./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 a881e1073186594f4727f809fbe5d917ff145543 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 00:17:13,084 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 00:17:13,086 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 00:17:13,095 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 00:17:13,095 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 00:17:13,096 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 00:17:13,097 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 00:17:13,098 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 00:17:13,099 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 00:17:13,099 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 00:17:13,100 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 00:17:13,100 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 00:17:13,101 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 00:17:13,102 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 00:17:13,102 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 00:17:13,103 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 00:17:13,104 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 00:17:13,105 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 00:17:13,106 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 00:17:13,107 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 00:17:13,108 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 00:17:13,109 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 00:17:13,111 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 00:17:13,111 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 00:17:13,111 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 00:17:13,112 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 00:17:13,112 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 00:17:13,113 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 00:17:13,113 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 00:17:13,114 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 00:17:13,114 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 00:17:13,115 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 00:17:13,115 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 00:17:13,115 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 00:17:13,116 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 00:17:13,116 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 00:17:13,117 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 00:17:13,124 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 00:17:13,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 00:17:13,124 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 00:17:13,124 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 00:17:13,124 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 00:17:13,125 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 00:17:13,125 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 00:17:13,126 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 00:17:13,126 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 00:17:13,126 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 00:17:13,126 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 00:17:13,126 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 00:17:13,127 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 00:17:13,128 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 00:17:13,128 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 00:17:13,128 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 00:17:13,129 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 00:17:13,129 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 00:17:13,129 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 00:17:13,129 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 00:17:13,129 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_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 -> a881e1073186594f4727f809fbe5d917ff145543 [2018-11-23 00:17:13,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 00:17:13,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 00:17:13,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 00:17:13,158 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 00:17:13,158 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 00:17:13,159 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/../../sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i [2018-11-23 00:17:13,196 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/data/c5d1b56d1/ace4397d85d446489d10809f35f42ba2/FLAG00d5e2f0e [2018-11-23 00:17:13,600 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 00:17:13,600 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/sv-benchmarks/c/loop-new/nested_true-unreach-call_true-termination.i [2018-11-23 00:17:13,604 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/data/c5d1b56d1/ace4397d85d446489d10809f35f42ba2/FLAG00d5e2f0e [2018-11-23 00:17:13,612 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/data/c5d1b56d1/ace4397d85d446489d10809f35f42ba2 [2018-11-23 00:17:13,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 00:17:13,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 00:17:13,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 00:17:13,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 00:17:13,620 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 00:17:13,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457f80a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13, skipping insertion in model container [2018-11-23 00:17:13,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 00:17:13,641 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 00:17:13,745 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 00:17:13,747 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 00:17:13,757 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 00:17:13,768 INFO L195 MainTranslator]: Completed translation [2018-11-23 00:17:13,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13 WrapperNode [2018-11-23 00:17:13,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 00:17:13,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 00:17:13,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 00:17:13,769 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 00:17:13,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 00:17:13,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 00:17:13,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 00:17:13,783 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 00:17:13,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... [2018-11-23 00:17:13,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 00:17:13,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 00:17:13,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 00:17:13,798 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 00:17:13,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 00:17:13,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 00:17:13,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 00:17:13,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 00:17:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 00:17:13,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 00:17:13,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 00:17:13,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 00:17:14,000 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 00:17:14,000 INFO L280 CfgBuilder]: Removed 2 assue(true) statements. [2018-11-23 00:17:14,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:17:14 BoogieIcfgContainer [2018-11-23 00:17:14,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 00:17:14,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 00:17:14,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 00:17:14,003 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 00:17:14,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:17:13" (1/3) ... [2018-11-23 00:17:14,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646a7320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:17:14, skipping insertion in model container [2018-11-23 00:17:14,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:17:13" (2/3) ... [2018-11-23 00:17:14,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646a7320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:17:14, skipping insertion in model container [2018-11-23 00:17:14,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:17:14" (3/3) ... [2018-11-23 00:17:14,005 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-11-23 00:17:14,012 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 00:17:14,018 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 00:17:14,034 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 00:17:14,062 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 00:17:14,062 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 00:17:14,062 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 00:17:14,062 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 00:17:14,062 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 00:17:14,063 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 00:17:14,063 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 00:17:14,063 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 00:17:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-23 00:17:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-23 00:17:14,082 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:14,083 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:14,084 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:14,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1266359381, now seen corresponding path program 1 times [2018-11-23 00:17:14,090 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:14,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:14,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,130 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,209 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 00:17:14,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 00:17:14,210 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 00:17:14,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 00:17:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 00:17:14,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 00:17:14,226 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2018-11-23 00:17:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:14,279 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2018-11-23 00:17:14,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 00:17:14,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-11-23 00:17:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:14,288 INFO L225 Difference]: With dead ends: 45 [2018-11-23 00:17:14,288 INFO L226 Difference]: Without dead ends: 20 [2018-11-23 00:17:14,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-23 00:17:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-23 00:17:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-11-23 00:17:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-23 00:17:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-23 00:17:14,321 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2018-11-23 00:17:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:14,321 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-23 00:17:14,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 00:17:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-23 00:17:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-23 00:17:14,322 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:14,322 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:14,322 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:14,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1008321469, now seen corresponding path program 1 times [2018-11-23 00:17:14,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:14,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:14,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,324 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 00:17:14,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-23 00:17:14,360 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 00:17:14,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 00:17:14,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 00:17:14,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 00:17:14,361 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-11-23 00:17:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:14,404 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-11-23 00:17:14,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 00:17:14,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-23 00:17:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:14,406 INFO L225 Difference]: With dead ends: 28 [2018-11-23 00:17:14,406 INFO L226 Difference]: Without dead ends: 19 [2018-11-23 00:17:14,406 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-23 00:17:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-11-23 00:17:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-11-23 00:17:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 00:17:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-23 00:17:14,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-11-23 00:17:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:14,410 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-23 00:17:14,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 00:17:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-23 00:17:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 00:17:14,411 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:14,411 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:14,411 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:14,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1823795457, now seen corresponding path program 1 times [2018-11-23 00:17:14,412 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:14,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:14,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:14,458 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:14,459 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-23 00:17:14,460 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [18], [20], [26], [28], [30], [34], [41], [44], [46], [52], [53], [54], [56] [2018-11-23 00:17:14,482 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 00:17:14,483 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 00:17:14,628 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 00:17:14,628 INFO L272 AbstractInterpreter]: Visited 17 different actions 41 times. Merged at 6 different actions 13 times. Widened at 1 different actions 1 times. Performed 134 root evaluator evaluations with a maximum evaluation depth of 3. Performed 134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 5 fixpoints after 2 different actions. Largest state had 10 variables. [2018-11-23 00:17:14,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:14,638 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 00:17:14,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:14,639 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:14,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:14,650 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:14,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:14,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-11-23 00:17:14,780 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:14,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 00:17:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 00:17:14,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-11-23 00:17:14,781 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-11-23 00:17:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:14,800 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-11-23 00:17:14,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 00:17:14,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-11-23 00:17:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:14,801 INFO L225 Difference]: With dead ends: 31 [2018-11-23 00:17:14,801 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 00:17:14,802 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-11-23 00:17:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 00:17:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-11-23 00:17:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-23 00:17:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-11-23 00:17:14,805 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2018-11-23 00:17:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:14,805 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-11-23 00:17:14,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 00:17:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-11-23 00:17:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 00:17:14,806 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:14,806 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:14,806 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:14,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash 478895679, now seen corresponding path program 2 times [2018-11-23 00:17:14,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:14,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:14,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:14,808 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:17:14,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:14,884 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:14,884 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:14,884 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:14,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:14,885 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:14,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:14,894 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:14,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-23 00:17:14,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:14,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 00:17:14,935 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 00:17:15,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:15,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-11-23 00:17:15,004 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:15,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 00:17:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 00:17:15,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-23 00:17:15,005 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2018-11-23 00:17:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:15,184 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2018-11-23 00:17:15,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 00:17:15,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-11-23 00:17:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:15,185 INFO L225 Difference]: With dead ends: 54 [2018-11-23 00:17:15,185 INFO L226 Difference]: Without dead ends: 42 [2018-11-23 00:17:15,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-11-23 00:17:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-23 00:17:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2018-11-23 00:17:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-23 00:17:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-11-23 00:17:15,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 19 [2018-11-23 00:17:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:15,193 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-11-23 00:17:15,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 00:17:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-11-23 00:17:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-23 00:17:15,193 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:15,194 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:15,194 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:15,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash -441049109, now seen corresponding path program 3 times [2018-11-23 00:17:15,194 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:15,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:15,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,196 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 00:17:15,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,241 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:15,241 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:15,242 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:15,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,242 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:15,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 00:17:15,251 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 00:17:15,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 00:17:15,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:15,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 00:17:15,321 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-23 00:17:15,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:15,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-11-23 00:17:15,383 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:15,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 00:17:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 00:17:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-11-23 00:17:15,384 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 11 states. [2018-11-23 00:17:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:15,418 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2018-11-23 00:17:15,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 00:17:15,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-11-23 00:17:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:15,419 INFO L225 Difference]: With dead ends: 53 [2018-11-23 00:17:15,419 INFO L226 Difference]: Without dead ends: 37 [2018-11-23 00:17:15,419 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-11-23 00:17:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-23 00:17:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-23 00:17:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-23 00:17:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-11-23 00:17:15,425 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-11-23 00:17:15,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:15,425 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-11-23 00:17:15,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 00:17:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-11-23 00:17:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-23 00:17:15,426 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:15,426 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:15,426 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:15,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1891685973, now seen corresponding path program 4 times [2018-11-23 00:17:15,427 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:15,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:15,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,428 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 00:17:15,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:15,491 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:15,491 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:15,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,491 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:15,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:15,506 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:15,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 00:17:15,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 00:17:15,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:15,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-11-23 00:17:15,634 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:15,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 00:17:15,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 00:17:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-11-23 00:17:15,635 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 13 states. [2018-11-23 00:17:15,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:15,670 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-11-23 00:17:15,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 00:17:15,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-11-23 00:17:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:15,673 INFO L225 Difference]: With dead ends: 59 [2018-11-23 00:17:15,673 INFO L226 Difference]: Without dead ends: 41 [2018-11-23 00:17:15,674 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-11-23 00:17:15,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-23 00:17:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-23 00:17:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 00:17:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-11-23 00:17:15,679 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-11-23 00:17:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:15,679 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-11-23 00:17:15,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 00:17:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-11-23 00:17:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-23 00:17:15,680 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:15,680 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:15,680 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:15,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash -98733461, now seen corresponding path program 5 times [2018-11-23 00:17:15,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:15,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:15,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,682 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-11-23 00:17:15,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,739 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:15,739 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:15,739 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:15,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:15,739 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:15,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:15,745 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:15,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-23 00:17:15,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:15,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 64 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 00:17:15,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 3 proven. 86 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-23 00:17:15,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:15,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-11-23 00:17:15,899 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:15,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 00:17:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 00:17:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-11-23 00:17:15,900 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 15 states. [2018-11-23 00:17:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:15,929 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-11-23 00:17:15,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 00:17:15,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2018-11-23 00:17:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:15,931 INFO L225 Difference]: With dead ends: 65 [2018-11-23 00:17:15,931 INFO L226 Difference]: Without dead ends: 45 [2018-11-23 00:17:15,931 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-11-23 00:17:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-23 00:17:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-23 00:17:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-23 00:17:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-23 00:17:15,937 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2018-11-23 00:17:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:15,937 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-23 00:17:15,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 00:17:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-23 00:17:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-23 00:17:15,938 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:15,938 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:15,938 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:15,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:15,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1878148565, now seen corresponding path program 6 times [2018-11-23 00:17:15,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:15,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:15,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:15,939 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-23 00:17:16,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,016 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:16,016 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:16,016 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:16,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,017 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:16,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 00:17:16,026 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 00:17:16,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 00:17:16,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:16,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-23 00:17:16,113 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-11-23 00:17:16,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:16,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-11-23 00:17:16,194 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:16,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 00:17:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 00:17:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-11-23 00:17:16,195 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 17 states. [2018-11-23 00:17:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:16,225 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-11-23 00:17:16,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 00:17:16,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2018-11-23 00:17:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:16,230 INFO L225 Difference]: With dead ends: 71 [2018-11-23 00:17:16,230 INFO L226 Difference]: Without dead ends: 49 [2018-11-23 00:17:16,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-11-23 00:17:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-23 00:17:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-11-23 00:17:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-23 00:17:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-11-23 00:17:16,235 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2018-11-23 00:17:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:16,235 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-11-23 00:17:16,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 00:17:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-11-23 00:17:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-23 00:17:16,236 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:16,236 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:16,236 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:16,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1034108693, now seen corresponding path program 7 times [2018-11-23 00:17:16,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:16,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:16,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,237 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-23 00:17:16,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:16,305 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:16,305 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:16,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,305 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:16,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:16,312 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:16,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-23 00:17:16,385 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 115 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2018-11-23 00:17:16,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:16,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-11-23 00:17:16,448 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:16,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 00:17:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 00:17:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-11-23 00:17:16,449 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 19 states. [2018-11-23 00:17:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:16,508 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2018-11-23 00:17:16,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 00:17:16,509 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2018-11-23 00:17:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:16,509 INFO L225 Difference]: With dead ends: 77 [2018-11-23 00:17:16,510 INFO L226 Difference]: Without dead ends: 53 [2018-11-23 00:17:16,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-11-23 00:17:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-23 00:17:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-11-23 00:17:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-23 00:17:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-11-23 00:17:16,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2018-11-23 00:17:16,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:16,517 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-11-23 00:17:16,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 00:17:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-11-23 00:17:16,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-23 00:17:16,518 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:16,518 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:16,519 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:16,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:16,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2048440661, now seen corresponding path program 8 times [2018-11-23 00:17:16,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:16,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:16,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,520 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 147 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-11-23 00:17:16,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:16,617 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:16,617 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:16,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:16,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:16,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:16,628 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:16,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-11-23 00:17:16,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:16,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 148 proven. 64 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-11-23 00:17:16,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 3 proven. 209 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-11-23 00:17:16,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:16,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-23 00:17:16,867 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:16,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 00:17:16,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 00:17:16,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:16,868 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 21 states. [2018-11-23 00:17:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:16,913 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2018-11-23 00:17:16,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 00:17:16,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2018-11-23 00:17:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:16,915 INFO L225 Difference]: With dead ends: 83 [2018-11-23 00:17:16,915 INFO L226 Difference]: Without dead ends: 57 [2018-11-23 00:17:16,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-23 00:17:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-23 00:17:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-23 00:17:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-11-23 00:17:16,923 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2018-11-23 00:17:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:16,923 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-11-23 00:17:16,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 00:17:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-11-23 00:17:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-23 00:17:16,924 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:16,924 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:16,924 INFO L423 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:16,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash -820376725, now seen corresponding path program 9 times [2018-11-23 00:17:16,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:16,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:16,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:16,926 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-23 00:17:17,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,010 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:17,010 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:17,010 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:17,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,010 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:17,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 00:17:17,026 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 00:17:17,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 00:17:17,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:17,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-23 00:17:17,121 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 183 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-23 00:17:17,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:17,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-11-23 00:17:17,192 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:17,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 00:17:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 00:17:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:17,193 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2018-11-23 00:17:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:17,231 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-11-23 00:17:17,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 00:17:17,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2018-11-23 00:17:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:17,232 INFO L225 Difference]: With dead ends: 89 [2018-11-23 00:17:17,232 INFO L226 Difference]: Without dead ends: 61 [2018-11-23 00:17:17,233 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-11-23 00:17:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-23 00:17:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-23 00:17:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-23 00:17:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-11-23 00:17:17,238 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2018-11-23 00:17:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:17,239 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-11-23 00:17:17,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 00:17:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-11-23 00:17:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-23 00:17:17,239 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:17,239 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:17,240 INFO L423 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:17,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 233951019, now seen corresponding path program 10 times [2018-11-23 00:17:17,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:17,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:17,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,244 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-23 00:17:17,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,289 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:17,290 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:17,290 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:17,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,290 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:17,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:17,302 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:17,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-23 00:17:17,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-11-23 00:17:17,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:17,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-11-23 00:17:17,417 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 00:17:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 00:17:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-11-23 00:17:17,418 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 9 states. [2018-11-23 00:17:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:17,440 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-11-23 00:17:17,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 00:17:17,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2018-11-23 00:17:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:17,442 INFO L225 Difference]: With dead ends: 109 [2018-11-23 00:17:17,442 INFO L226 Difference]: Without dead ends: 104 [2018-11-23 00:17:17,442 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-11-23 00:17:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-23 00:17:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2018-11-23 00:17:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-23 00:17:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2018-11-23 00:17:17,451 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 58 [2018-11-23 00:17:17,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:17,452 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2018-11-23 00:17:17,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 00:17:17,452 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2018-11-23 00:17:17,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-23 00:17:17,453 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:17,453 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:17,453 INFO L423 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:17,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1348099759, now seen corresponding path program 11 times [2018-11-23 00:17:17,454 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:17,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:17,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,454 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-23 00:17:17,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:17,518 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:17,518 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:17,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,518 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:17,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:17,530 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:17,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-23 00:17:17,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:17,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-23 00:17:17,626 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-11-23 00:17:17,679 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:17,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-11-23 00:17:17,679 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:17,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 00:17:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 00:17:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-11-23 00:17:17,680 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 11 states. [2018-11-23 00:17:17,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:17,704 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2018-11-23 00:17:17,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 00:17:17,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2018-11-23 00:17:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:17,706 INFO L225 Difference]: With dead ends: 132 [2018-11-23 00:17:17,706 INFO L226 Difference]: Without dead ends: 127 [2018-11-23 00:17:17,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-11-23 00:17:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-11-23 00:17:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 105. [2018-11-23 00:17:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-23 00:17:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2018-11-23 00:17:17,718 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 81 [2018-11-23 00:17:17,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:17,718 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2018-11-23 00:17:17,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 00:17:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2018-11-23 00:17:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-23 00:17:17,719 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:17,720 INFO L402 BasicCegarLoop]: trace histogram [40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:17,720 INFO L423 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:17,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1467049301, now seen corresponding path program 12 times [2018-11-23 00:17:17,720 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:17,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:17,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:17,721 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 00:17:17,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,804 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:17,804 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:17,804 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:17,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:17,804 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:17,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 00:17:17,826 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 00:17:17,863 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 00:17:17,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:17,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 00:17:17,929 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1742 backedges. 0 proven. 1342 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-11-23 00:17:18,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:18,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-11-23 00:17:18,046 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:18,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-23 00:17:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-23 00:17:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-11-23 00:17:18,047 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 13 states. [2018-11-23 00:17:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:18,082 INFO L93 Difference]: Finished difference Result 155 states and 161 transitions. [2018-11-23 00:17:18,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 00:17:18,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2018-11-23 00:17:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:18,083 INFO L225 Difference]: With dead ends: 155 [2018-11-23 00:17:18,084 INFO L226 Difference]: Without dead ends: 150 [2018-11-23 00:17:18,084 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-11-23 00:17:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-23 00:17:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 128. [2018-11-23 00:17:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-11-23 00:17:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2018-11-23 00:17:18,100 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 104 [2018-11-23 00:17:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:18,100 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2018-11-23 00:17:18,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-23 00:17:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2018-11-23 00:17:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-23 00:17:18,101 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:18,101 INFO L402 BasicCegarLoop]: trace histogram [50, 50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:18,102 INFO L423 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:18,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1018125521, now seen corresponding path program 13 times [2018-11-23 00:17:18,102 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,103 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-11-23 00:17:18,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:18,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:18,205 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:18,205 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:18,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:18,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:18,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:18,216 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:18,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-11-23 00:17:18,338 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2018-11-23 00:17:18,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:18,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-11-23 00:17:18,446 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:18,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-23 00:17:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-23 00:17:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-11-23 00:17:18,447 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 15 states. [2018-11-23 00:17:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:18,489 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2018-11-23 00:17:18,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 00:17:18,490 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 127 [2018-11-23 00:17:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:18,491 INFO L225 Difference]: With dead ends: 178 [2018-11-23 00:17:18,491 INFO L226 Difference]: Without dead ends: 173 [2018-11-23 00:17:18,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-11-23 00:17:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-23 00:17:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2018-11-23 00:17:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-23 00:17:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2018-11-23 00:17:18,504 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 127 [2018-11-23 00:17:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:18,504 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2018-11-23 00:17:18,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-23 00:17:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2018-11-23 00:17:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-23 00:17:18,506 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:18,506 INFO L402 BasicCegarLoop]: trace histogram [60, 60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:18,506 INFO L423 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:18,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1416411605, now seen corresponding path program 14 times [2018-11-23 00:17:18,506 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:18,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:18,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,507 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-11-23 00:17:18,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:18,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:18,601 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:18,601 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:18,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:18,601 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:18,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:18,609 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:18,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-11-23 00:17:18,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:18,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-11-23 00:17:18,785 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3951 backedges. 0 proven. 3351 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-11-23 00:17:18,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:18,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-11-23 00:17:18,863 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:18,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 00:17:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 00:17:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-11-23 00:17:18,864 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand 17 states. [2018-11-23 00:17:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:18,921 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2018-11-23 00:17:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 00:17:18,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 150 [2018-11-23 00:17:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:18,925 INFO L225 Difference]: With dead ends: 201 [2018-11-23 00:17:18,925 INFO L226 Difference]: Without dead ends: 196 [2018-11-23 00:17:18,925 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 286 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-11-23 00:17:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-11-23 00:17:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 174. [2018-11-23 00:17:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-23 00:17:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 181 transitions. [2018-11-23 00:17:18,947 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 181 transitions. Word has length 150 [2018-11-23 00:17:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:18,947 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 181 transitions. [2018-11-23 00:17:18,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 00:17:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 181 transitions. [2018-11-23 00:17:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-23 00:17:18,949 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:18,949 INFO L402 BasicCegarLoop]: trace histogram [70, 70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:18,949 INFO L423 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:18,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1492973649, now seen corresponding path program 15 times [2018-11-23 00:17:18,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:18,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:18,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:18,950 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-11-23 00:17:19,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:19,084 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:19,084 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:19,084 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:19,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:19,085 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:19,092 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 00:17:19,092 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-23 00:17:19,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 00:17:19,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:19,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-11-23 00:17:19,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5390 backedges. 0 proven. 4690 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2018-11-23 00:17:19,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:19,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-11-23 00:17:19,341 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:19,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-23 00:17:19,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-23 00:17:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-11-23 00:17:19,342 INFO L87 Difference]: Start difference. First operand 174 states and 181 transitions. Second operand 19 states. [2018-11-23 00:17:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:19,412 INFO L93 Difference]: Finished difference Result 224 states and 233 transitions. [2018-11-23 00:17:19,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-23 00:17:19,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 173 [2018-11-23 00:17:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:19,413 INFO L225 Difference]: With dead ends: 224 [2018-11-23 00:17:19,414 INFO L226 Difference]: Without dead ends: 219 [2018-11-23 00:17:19,414 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 330 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-11-23 00:17:19,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-11-23 00:17:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-11-23 00:17:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-11-23 00:17:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-11-23 00:17:19,429 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 173 [2018-11-23 00:17:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:19,429 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-11-23 00:17:19,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-23 00:17:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-11-23 00:17:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-11-23 00:17:19,430 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:19,430 INFO L402 BasicCegarLoop]: trace histogram [80, 80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:19,430 INFO L423 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:19,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1547162027, now seen corresponding path program 16 times [2018-11-23 00:17:19,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:19,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:19,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:19,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:19,431 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-23 00:17:19,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:19,590 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:19,590 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:19,590 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:19,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:19,590 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/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 [2018-11-23 00:17:19,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:19,598 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 00:17:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:19,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-23 00:17:19,756 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7052 backedges. 0 proven. 6252 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2018-11-23 00:17:19,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:19,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-11-23 00:17:19,866 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:19,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-23 00:17:19,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-23 00:17:19,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:19,867 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 21 states. [2018-11-23 00:17:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:19,922 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2018-11-23 00:17:19,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-23 00:17:19,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 196 [2018-11-23 00:17:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:19,924 INFO L225 Difference]: With dead ends: 247 [2018-11-23 00:17:19,924 INFO L226 Difference]: Without dead ends: 242 [2018-11-23 00:17:19,924 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 374 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-11-23 00:17:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2018-11-23 00:17:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-23 00:17:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 229 transitions. [2018-11-23 00:17:19,943 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 229 transitions. Word has length 196 [2018-11-23 00:17:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:19,944 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 229 transitions. [2018-11-23 00:17:19,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-23 00:17:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 229 transitions. [2018-11-23 00:17:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-23 00:17:19,945 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:19,946 INFO L402 BasicCegarLoop]: trace histogram [90, 90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:19,946 INFO L423 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:19,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:19,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1463389231, now seen corresponding path program 17 times [2018-11-23 00:17:19,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:19,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:17:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:19,947 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-23 00:17:20,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:20,104 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 00:17:20,104 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-23 00:17:20,104 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-23 00:17:20,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:17:20,105 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:17:20,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 00:17:20,112 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-23 00:17:20,231 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-11-23 00:17:20,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:17:20,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:17:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-23 00:17:20,390 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 00:17:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8937 backedges. 0 proven. 8037 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2018-11-23 00:17:20,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 00:17:20,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-11-23 00:17:20,504 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 00:17:20,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-23 00:17:20,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-23 00:17:20,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-11-23 00:17:20,505 INFO L87 Difference]: Start difference. First operand 220 states and 229 transitions. Second operand 23 states. [2018-11-23 00:17:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:20,616 INFO L93 Difference]: Finished difference Result 270 states and 281 transitions. [2018-11-23 00:17:20,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-23 00:17:20,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 219 [2018-11-23 00:17:20,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:20,617 INFO L225 Difference]: With dead ends: 270 [2018-11-23 00:17:20,617 INFO L226 Difference]: Without dead ends: 265 [2018-11-23 00:17:20,618 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 418 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-11-23 00:17:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-11-23 00:17:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 243. [2018-11-23 00:17:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-11-23 00:17:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 253 transitions. [2018-11-23 00:17:20,643 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 253 transitions. Word has length 219 [2018-11-23 00:17:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:20,643 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 253 transitions. [2018-11-23 00:17:20,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-23 00:17:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 253 transitions. [2018-11-23 00:17:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-23 00:17:20,645 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 00:17:20,645 INFO L402 BasicCegarLoop]: trace histogram [100, 100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 00:17:20,646 INFO L423 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 00:17:20,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:17:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1649132245, now seen corresponding path program 18 times [2018-11-23 00:17:20,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 00:17:20,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:20,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:17:20,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:17:20,647 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 00:17:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:17:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11045 backedges. 11036 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-23 00:17:23,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 00:17:23,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-11-23 00:17:23,498 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 00:17:23,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-11-23 00:17:23,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-11-23 00:17:23,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-11-23 00:17:23,500 INFO L87 Difference]: Start difference. First operand 243 states and 253 transitions. Second operand 105 states. [2018-11-23 00:17:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:17:25,246 INFO L93 Difference]: Finished difference Result 9783 states and 10243 transitions. [2018-11-23 00:17:25,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-11-23 00:17:25,246 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 242 [2018-11-23 00:17:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 00:17:25,246 INFO L225 Difference]: With dead ends: 9783 [2018-11-23 00:17:25,246 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 00:17:25,257 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-11-23 00:17:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 00:17:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 00:17:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 00:17:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 00:17:25,258 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 242 [2018-11-23 00:17:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 00:17:25,258 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:17:25,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-11-23 00:17:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 00:17:25,259 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 00:17:25,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 00:17:26,442 WARN L180 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-11-23 00:17:30,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,573 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,578 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,586 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,641 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:30,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,038 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,321 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,394 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,410 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,472 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,791 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,851 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:31,957 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,052 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,155 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,213 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,439 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,500 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,676 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,895 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:32,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,014 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,310 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,369 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:33,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,676 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:34,902 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,135 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,550 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,633 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,747 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:35,954 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:36,171 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:36,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:36,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:37,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:37,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:37,661 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:37,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:37,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:38,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:38,311 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:38,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:38,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:39,391 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:39,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:40,112 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:40,264 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:40,353 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:40,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:40,858 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:41,792 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:41,806 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:41,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:41,949 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:42,077 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:42,851 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:42,909 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:43,129 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:43,144 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:43,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:43,349 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,015 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,201 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,864 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:44,895 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:45,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:45,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:46,040 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:46,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:46,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:46,875 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:46,972 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:47,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:48,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:49,142 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:50,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:50,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:51,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:51,443 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:51,691 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,106 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,688 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:52,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:53,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:54,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:54,518 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:54,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:54,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:56,243 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:56,819 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:57,090 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:57,145 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:57,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:57,723 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:57,971 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:58,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:58,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:58,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:59,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:17:59,841 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:00,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:00,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:01,597 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:01,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:03,369 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:03,413 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:03,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:04,178 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:05,311 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:05,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:05,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:06,504 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:06,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:06,731 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:06,889 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:07,029 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:07,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:07,907 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:08,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:08,515 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:11,270 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:11,489 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:11,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:11,773 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:12,942 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:14,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:15,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:17,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:20,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:23,337 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:29,490 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:31,201 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:31,515 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:32,052 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:34,970 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:35,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:36,794 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:40,270 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:47,125 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-11-23 00:18:53,978 WARN L180 SmtUtils]: Spent 1.46 m on a formula simplification. DAG size of input: 5173 DAG size of output: 2371 [2018-11-23 00:18:57,610 WARN L180 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-11-23 00:19:57,040 WARN L180 SmtUtils]: Spent 59.41 s on a formula simplification. DAG size of input: 2349 DAG size of output: 364 [2018-11-23 00:19:57,043 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 00:19:57,043 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 00:19:57,043 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 00:19:57,043 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 00:19:57,043 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 00:19:57,043 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 00:19:57,043 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point L17-2(lines 17 21) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L444 ceAbstractionStarter]: At program point L17-3(lines 17 21) the Hoare annotation is: (let ((.cse0 (<= 10 main_~m~0)) (.cse1 (<= 10 main_~n~0))) (or (and (<= 30 main_~k~0) (<= main_~i~0 3) .cse0 .cse1) (and .cse0 (<= 100 main_~k~0) .cse1) (and .cse0 (<= 40 main_~k~0) (<= main_~i~0 4) .cse1) (and .cse0 (<= 0 main_~k~0) (<= main_~i~0 0) .cse1) (and .cse0 (<= 60 main_~k~0) (<= main_~i~0 6) .cse1) (and .cse0 (<= 10 main_~k~0) (<= main_~i~0 1) .cse1) (and (<= 80 main_~k~0) .cse0 (<= main_~i~0 8) .cse1) (and (<= 50 main_~k~0) .cse0 (<= main_~i~0 5) .cse1) (and .cse0 (<= main_~i~0 9) .cse1 (<= 90 main_~k~0)) (and (<= 70 main_~k~0) .cse0 (<= main_~i~0 7) .cse1) (and .cse0 (<= 20 main_~k~0) (<= main_~i~0 2) .cse1))) [2018-11-23 00:19:57,044 INFO L444 ceAbstractionStarter]: At program point L17-4(lines 17 21) the Hoare annotation is: (and (<= 10 main_~m~0) (<= 100 main_~k~0) (<= 10 main_~n~0)) [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-11-23 00:19:57,044 INFO L448 ceAbstractionStarter]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2018-11-23 00:19:57,045 INFO L444 ceAbstractionStarter]: At program point L18-3(lines 18 20) the Hoare annotation is: (let ((.cse8 (<= 10 main_~m~0)) (.cse15 (<= main_~j~0 7))) (let ((.cse18 (<= main_~j~0 3)) (.cse34 (<= main_~j~0 9)) (.cse31 (<= main_~j~0 0)) (.cse26 (<= main_~j~0 4)) (.cse7 (<= main_~j~0 5)) (.cse20 (<= main_~j~0 8)) (.cse35 (<= main_~j~0 1)) (.cse39 (<= main_~j~0 2)) (.cse30 (<= main_~j~0 6)) (.cse3 (and .cse8 .cse15)) (.cse2 (<= 10 main_~n~0))) (let ((.cse25 (<= 40 main_~k~0)) (.cse16 (<= 80 main_~k~0)) (.cse33 (and .cse3 .cse2)) (.cse38 (<= 10 main_~k~0)) (.cse37 (<= 70 main_~k~0)) (.cse21 (<= main_~i~0 0)) (.cse12 (<= 30 main_~k~0)) (.cse13 (<= main_~i~0 3)) (.cse22 (and .cse8 .cse30)) (.cse36 (<= 20 main_~k~0)) (.cse27 (and .cse8 .cse39)) (.cse6 (and .cse8 .cse35 .cse2)) (.cse40 (<= 60 main_~k~0)) (.cse32 (and .cse8 .cse2)) (.cse4 (<= main_~i~0 6)) (.cse10 (<= main_~i~0 4)) (.cse23 (and .cse20 .cse8)) (.cse0 (and .cse7 .cse8)) (.cse28 (and .cse8 .cse26 .cse2)) (.cse1 (<= main_~i~0 7)) (.cse9 (<= main_~i~0 1)) (.cse41 (<= 50 main_~k~0)) (.cse5 (<= (+ main_~i~0 1) main_~n~0)) (.cse14 (and .cse8 .cse31)) (.cse42 (<= 90 main_~k~0)) (.cse19 (<= main_~i~0 2)) (.cse17 (<= main_~i~0 8)) (.cse24 (and .cse8 .cse34)) (.cse11 (<= main_~i~0 5)) (.cse29 (and .cse8 .cse18))) (or (and (<= 75 main_~k~0) .cse0 .cse1 .cse2) (and (<= 67 main_~k~0) .cse3 .cse4 .cse2) (and (and .cse5 .cse6) (<= 91 main_~k~0)) (and .cse7 .cse8 (<= 15 main_~k~0) .cse9 .cse2) (and .cse0 (<= 45 main_~k~0) .cse10 .cse2) (and .cse11 .cse6 (<= 51 main_~k~0)) (and .cse12 .cse13 .cse14 .cse2) (and .cse8 .cse9 (<= 17 main_~k~0) .cse15 .cse2) (and .cse16 .cse14 .cse17 .cse2) (and (<= 23 main_~k~0) .cse8 .cse18 .cse19 .cse2) (and .cse20 .cse8 (<= 8 main_~k~0) .cse21 .cse2) (and (<= 66 main_~k~0) .cse22 .cse4 .cse2) (and .cse22 .cse10 (<= 46 main_~k~0) .cse2) (and .cse13 (<= 38 main_~k~0) .cse23 .cse2) (and (<= 86 main_~k~0) .cse22 .cse17 .cse2) (and .cse24 .cse10 (<= 49 main_~k~0) .cse2) (and .cse25 .cse14 .cse10 .cse2) (and .cse6 .cse10 (<= 41 main_~k~0)) (and (<= 69 main_~k~0) .cse24 .cse4 .cse2) (and .cse8 .cse26 .cse21 (<= 4 main_~k~0) .cse2) (and .cse27 .cse1 (<= 72 main_~k~0) .cse2) (and .cse28 (<= 84 main_~k~0) .cse17) (and (<= 82 main_~k~0) .cse27 .cse17 .cse2) (and (<= 63 main_~k~0) .cse29 .cse4 .cse2) (and .cse8 (<= 6 main_~k~0) .cse21 .cse2 .cse30) (and .cse8 (<= 0 main_~k~0) .cse31 .cse21 .cse2) (and (and .cse5 .cse0 .cse2) (<= 95 main_~k~0)) (and (and .cse32 .cse5) (<= 100 main_~k~0)) (and (and .cse5 .cse33) (<= 97 main_~k~0)) (and (and .cse5 .cse29 .cse2) (<= 93 main_~k~0)) (and .cse10 .cse28 (<= 44 main_~k~0)) (and .cse8 (<= 9 main_~k~0) .cse34 .cse21 .cse2) (and (<= 21 main_~k~0) .cse8 .cse35 .cse19 .cse2) (and .cse0 (<= 55 main_~k~0) .cse11 .cse2) (and (and .cse5 .cse22 .cse2) (<= 96 main_~k~0)) (and .cse10 .cse27 (<= 42 main_~k~0) .cse2) (and .cse13 .cse25 .cse8 .cse2) (and .cse22 .cse1 .cse2 (<= 76 main_~k~0)) (and .cse8 .cse36 .cse9 .cse2) (and .cse29 .cse1 .cse2 (<= 73 main_~k~0)) (and (<= 56 main_~k~0) .cse22 .cse11 .cse2) (and (<= 54 main_~k~0) .cse28 .cse11) (and .cse37 .cse14 .cse1 .cse2) (and .cse13 (<= 32 main_~k~0) .cse27 .cse2) (and .cse23 .cse17 .cse2 (<= 88 main_~k~0)) (and .cse8 .cse38 .cse21 .cse2) (and (<= 59 main_~k~0) .cse24 .cse11 .cse2) (and .cse11 .cse3 .cse2 (<= 57 main_~k~0)) (and .cse33 .cse1 (<= 77 main_~k~0)) (and .cse8 .cse35 .cse21 .cse2 (<= 1 main_~k~0)) (and .cse13 .cse8 .cse35 .cse2 (<= 31 main_~k~0)) (and .cse8 (<= 22 main_~k~0) .cse19 .cse39 .cse2) (and (and .cse5 .cse23 .cse2) (<= 98 main_~k~0)) (and .cse40 .cse14 .cse4 .cse2) (and (<= 11 main_~k~0) .cse8 .cse35 .cse9 .cse2) (and .cse7 .cse8 (<= 5 main_~k~0) .cse21 .cse2) (and .cse16 .cse32 .cse1) (and .cse13 .cse0 (<= 35 main_~k~0) .cse2) (and .cse8 (<= 29 main_~k~0) .cse19 .cse34 .cse2) (and (<= 37 main_~k~0) .cse13 .cse3 .cse2) (and .cse17 (<= 87 main_~k~0) .cse33) (and (<= 26 main_~k~0) .cse8 .cse19 .cse2 .cse30) (and .cse10 .cse29 (<= 43 main_~k~0) .cse2) (and .cse41 .cse8 .cse10 .cse2) (and (and .cse5 .cse28) (<= 94 main_~k~0)) (and .cse23 (<= 78 main_~k~0) .cse1 .cse2) (and (<= 33 main_~k~0) .cse13 .cse29 .cse2) (and .cse8 .cse38 .cse9 .cse31 .cse2) (and .cse6 .cse4 (<= 61 main_~k~0)) (and (<= 92 main_~k~0) (and .cse5 .cse27 .cse2)) (and .cse7 .cse8 (<= 25 main_~k~0) .cse19 .cse2) (and .cse8 (<= 7 main_~k~0) .cse15 .cse21 .cse2) (and .cse37 .cse8 .cse4 .cse2) (and .cse8 .cse18 (<= 3 main_~k~0) .cse21 .cse2) (and (<= 2 main_~k~0) .cse8 .cse39 .cse21 .cse2) (and .cse13 .cse28 (<= 34 main_~k~0)) (and (<= 83 main_~k~0) .cse29 .cse17 .cse2) (and .cse24 .cse1 (<= 79 main_~k~0) .cse2) (and .cse13 .cse24 (<= 39 main_~k~0) .cse2) (and .cse6 (<= 71 main_~k~0) .cse1) (and .cse12 .cse8 .cse19 .cse2) (and .cse23 (<= 68 main_~k~0) .cse4 .cse2) (and (<= 58 main_~k~0) .cse23 .cse11 .cse2) (and .cse8 .cse19 .cse26 .cse2 (<= 24 main_~k~0)) (and .cse13 (<= 36 main_~k~0) .cse22 .cse2) (and .cse0 (<= 65 main_~k~0) .cse4 .cse2) (and .cse8 .cse9 .cse39 (<= 12 main_~k~0) .cse2) (and .cse8 .cse36 .cse19 .cse31 .cse2) (and (<= 14 main_~k~0) .cse8 .cse9 .cse26 .cse2) (and .cse27 (<= 62 main_~k~0) .cse4 .cse2) (and .cse27 .cse11 (<= 52 main_~k~0) .cse2) (and (<= 81 main_~k~0) .cse17 .cse6) (and .cse8 .cse9 .cse34 .cse2 (<= 19 main_~k~0)) (and .cse10 (<= 47 main_~k~0) .cse3 .cse2) (and .cse8 .cse40 .cse11 .cse2) (and .cse32 .cse17 .cse42) (and (<= 64 main_~k~0) .cse28 .cse4) (and (<= 99 main_~k~0) (and .cse5 .cse24 .cse2)) (and .cse10 (<= 48 main_~k~0) .cse23 .cse2) (and (<= 28 main_~k~0) .cse20 .cse8 .cse19 .cse2) (and .cse8 .cse18 .cse9 (<= 13 main_~k~0) .cse2) (and .cse20 .cse8 (<= 18 main_~k~0) .cse9 .cse2) (and .cse0 (<= 85 main_~k~0) .cse17 .cse2) (and (<= 74 main_~k~0) .cse28 .cse1) (and (<= 16 main_~k~0) .cse8 .cse9 .cse2 .cse30) (and .cse41 .cse14 .cse11 .cse2) (and (and .cse5 .cse14 .cse2) .cse42) (and .cse8 .cse19 .cse15 .cse2 (<= 27 main_~k~0)) (and (<= 89 main_~k~0) .cse17 .cse24 .cse2) (and (<= 53 main_~k~0) .cse11 .cse29 .cse2))))) [2018-11-23 00:19:57,045 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 00:19:57,045 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 00:19:57,045 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 00:19:57,045 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 00:19:57,045 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 00:19:57,046 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 00:19:57,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:19:57 BoogieIcfgContainer [2018-11-23 00:19:57,076 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 00:19:57,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 00:19:57,077 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 00:19:57,077 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 00:19:57,078 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:17:14" (3/4) ... [2018-11-23 00:19:57,081 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 00:19:57,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 00:19:57,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 00:19:57,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 00:19:57,091 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2018-11-23 00:19:57,091 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-11-23 00:19:57,091 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 00:19:57,134 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7edb4f3e-303b-4ae3-bd02-eae5f901ee94/bin-2019/utaipan/witness.graphml [2018-11-23 00:19:57,134 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 00:19:57,134 INFO L168 Benchmark]: Toolchain (without parser) took 163519.53 ms. Allocated memory was 1.0 GB in the beginning and 4.8 GB in the end (delta: 3.8 GB). Free memory was 959.2 MB in the beginning and 4.0 GB in the end (delta: -3.0 GB). Peak memory consumption was 755.4 MB. Max. memory is 11.5 GB. [2018-11-23 00:19:57,135 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 00:19:57,135 INFO L168 Benchmark]: CACSL2BoogieTranslator took 152.12 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 00:19:57,136 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.09 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 943.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-23 00:19:57,136 INFO L168 Benchmark]: Boogie Preprocessor took 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 943.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 00:19:57,136 INFO L168 Benchmark]: RCFGBuilder took 202.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-23 00:19:57,136 INFO L168 Benchmark]: TraceAbstraction took 163075.54 ms. Allocated memory was 1.2 GB in the beginning and 4.8 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 4.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.2 GB. Max. memory is 11.5 GB. [2018-11-23 00:19:57,137 INFO L168 Benchmark]: Witness Printer took 57.03 ms. Allocated memory is still 4.8 GB. Free memory is still 4.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 00:19:57,138 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 152.12 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.09 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 943.1 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.04 ms. Allocated memory is still 1.0 GB. Free memory is still 943.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 202.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.6 MB). Free memory was 943.1 MB in the beginning and 1.1 GB in the end (delta: -164.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 163075.54 ms. Allocated memory was 1.2 GB in the beginning and 4.8 GB in the end (delta: 3.7 GB). Free memory was 1.1 GB in the beginning and 4.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.2 GB. Max. memory is 11.5 GB. * Witness Printer took 57.03 ms. Allocated memory is still 4.8 GB. Free memory is still 4.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((((((((30 <= k && i <= 3) && 10 <= m) && 10 <= n) || ((10 <= m && 100 <= k) && 10 <= n)) || (((10 <= m && 40 <= k) && i <= 4) && 10 <= n)) || (((10 <= m && 0 <= k) && i <= 0) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 6) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 1) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 8) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 5) && 10 <= n)) || (((10 <= m && i <= 9) && 10 <= n) && 90 <= k)) || (((70 <= k && 10 <= m) && i <= 7) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 2) && 10 <= n) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((75 <= k && j <= 5 && 10 <= m) && i <= 7) && 10 <= n) || (((67 <= k && 10 <= m && j <= 7) && i <= 6) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 1) && 10 <= n) && 91 <= k)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 1) && 10 <= n) && 51 <= k)) || (((30 <= k && i <= 3) && 10 <= m && j <= 0) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || (((80 <= k && 10 <= m && j <= 0) && i <= 8) && 10 <= n)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || (((66 <= k && 10 <= m && j <= 6) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 6) && i <= 4) && 46 <= k) && 10 <= n)) || (((i <= 3 && 38 <= k) && j <= 8 && 10 <= m) && 10 <= n)) || (((86 <= k && 10 <= m && j <= 6) && i <= 8) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 4) && 49 <= k) && 10 <= n)) || (((40 <= k && 10 <= m && j <= 0) && i <= 4) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 4) && 41 <= k)) || (((69 <= k && 10 <= m && j <= 9) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || ((((10 <= m && j <= 2) && i <= 7) && 72 <= k) && 10 <= n)) || ((((10 <= m && j <= 4) && 10 <= n) && 84 <= k) && i <= 8)) || (((82 <= k && 10 <= m && j <= 2) && i <= 8) && 10 <= n)) || (((63 <= k && 10 <= m && j <= 3) && i <= 6) && 10 <= n)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || (((i + 1 <= n && j <= 5 && 10 <= m) && 10 <= n) && 95 <= k)) || (((10 <= m && 10 <= n) && i + 1 <= n) && 100 <= k)) || ((i + 1 <= n && (10 <= m && j <= 7) && 10 <= n) && 97 <= k)) || (((i + 1 <= n && 10 <= m && j <= 3) && 10 <= n) && 93 <= k)) || ((i <= 4 && (10 <= m && j <= 4) && 10 <= n) && 44 <= k)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 6) && 10 <= n) && 96 <= k)) || (((i <= 4 && 10 <= m && j <= 2) && 42 <= k) && 10 <= n)) || (((i <= 3 && 40 <= k) && 10 <= m) && 10 <= n)) || ((((10 <= m && j <= 6) && i <= 7) && 10 <= n) && 76 <= k)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 7) && 10 <= n) && 73 <= k)) || (((56 <= k && 10 <= m && j <= 6) && i <= 5) && 10 <= n)) || ((54 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 5)) || (((70 <= k && 10 <= m && j <= 0) && i <= 7) && 10 <= n)) || (((i <= 3 && 32 <= k) && 10 <= m && j <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && i <= 8) && 10 <= n) && 88 <= k)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || (((59 <= k && 10 <= m && j <= 9) && i <= 5) && 10 <= n)) || (((i <= 5 && 10 <= m && j <= 7) && 10 <= n) && 57 <= k)) || ((((10 <= m && j <= 7) && 10 <= n) && i <= 7) && 77 <= k)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((i <= 3 && 10 <= m) && j <= 1) && 10 <= n) && 31 <= k)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || (((i + 1 <= n && j <= 8 && 10 <= m) && 10 <= n) && 98 <= k)) || (((60 <= k && 10 <= m && j <= 0) && i <= 6) && 10 <= n)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || ((80 <= k && 10 <= m && 10 <= n) && i <= 7)) || (((i <= 3 && j <= 5 && 10 <= m) && 35 <= k) && 10 <= n)) || ((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n)) || (((37 <= k && i <= 3) && 10 <= m && j <= 7) && 10 <= n)) || ((i <= 8 && 87 <= k) && (10 <= m && j <= 7) && 10 <= n)) || ((((26 <= k && 10 <= m) && i <= 2) && 10 <= n) && j <= 6)) || (((i <= 4 && 10 <= m && j <= 3) && 43 <= k) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 4) && 10 <= n)) || ((i + 1 <= n && (10 <= m && j <= 4) && 10 <= n) && 94 <= k)) || ((((j <= 8 && 10 <= m) && 78 <= k) && i <= 7) && 10 <= n)) || (((33 <= k && i <= 3) && 10 <= m && j <= 3) && 10 <= n)) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 6) && 61 <= k)) || (92 <= k && (i + 1 <= n && 10 <= m && j <= 2) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || ((i <= 3 && (10 <= m && j <= 4) && 10 <= n) && 34 <= k)) || (((83 <= k && 10 <= m && j <= 3) && i <= 8) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 79 <= k) && 10 <= n)) || (((i <= 3 && 10 <= m && j <= 9) && 39 <= k) && 10 <= n)) || ((((10 <= m && j <= 1) && 10 <= n) && 71 <= k) && i <= 7)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 68 <= k) && i <= 6) && 10 <= n)) || (((58 <= k && j <= 8 && 10 <= m) && i <= 5) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || (((i <= 3 && 36 <= k) && 10 <= m && j <= 6) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || ((((14 <= k && 10 <= m) && i <= 1) && j <= 4) && 10 <= n)) || ((((10 <= m && j <= 2) && 62 <= k) && i <= 6) && 10 <= n)) || ((((10 <= m && j <= 2) && i <= 5) && 52 <= k) && 10 <= n)) || ((81 <= k && i <= 8) && (10 <= m && j <= 1) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || (((i <= 4 && 47 <= k) && 10 <= m && j <= 7) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 5) && 10 <= n)) || (((10 <= m && 10 <= n) && i <= 8) && 90 <= k)) || ((64 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 6)) || (99 <= k && (i + 1 <= n && 10 <= m && j <= 9) && 10 <= n)) || (((i <= 4 && 48 <= k) && j <= 8 && 10 <= m) && 10 <= n)) || ((((28 <= k && j <= 8) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 85 <= k) && i <= 8) && 10 <= n)) || ((74 <= k && (10 <= m && j <= 4) && 10 <= n) && i <= 7)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || (((50 <= k && 10 <= m && j <= 0) && i <= 5) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || ((((10 <= m && i <= 2) && j <= 7) && 10 <= n) && 27 <= k)) || (((89 <= k && i <= 8) && 10 <= m && j <= 9) && 10 <= n)) || (((53 <= k && i <= 5) && 10 <= m && j <= 3) && 10 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 162.9s OverallTime, 20 OverallIterations, 100 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 151.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 657 SDtfs, 1051 SDslu, 2539 SDs, 0 SdLazy, 1123 SolverSat, 178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3146 GetRequests, 2671 SyntacticMatches, 62 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3630 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 206 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 5144 NumberOfFragments, 1995 HoareAnnotationTreeSize, 27 FomulaSimplifications, 5534241 FormulaSimplificationTreeSizeReduction, 88.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 158662 FormulaSimplificationTreeSizeReductionInter, 63.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 3145 NumberOfCodeBlocks, 3081 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 4529 ConstructedInterpolants, 0 QuantifiedInterpolants, 3075357 SizeOfPredicates, 49 NumberOfNonLiveVariables, 3447 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 54 InterpolantComputations, 3 PerfectInterpolantSequences, 26929/108396 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...