN L208 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-11-18 16:41:36,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 04:41:36 BoogieIcfgContainer [2018-11-18 16:41:36,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 16:41:36,466 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:41:36,466 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:41:36,467 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:41:36,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:41:20" (3/4) ... [2018-11-18 16:41:36,470 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 16:41:36,470 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:41:36,471 INFO L168 Benchmark]: Toolchain (without parser) took 16335.83 ms. Allocated memory was 1.0 GB in the beginning and 1.7 GB in the end (delta: 689.4 MB). Free memory was 959.7 MB in the beginning and 1.2 GB in the end (delta: -194.1 MB). Peak memory consumption was 495.3 MB. Max. memory is 11.5 GB. [2018-11-18 16:41:36,472 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:41:36,472 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.25 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-18 16:41:36,472 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.15 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:41:36,473 INFO L168 Benchmark]: Boogie Preprocessor took 21.55 ms. Allocated memory is still 1.0 GB. Free memory is still 946.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:41:36,473 INFO L168 Benchmark]: RCFGBuilder took 233.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:41:36,473 INFO L168 Benchmark]: TraceAbstraction took 15888.39 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 547.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -37.0 MB). Peak memory consumption was 510.9 MB. Max. memory is 11.5 GB. [2018-11-18 16:41:36,474 INFO L168 Benchmark]: Witness Printer took 4.18 ms. Allocated memory is still 1.7 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:41:36,475 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.25 ms. Allocated memory is still 1.0 GB. Free memory was 959.7 MB in the beginning and 948.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 16.15 ms. Allocated memory is still 1.0 GB. Free memory was 948.7 MB in the beginning and 946.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.55 ms. Allocated memory is still 1.0 GB. Free memory is still 946.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 233.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -170.7 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15888.39 ms. Allocated memory was 1.2 GB in the beginning and 1.7 GB in the end (delta: 547.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -37.0 MB). Peak memory consumption was 510.9 MB. Max. memory is 11.5 GB. * Witness Printer took 4.18 ms. Allocated memory is still 1.7 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L31] FCALL int x[40]; [L32] CALL init_nondet(x) [L5] int i; [L6] i = 0 [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 40 [L7] FCALL x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE, RET !(i < 40) [L32] init_nondet(x) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L38] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 40) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L38] EXPR rangesum(x) [L38] ret = rangesum(x) [L40] EXPR, FCALL x[0] [L40] temp=x[0] [L40] EXPR, FCALL x[1] [L40] FCALL x[0] = x[1] [L40] FCALL x[1] = temp [L41] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 40) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L41] EXPR rangesum(x) [L41] ret2 = rangesum(x) [L42] EXPR, FCALL x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<40 -1 [L44] EXPR, FCALL x[i+1] [L44] FCALL x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<40 -1) [L46] FCALL x[40 -1] = temp [L47] CALL, EXPR rangesum(x) [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND FALSE !(i > 40/2) [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 40 [L18] COND TRUE i > 40/2 [L19] EXPR, FCALL x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 40) [L23] COND TRUE cnt !=0 [L24] RET return ret / cnt; [L47] EXPR rangesum(x) [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. UNKNOWN Result, 15.8s OverallTime, 22 OverallIterations, 123 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 749 SDtfs, 651 SDslu, 2536 SDs, 0 SdLazy, 656 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 8168 GetRequests, 7844 SyntacticMatches, 28 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=554occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.2s AbstIntTime, 9 AbstIntIterations, 7 AbstIntStrong, 0.9151202569526435 AbsIntWeakeningRatio, 1.0340909090909092 AbsIntAvgWeakeningVarsNumRemoved, 3.303977272727273 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 37 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 8928 NumberOfCodeBlocks, 7961 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 7897 ConstructedInterpolants, 0 QuantifiedInterpolants, 4081663 SizeOfPredicates, 18 NumberOfNonLiveVariables, 6444 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 193432/208984 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...