./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c3fbe1c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 a235c453e8d82f15e0f227470cffc0947c40dcd4 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:11:39,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:11:39,082 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:11:39,099 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:11:39,099 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:11:39,100 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:11:39,101 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:11:39,104 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:11:39,105 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:11:39,106 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:11:39,107 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:11:39,108 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:11:39,108 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:11:39,109 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:11:39,111 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:11:39,112 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:11:39,113 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:11:39,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:11:39,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:11:39,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:11:39,120 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:11:39,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:11:39,124 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 15:11:39,124 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 15:11:39,125 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 15:11:39,125 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 15:11:39,127 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 15:11:39,128 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 15:11:39,129 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 15:11:39,130 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 15:11:39,130 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 15:11:39,131 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 15:11:39,131 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 15:11:39,132 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 15:11:39,133 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 15:11:39,134 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 15:11:39,134 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 15:11:39,150 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:11:39,150 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:11:39,151 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:11:39,152 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 15:11:39,152 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 15:11:39,152 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 15:11:39,152 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 15:11:39,152 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 15:11:39,152 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 15:11:39,153 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 15:11:39,153 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 15:11:39,153 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:11:39,155 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 15:11:39,155 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:11:39,155 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 15:11:39,155 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:11:39,155 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:11:39,156 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:11:39,156 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:11:39,157 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 15:11:39,157 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:11:39,157 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:11:39,157 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:11:39,157 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:11:39,157 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:11:39,158 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:11:39,159 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:11:39,159 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:11:39,159 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:11:39,159 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:11:39,159 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 15:11:39,160 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:11:39,160 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:11:39,161 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:11:39,161 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> a235c453e8d82f15e0f227470cffc0947c40dcd4 [2018-10-22 15:11:39,214 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:11:39,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:11:39,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:11:39,233 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:11:39,233 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:11:39,234 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:11:39,291 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ee23f6c4c/4a8e5cafb57e4a318af1a21b50681920/FLAG04c9a2381 [2018-10-22 15:11:39,689 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:11:39,689 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:11:39,696 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ee23f6c4c/4a8e5cafb57e4a318af1a21b50681920/FLAG04c9a2381 [2018-10-22 15:11:39,711 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ee23f6c4c/4a8e5cafb57e4a318af1a21b50681920 [2018-10-22 15:11:39,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:11:39,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 15:11:39,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:11:39,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:11:39,725 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:11:39,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:39,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200f03aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39, skipping insertion in model container [2018-10-22 15:11:39,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:39,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:11:39,762 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:11:39,941 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:11:39,946 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:11:39,966 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:11:39,982 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:11:39,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39 WrapperNode [2018-10-22 15:11:39,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:11:39,984 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:11:39,984 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:11:39,984 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:11:39,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:11:40,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:11:40,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:11:40,009 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:11:40,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... [2018-10-22 15:11:40,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:11:40,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:11:40,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:11:40,033 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:11:40,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:40,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 15:11:40,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 15:11:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:11:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:11:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 15:11:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 15:11:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 15:11:40,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 15:11:40,424 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:11:40,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:40 BoogieIcfgContainer [2018-10-22 15:11:40,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:11:40,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:11:40,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:11:40,429 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:11:40,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:11:39" (1/3) ... [2018-10-22 15:11:40,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b28675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:11:40, skipping insertion in model container [2018-10-22 15:11:40,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:11:39" (2/3) ... [2018-10-22 15:11:40,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43b28675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:11:40, skipping insertion in model container [2018-10-22 15:11:40,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:40" (3/3) ... [2018-10-22 15:11:40,435 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum_true-unreach-call_true-termination.i [2018-10-22 15:11:40,455 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:11:40,475 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:11:40,504 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:11:40,574 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:11:40,575 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:11:40,575 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:11:40,576 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:11:40,579 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:11:40,579 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:11:40,579 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:11:40,579 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:11:40,579 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:11:40,605 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-22 15:11:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:11:40,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:40,619 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:40,621 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:40,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1152414567, now seen corresponding path program 1 times [2018-10-22 15:11:40,628 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:40,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:40,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:40,672 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:40,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:11:40,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:11:40,737 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:11:40,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:11:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:11:40,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:11:40,761 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-22 15:11:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:40,787 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-10-22 15:11:40,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:11:40,789 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-22 15:11:40,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:40,798 INFO L225 Difference]: With dead ends: 33 [2018-10-22 15:11:40,798 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 15:11:40,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:11:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 15:11:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 15:11:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:11:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:11:40,835 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 15:11:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:40,836 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:11:40,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:11:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:11:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:11:40,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:40,837 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:40,837 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:40,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1083883255, now seen corresponding path program 1 times [2018-10-22 15:11:40,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:40,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:40,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:40,840 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:40,847 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:11:40,847 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:11:40,847 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:11:40,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:40,862 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 15:11:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:40,907 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-10-22 15:11:40,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:40,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:40,908 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:40,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:40,918 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:40,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:41,011 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:41,078 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:11:41,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-10-22 15:11:41,078 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 15:11:41,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:11:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:11:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:11:41,080 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2018-10-22 15:11:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:41,132 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:11:41,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:11:41,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 15:11:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:41,134 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:11:41,134 INFO L226 Difference]: Without dead ends: 17 [2018-10-22 15:11:41,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:11:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-22 15:11:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-10-22 15:11:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:11:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 15:11:41,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-10-22 15:11:41,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:41,142 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 15:11:41,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:11:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 15:11:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:11:41,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:41,143 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:41,143 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:41,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1128913667, now seen corresponding path program 1 times [2018-10-22 15:11:41,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:41,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:41,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:41,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:41,147 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:41,157 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:11:41,157 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:11:41,157 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:11:41,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:41,178 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 15:11:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:41,223 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-10-22 15:11:41,225 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [15], [17], [19], [26], [29], [31], [37], [38], [39], [41] [2018-10-22 15:11:41,271 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 15:11:41,271 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 15:11:41,782 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 15:11:41,784 INFO L272 AbstractInterpreter]: Visited 14 different actions 96 times. Merged at 4 different actions 43 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 15:11:41,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:41,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 15:11:41,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:41,800 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:41,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:41,813 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:41,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:42,153 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-10-22 15:11:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:42,300 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:42,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:42,691 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:42,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:42,708 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 15:11:42,724 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 15:11:42,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:11:42,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-22 15:11:42,725 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:42,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:11:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:11:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:11:42,727 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2018-10-22 15:11:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:42,932 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-22 15:11:42,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:11:42,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2018-10-22 15:11:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:42,935 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:11:42,935 INFO L226 Difference]: Without dead ends: 19 [2018-10-22 15:11:42,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:11:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-22 15:11:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-22 15:11:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-22 15:11:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-22 15:11:42,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 15 [2018-10-22 15:11:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:42,942 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-22 15:11:42,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:11:42,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-22 15:11:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 15:11:42,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:42,943 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:42,943 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:42,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:42,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1694846089, now seen corresponding path program 2 times [2018-10-22 15:11:42,944 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:11:42,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:42,945 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:42,952 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:11:42,952 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:11:42,953 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:11:42,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:42,962 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 15:11:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:43,001 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:43,001 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:43,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:43,001 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:43,010 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:43,010 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:43,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:11:43,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:43,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:43,551 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:43,738 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) is different from true [2018-10-22 15:11:43,768 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-10-22 15:11:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2018-10-22 15:11:43,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:43,861 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:43,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:11:43,878 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 15:11:43,889 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 15:11:43,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:11:43,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-22 15:11:43,890 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:43,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:11:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:11:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=199, Unknown=2, NotChecked=58, Total=306 [2018-10-22 15:11:43,892 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-22 15:11:44,544 WARN L854 $PredicateComparison]: unable to prove that (and (or (< c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0))) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0))))) is different from true [2018-10-22 15:11:44,662 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2018-10-22 15:11:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:44,771 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-22 15:11:44,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:11:44,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-22 15:11:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:44,774 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:11:44,774 INFO L226 Difference]: Without dead ends: 28 [2018-10-22 15:11:44,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=388, Unknown=4, NotChecked=172, Total=650 [2018-10-22 15:11:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-22 15:11:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-22 15:11:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:11:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-22 15:11:44,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2018-10-22 15:11:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:44,783 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-22 15:11:44,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:11:44,784 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-22 15:11:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:11:44,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:44,785 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:44,785 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:44,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1287303683, now seen corresponding path program 3 times [2018-10-22 15:11:44,786 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:44,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:44,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:44,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:44,787 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:44,798 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:11:44,799 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:11:44,799 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:11:44,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:44,810 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 15:11:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:44,842 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:44,842 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:44,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:44,842 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:44,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:44,851 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:44,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:11:44,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:44,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:45,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:46,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:46,330 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:46,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:11:46,347 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 15:11:46,357 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 15:11:46,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:11:46,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2018-10-22 15:11:46,357 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:46,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:11:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:11:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:11:46,360 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 30 states. [2018-10-22 15:11:47,170 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2018-10-22 15:11:48,012 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2018-10-22 15:11:49,558 WARN L179 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2018-10-22 15:11:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:11:49,589 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-10-22 15:11:49,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:11:49,590 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 27 [2018-10-22 15:11:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:11:49,593 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:11:49,593 INFO L226 Difference]: Without dead ends: 46 [2018-10-22 15:11:49,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:11:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-22 15:11:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-22 15:11:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:11:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-22 15:11:49,606 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 27 [2018-10-22 15:11:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:11:49,607 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-22 15:11:49,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:11:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-22 15:11:49,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 15:11:49,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:11:49,608 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:11:49,608 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:11:49,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:11:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2121024643, now seen corresponding path program 4 times [2018-10-22 15:11:49,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 15:11:49,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:49,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:49,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:11:49,610 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 15:11:49,627 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-22 15:11:49,627 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-22 15:11:49,627 INFO L174 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-22 15:11:49,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:11:49,662 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-10-22 15:11:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:11:49,701 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 15:11:49,701 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 15:11:49,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:49,701 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 15:11:49,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:49,709 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:49,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:11:49,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:11:49,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:11:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:11:50,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 15:11:50,664 WARN L854 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2018-10-22 15:11:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 155 trivial. 10 not checked. [2018-10-22 15:11:53,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:11:53,123 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 15:11:53,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:11:53,147 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 15:11:53,177 ERROR L235 seRefinementStrategy]: Caught known exception: A non-linear fact was asserted to arithmetic in a linear logic. [2018-10-22 15:11:53,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:11:53,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2018-10-22 15:11:53,178 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 15:11:53,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:11:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:11:53,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1034, Unknown=2, NotChecked=64, Total=1190 [2018-10-22 15:11:53,180 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 35 states. [2018-10-22 15:11:54,399 WARN L854 $PredicateComparison]: unable to prove that (and (or (< c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0))) (= c_main_~i~0 8) (= c_main_~sum~0 (+ c_main_~i~0 28)) (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0))))) is different from true [2018-10-22 15:11:54,959 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-10-22 15:11:57,173 WARN L179 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2018-10-22 15:12:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:12:00,356 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2018-10-22 15:12:00,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:12:00,357 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 45 [2018-10-22 15:12:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:12:00,358 INFO L225 Difference]: With dead ends: 50 [2018-10-22 15:12:00,358 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 15:12:00,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=251, Invalid=3293, Unknown=4, NotChecked=234, Total=3782 [2018-10-22 15:12:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 15:12:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 15:12:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 15:12:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 15:12:00,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2018-10-22 15:12:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:12:00,362 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 15:12:00,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:12:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 15:12:00,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 15:12:00,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 15:12:05,063 WARN L179 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 99 DAG size of output: 19 [2018-10-22 15:12:05,128 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 15:12:05,128 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 15:12:05,129 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2018-10-22 15:12:05,129 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-10-22 15:12:05,130 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 15 17) no Hoare annotation was computed. [2018-10-22 15:12:05,130 INFO L421 ceAbstractionStarter]: At program point L15-4(lines 15 17) the Hoare annotation is: (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 main_~i~0) (* 2 main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< main_~i~0 main_~n~0) (< main_~n~0 main_~i~0))) (or (<= main_~i~0 main_~n~0) (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)))) [2018-10-22 15:12:05,130 INFO L421 ceAbstractionStarter]: At program point L15-5(lines 15 17) the Hoare annotation is: (= (* 2 main_~sum~0) (* (+ main_~n~0 1) main_~n~0)) [2018-10-22 15:12:05,130 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 15:12:05,130 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:12:05,130 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 15:12:05,130 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 15:12:05,131 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 15:12:05,131 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 15:12:05,140 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,141 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,141 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,141 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,147 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,148 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,148 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,148 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:12:05 BoogieIcfgContainer [2018-10-22 15:12:05,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:12:05,150 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 15:12:05,150 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 15:12:05,151 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 15:12:05,151 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:11:40" (3/4) ... [2018-10-22 15:12:05,156 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 15:12:05,162 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 15:12:05,163 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 15:12:05,163 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 15:12:05,168 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-10-22 15:12:05,168 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-10-22 15:12:05,169 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 15:12:05,225 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 15:12:05,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 15:12:05,226 INFO L168 Benchmark]: Toolchain (without parser) took 25508.07 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 286.3 MB). Free memory was 954.5 MB in the beginning and 1.0 GB in the end (delta: -80.4 MB). Peak memory consumption was 205.8 MB. Max. memory is 11.5 GB. [2018-10-22 15:12:05,227 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:12:05,227 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.70 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-10-22 15:12:05,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:12:05,228 INFO L168 Benchmark]: Boogie Preprocessor took 24.38 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 15:12:05,229 INFO L168 Benchmark]: RCFGBuilder took 391.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. [2018-10-22 15:12:05,229 INFO L168 Benchmark]: TraceAbstraction took 24723.99 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 142.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 84.2 MB). Peak memory consumption was 226.3 MB. Max. memory is 11.5 GB. [2018-10-22 15:12:05,230 INFO L168 Benchmark]: Witness Printer took 74.81 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. [2018-10-22 15:12:05,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 263.70 ms. Allocated memory is still 1.0 GB. Free memory was 954.5 MB in the beginning and 942.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.05 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.38 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 391.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24723.99 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 142.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 84.2 MB). Peak memory consumption was 226.3 MB. Max. memory is 11.5 GB. * Witness Printer took 74.81 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] * 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: 15]: Loop Invariant [2018-10-22 15:12:05,248 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,248 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,248 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,248 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,249 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,249 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,249 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] [2018-10-22 15:12:05,249 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~n~0,QUANTIFIED] Derived loop invariant: (forall main_~n~0 : int :: (2 * i + 2 * sum == (main_~n~0 + 1) * main_~n~0 || i < main_~n~0) || main_~n~0 < i) && (i <= n || 2 * sum == (n + 1) * n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 24.5s OverallTime, 6 OverallIterations, 12 TraceHistogramMax, 11.6s AutomataDifference, 0.0s DeadEndRemovalTime, 4.7s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 37 SDslu, 784 SDs, 0 SdLazy, 978 SolverSat, 112 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 129 SyntacticMatches, 13 SemanticMatches, 146 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 15.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 34 NumberOfFragments, 49 HoareAnnotationTreeSize, 15 FomulaSimplifications, 427 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 809 FormulaSimplificationTreeSizeReductionInter, 4.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.5s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 234 ConstructedInterpolants, 37 QuantifiedInterpolants, 71037 SizeOfPredicates, 18 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 155/472 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...