java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 10:06:58,447 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 10:06:58,449 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 10:06:58,461 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 10:06:58,462 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 10:06:58,463 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 10:06:58,464 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 10:06:58,466 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 10:06:58,467 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 10:06:58,468 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 10:06:58,469 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 10:06:58,469 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 10:06:58,470 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 10:06:58,471 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 10:06:58,472 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 10:06:58,473 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 10:06:58,474 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 10:06:58,476 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 10:06:58,478 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 10:06:58,480 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 10:06:58,481 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 10:06:58,482 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 10:06:58,484 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 10:06:58,485 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 10:06:58,485 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 10:06:58,486 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 10:06:58,487 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 10:06:58,488 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 10:06:58,489 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 10:06:58,490 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 10:06:58,490 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 10:06:58,491 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 10:06:58,493 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 10:06:58,509 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 10:06:58,509 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 10:06:58,510 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 10:06:58,510 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 10:06:58,510 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 10:06:58,511 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 10:06:58,511 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 10:06:58,511 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 10:06:58,511 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 10:06:58,512 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 10:06:58,512 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 10:06:58,512 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 10:06:58,513 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 10:06:58,513 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 10:06:58,513 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 10:06:58,513 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 10:06:58,514 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 10:06:58,514 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 10:06:58,514 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 10:06:58,514 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 10:06:58,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 10:06:58,515 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 10:06:58,515 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 10:06:58,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 10:06:58,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:06:58,515 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 10:06:58,516 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 10:06:58,516 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 10:06:58,516 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 10:06:58,516 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 10:06:58,516 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 10:06:58,517 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 10:06:58,517 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 10:06:58,517 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 10:06:58,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 10:06:58,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 10:06:58,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 10:06:58,580 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 10:06:58,580 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 10:06:58,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-23 10:06:58,647 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1aa0042f2/10c4a638494a40c7a78984d8dcc66756/FLAGcf191afb5 [2018-10-23 10:06:59,144 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 10:06:59,145 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-23 10:06:59,153 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1aa0042f2/10c4a638494a40c7a78984d8dcc66756/FLAGcf191afb5 [2018-10-23 10:06:59,172 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1aa0042f2/10c4a638494a40c7a78984d8dcc66756 [2018-10-23 10:06:59,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 10:06:59,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 10:06:59,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 10:06:59,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 10:06:59,191 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 10:06:59,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab32887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59, skipping insertion in model container [2018-10-23 10:06:59,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 10:06:59,232 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 10:06:59,416 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:06:59,420 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 10:06:59,440 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:06:59,460 INFO L193 MainTranslator]: Completed translation [2018-10-23 10:06:59,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59 WrapperNode [2018-10-23 10:06:59,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 10:06:59,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 10:06:59,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 10:06:59,462 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 10:06:59,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 10:06:59,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 10:06:59,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 10:06:59,488 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 10:06:59,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (1/1) ... [2018-10-23 10:06:59,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 10:06:59,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 10:06:59,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 10:06:59,514 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 10:06:59,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (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 [2018-10-23 10:06:59,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 10:06:59,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 10:06:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 10:06:59,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 10:06:59,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 10:06:59,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 10:06:59,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 10:06:59,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 10:07:00,078 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 10:07:00,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:07:00 BoogieIcfgContainer [2018-10-23 10:07:00,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 10:07:00,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 10:07:00,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 10:07:00,083 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 10:07:00,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:06:59" (1/3) ... [2018-10-23 10:07:00,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:07:00, skipping insertion in model container [2018-10-23 10:07:00,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:06:59" (2/3) ... [2018-10-23 10:07:00,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:07:00, skipping insertion in model container [2018-10-23 10:07:00,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:07:00" (3/3) ... [2018-10-23 10:07:00,087 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-23 10:07:00,097 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 10:07:00,105 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 10:07:00,118 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 10:07:00,154 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 10:07:00,155 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 10:07:00,155 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 10:07:00,155 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 10:07:00,155 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 10:07:00,156 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 10:07:00,156 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 10:07:00,156 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 10:07:00,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-10-23 10:07:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-23 10:07:00,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:00,185 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:00,187 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:00,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash -702630595, now seen corresponding path program 1 times [2018-10-23 10:07:00,196 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:00,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:00,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:00,322 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:07:00,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 10:07:00,322 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:07:00,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 10:07:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 10:07:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:07:00,348 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-10-23 10:07:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:00,374 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2018-10-23 10:07:00,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 10:07:00,376 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-23 10:07:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:00,385 INFO L225 Difference]: With dead ends: 43 [2018-10-23 10:07:00,386 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 10:07:00,389 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 [2018-10-23 10:07:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 10:07:00,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-23 10:07:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 10:07:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-23 10:07:00,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2018-10-23 10:07:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:00,432 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-23 10:07:00,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 10:07:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-23 10:07:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 10:07:00,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:00,434 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:00,434 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:00,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -972126638, now seen corresponding path program 1 times [2018-10-23 10:07:00,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:00,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,437 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:00,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:07:00,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 10:07:00,536 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:07:00,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 10:07:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 10:07:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 10:07:00,539 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-10-23 10:07:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:00,645 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-23 10:07:00,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 10:07:00,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-23 10:07:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:00,651 INFO L225 Difference]: With dead ends: 29 [2018-10-23 10:07:00,651 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 10:07:00,652 INFO L605 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 [2018-10-23 10:07:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 10:07:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-23 10:07:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 10:07:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-23 10:07:00,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-10-23 10:07:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:00,660 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-23 10:07:00,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 10:07:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-23 10:07:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-23 10:07:00,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:00,662 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:00,662 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:00,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:00,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1998515670, now seen corresponding path program 1 times [2018-10-23 10:07:00,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:00,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:00,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,664 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:00,736 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:07:00,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 10:07:00,737 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:07:00,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 10:07:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 10:07:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 10:07:00,738 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-23 10:07:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:00,822 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-23 10:07:00,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 10:07:00,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-23 10:07:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:00,824 INFO L225 Difference]: With dead ends: 34 [2018-10-23 10:07:00,825 INFO L226 Difference]: Without dead ends: 23 [2018-10-23 10:07:00,825 INFO L605 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 [2018-10-23 10:07:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-23 10:07:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-23 10:07:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 10:07:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-23 10:07:00,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2018-10-23 10:07:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:00,832 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-23 10:07:00,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 10:07:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-23 10:07:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 10:07:00,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:00,833 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:00,833 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:00,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:00,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1293803971, now seen corresponding path program 1 times [2018-10-23 10:07:00,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:00,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:00,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:00,835 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:00,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:00,905 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:00,906 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-23 10:07:00,907 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [21], [25], [28], [30], [32], [36], [43], [46], [48], [54], [55], [56], [58] [2018-10-23 10:07:00,955 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 10:07:00,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 10:07:02,168 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 10:07:02,169 INFO L272 AbstractInterpreter]: Visited 19 different actions 599 times. Merged at 8 different actions 374 times. Widened at 3 different actions 105 times. Found 61 fixpoints after 6 different actions. Largest state had 10 variables. [2018-10-23 10:07:02,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:02,190 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 10:07:02,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:02,191 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -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 [2018-10-23 10:07:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:02,201 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:07:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:02,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:02,430 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:02,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:02,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-10-23 10:07:02,692 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:02,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 10:07:02,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 10:07:02,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-23 10:07:02,695 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2018-10-23 10:07:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:02,786 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-23 10:07:02,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 10:07:02,789 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-23 10:07:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:02,789 INFO L225 Difference]: With dead ends: 39 [2018-10-23 10:07:02,790 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 10:07:02,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-23 10:07:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 10:07:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-23 10:07:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 10:07:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-23 10:07:02,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-10-23 10:07:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:02,797 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-23 10:07:02,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 10:07:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-23 10:07:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 10:07:02,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:02,799 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:02,799 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:02,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1379909750, now seen corresponding path program 2 times [2018-10-23 10:07:02,800 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:02,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:02,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:02,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:02,801 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:02,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:07:03,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:03,005 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:03,005 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:03,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:03,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:03,006 INFO L194 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 [2018-10-23 10:07:03,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:03,019 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:03,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:03,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:03,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 10:07:03,209 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 10:07:03,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:03,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2018-10-23 10:07:03,352 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:03,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 10:07:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 10:07:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-23 10:07:03,353 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-10-23 10:07:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:04,182 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-10-23 10:07:04,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 10:07:04,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-23 10:07:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:04,186 INFO L225 Difference]: With dead ends: 73 [2018-10-23 10:07:04,187 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 10:07:04,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-10-23 10:07:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 10:07:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2018-10-23 10:07:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-23 10:07:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-23 10:07:04,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 24 [2018-10-23 10:07:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:04,203 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-23 10:07:04,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 10:07:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-23 10:07:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-23 10:07:04,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:04,205 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:04,205 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:04,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1699386968, now seen corresponding path program 3 times [2018-10-23 10:07:04,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:04,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:04,208 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 10:07:04,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:04,347 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:04,347 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:04,347 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:04,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:04,348 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -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 [2018-10-23 10:07:04,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:07:04,362 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:07:04,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:07:04,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:04,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 10:07:04,487 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 10:07:04,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:04,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-10-23 10:07:04,658 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:04,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 10:07:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 10:07:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:07:04,659 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2018-10-23 10:07:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:04,764 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-10-23 10:07:04,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 10:07:04,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-10-23 10:07:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:04,765 INFO L225 Difference]: With dead ends: 72 [2018-10-23 10:07:04,765 INFO L226 Difference]: Without dead ends: 50 [2018-10-23 10:07:04,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:07:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-23 10:07:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2018-10-23 10:07:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-23 10:07:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-10-23 10:07:04,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2018-10-23 10:07:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-10-23 10:07:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 10:07:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-10-23 10:07:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-23 10:07:04,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:04,777 INFO L375 BasicCegarLoop]: trace histogram [10, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:04,778 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:04,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:04,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1734727982, now seen corresponding path program 4 times [2018-10-23 10:07:04,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:04,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:04,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:04,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:04,780 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 70 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-23 10:07:04,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:04,945 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:04,945 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:04,946 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:04,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:04,946 INFO L194 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 [2018-10-23 10:07:04,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:04,955 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:07:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:04,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 70 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-23 10:07:05,097 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 70 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-10-23 10:07:05,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:05,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-10-23 10:07:05,226 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:05,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 10:07:05,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 10:07:05,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-23 10:07:05,228 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2018-10-23 10:07:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:05,292 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-10-23 10:07:05,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 10:07:05,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-10-23 10:07:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:05,301 INFO L225 Difference]: With dead ends: 81 [2018-10-23 10:07:05,301 INFO L226 Difference]: Without dead ends: 56 [2018-10-23 10:07:05,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-23 10:07:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-23 10:07:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2018-10-23 10:07:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-23 10:07:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-10-23 10:07:05,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2018-10-23 10:07:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:05,311 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-10-23 10:07:05,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 10:07:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-10-23 10:07:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-23 10:07:05,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:05,313 INFO L375 BasicCegarLoop]: trace histogram [12, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:05,314 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:05,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2050902056, now seen corresponding path program 5 times [2018-10-23 10:07:05,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:05,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:05,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:05,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:05,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-23 10:07:05,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:05,626 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:05,626 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:05,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:05,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:05,626 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:05,636 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:05,636 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:05,655 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:05,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:05,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-23 10:07:05,786 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 101 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-23 10:07:05,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:05,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-10-23 10:07:05,911 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:05,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 10:07:05,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 10:07:05,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-23 10:07:05,913 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 15 states. [2018-10-23 10:07:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:06,246 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2018-10-23 10:07:06,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 10:07:06,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2018-10-23 10:07:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:06,251 INFO L225 Difference]: With dead ends: 90 [2018-10-23 10:07:06,251 INFO L226 Difference]: Without dead ends: 62 [2018-10-23 10:07:06,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-23 10:07:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-23 10:07:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2018-10-23 10:07:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-23 10:07:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-23 10:07:06,262 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-10-23 10:07:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:06,262 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-23 10:07:06,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 10:07:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-23 10:07:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-23 10:07:06,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:06,265 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:06,265 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:06,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1874097618, now seen corresponding path program 6 times [2018-10-23 10:07:06,266 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:06,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:06,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:06,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:06,267 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 138 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-23 10:07:06,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:06,417 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:06,417 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:06,418 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:06,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:06,418 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -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 [2018-10-23 10:07:06,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:07:06,426 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:07:06,480 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:07:06,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:06,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 138 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-23 10:07:06,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 138 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-23 10:07:06,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:06,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-10-23 10:07:06,799 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:06,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 10:07:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 10:07:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-23 10:07:06,800 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 17 states. [2018-10-23 10:07:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:06,884 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2018-10-23 10:07:06,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 10:07:06,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2018-10-23 10:07:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:06,895 INFO L225 Difference]: With dead ends: 99 [2018-10-23 10:07:06,895 INFO L226 Difference]: Without dead ends: 68 [2018-10-23 10:07:06,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-23 10:07:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-23 10:07:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-23 10:07:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-23 10:07:06,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-23 10:07:06,914 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2018-10-23 10:07:06,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:06,914 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-23 10:07:06,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 10:07:06,915 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-23 10:07:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-23 10:07:06,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:06,917 INFO L375 BasicCegarLoop]: trace histogram [16, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:06,917 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:06,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash -228116824, now seen corresponding path program 7 times [2018-10-23 10:07:06,919 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:06,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:06,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:06,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:06,921 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 181 proven. 77 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-23 10:07:07,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:07,059 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:07,059 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:07,060 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:07,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:07,060 INFO L194 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 [2018-10-23 10:07:07,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:07,073 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:07:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:07,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 181 proven. 77 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-23 10:07:07,749 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 181 proven. 77 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-23 10:07:07,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:07,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-10-23 10:07:07,863 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:07,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 10:07:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 10:07:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-23 10:07:07,864 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 19 states. [2018-10-23 10:07:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:08,004 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2018-10-23 10:07:08,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 10:07:08,007 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2018-10-23 10:07:08,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:08,008 INFO L225 Difference]: With dead ends: 108 [2018-10-23 10:07:08,008 INFO L226 Difference]: Without dead ends: 74 [2018-10-23 10:07:08,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-23 10:07:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-23 10:07:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2018-10-23 10:07:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-23 10:07:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2018-10-23 10:07:08,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2018-10-23 10:07:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:08,018 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2018-10-23 10:07:08,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 10:07:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2018-10-23 10:07:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-23 10:07:08,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:08,019 INFO L375 BasicCegarLoop]: trace histogram [18, 16, 16, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:08,019 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:08,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1690012462, now seen corresponding path program 8 times [2018-10-23 10:07:08,020 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:08,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:08,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:08,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:08,021 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 230 proven. 100 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-23 10:07:08,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:08,452 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:08,452 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:08,452 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:08,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:08,453 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:08,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:08,463 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:08,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:08,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:08,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 230 proven. 100 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-23 10:07:08,839 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 230 proven. 100 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-23 10:07:09,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:09,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-10-23 10:07:09,006 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:09,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 10:07:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 10:07:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:09,007 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 21 states. [2018-10-23 10:07:09,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:09,097 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2018-10-23 10:07:09,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 10:07:09,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2018-10-23 10:07:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:09,099 INFO L225 Difference]: With dead ends: 117 [2018-10-23 10:07:09,099 INFO L226 Difference]: Without dead ends: 80 [2018-10-23 10:07:09,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-23 10:07:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2018-10-23 10:07:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-23 10:07:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2018-10-23 10:07:09,110 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2018-10-23 10:07:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:09,110 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2018-10-23 10:07:09,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 10:07:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2018-10-23 10:07:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-23 10:07:09,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:09,112 INFO L375 BasicCegarLoop]: trace histogram [20, 18, 18, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:09,112 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:09,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 352073000, now seen corresponding path program 9 times [2018-10-23 10:07:09,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:09,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:09,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:09,114 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 285 proven. 126 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-23 10:07:09,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:09,326 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:09,326 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:09,326 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:09,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:09,326 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -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 [2018-10-23 10:07:09,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:07:09,334 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:07:09,383 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:07:09,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:09,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 285 proven. 126 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-23 10:07:09,726 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 285 proven. 126 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-23 10:07:10,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:10,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-10-23 10:07:10,012 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:10,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 10:07:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 10:07:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:10,013 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 23 states. [2018-10-23 10:07:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:10,163 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-10-23 10:07:10,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 10:07:10,164 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2018-10-23 10:07:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:10,165 INFO L225 Difference]: With dead ends: 126 [2018-10-23 10:07:10,165 INFO L226 Difference]: Without dead ends: 86 [2018-10-23 10:07:10,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-23 10:07:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-23 10:07:10,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2018-10-23 10:07:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-23 10:07:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-23 10:07:10,178 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2018-10-23 10:07:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:10,178 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-23 10:07:10,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 10:07:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-23 10:07:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-23 10:07:10,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:10,180 INFO L375 BasicCegarLoop]: trace histogram [22, 20, 20, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:10,180 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:10,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 744367058, now seen corresponding path program 10 times [2018-10-23 10:07:10,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:10,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:10,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:10,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:10,182 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-10-23 10:07:10,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:10,308 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:10,309 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:10,309 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:10,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:10,309 INFO L194 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 [2018-10-23 10:07:10,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:10,318 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:07:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:10,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-10-23 10:07:10,622 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-10-23 10:07:10,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:10,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-10-23 10:07:10,784 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:10,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 10:07:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 10:07:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-23 10:07:10,785 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 9 states. [2018-10-23 10:07:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:10,827 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-23 10:07:10,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 10:07:10,827 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2018-10-23 10:07:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:10,828 INFO L225 Difference]: With dead ends: 157 [2018-10-23 10:07:10,828 INFO L226 Difference]: Without dead ends: 152 [2018-10-23 10:07:10,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-23 10:07:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-23 10:07:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2018-10-23 10:07:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-23 10:07:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2018-10-23 10:07:10,842 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 83 [2018-10-23 10:07:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:10,842 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2018-10-23 10:07:10,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 10:07:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2018-10-23 10:07:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-23 10:07:10,844 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:10,845 INFO L375 BasicCegarLoop]: trace histogram [33, 30, 30, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:10,845 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:10,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:10,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2030161270, now seen corresponding path program 11 times [2018-10-23 10:07:10,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:10,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:10,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:10,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:10,846 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2018-10-23 10:07:11,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:11,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:11,006 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:11,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:11,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:11,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:11,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:11,015 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:11,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:11,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:11,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2018-10-23 10:07:11,357 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1041 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2018-10-23 10:07:11,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:11,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-10-23 10:07:11,451 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:11,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 10:07:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 10:07:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:07:11,452 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 11 states. [2018-10-23 10:07:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:11,493 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2018-10-23 10:07:11,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 10:07:11,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2018-10-23 10:07:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:11,496 INFO L225 Difference]: With dead ends: 192 [2018-10-23 10:07:11,496 INFO L226 Difference]: Without dead ends: 187 [2018-10-23 10:07:11,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:07:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-23 10:07:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2018-10-23 10:07:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-23 10:07:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2018-10-23 10:07:11,512 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 118 [2018-10-23 10:07:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:11,513 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2018-10-23 10:07:11,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 10:07:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2018-10-23 10:07:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-23 10:07:11,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:11,518 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 40, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:11,519 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:11,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -969563822, now seen corresponding path program 12 times [2018-10-23 10:07:11,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:11,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:11,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:11,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:11,520 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-23 10:07:11,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:11,758 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:11,758 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:11,758 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:11,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:11,758 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_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 -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 [2018-10-23 10:07:11,766 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:07:11,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:07:11,835 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:07:11,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:11,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-23 10:07:11,977 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-23 10:07:12,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:12,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2018-10-23 10:07:12,103 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:12,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 10:07:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 10:07:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-23 10:07:12,104 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 13 states. [2018-10-23 10:07:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:12,192 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-23 10:07:12,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 10:07:12,193 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2018-10-23 10:07:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:12,195 INFO L225 Difference]: With dead ends: 227 [2018-10-23 10:07:12,195 INFO L226 Difference]: Without dead ends: 222 [2018-10-23 10:07:12,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-23 10:07:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-23 10:07:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2018-10-23 10:07:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-23 10:07:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2018-10-23 10:07:12,217 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 153 [2018-10-23 10:07:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:12,218 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2018-10-23 10:07:12,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 10:07:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2018-10-23 10:07:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-23 10:07:12,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:12,221 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:12,222 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:12,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:12,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1779605514, now seen corresponding path program 13 times [2018-10-23 10:07:12,222 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:12,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:12,223 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-23 10:07:13,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:13,261 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:13,261 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:13,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:13,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:13,262 INFO L194 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) [2018-10-23 10:07:13,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:13,279 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:07:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:13,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-23 10:07:13,758 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-23 10:07:13,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:13,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2018-10-23 10:07:13,916 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:13,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 10:07:13,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 10:07:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-23 10:07:13,917 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2018-10-23 10:07:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:14,113 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2018-10-23 10:07:14,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 10:07:14,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 188 [2018-10-23 10:07:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:14,116 INFO L225 Difference]: With dead ends: 262 [2018-10-23 10:07:14,117 INFO L226 Difference]: Without dead ends: 257 [2018-10-23 10:07:14,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 364 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-23 10:07:14,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-23 10:07:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 224. [2018-10-23 10:07:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-23 10:07:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 230 transitions. [2018-10-23 10:07:14,141 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 230 transitions. Word has length 188 [2018-10-23 10:07:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 230 transitions. [2018-10-23 10:07:14,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 10:07:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 230 transitions. [2018-10-23 10:07:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-23 10:07:14,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:14,146 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 60, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:14,146 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:14,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 388824786, now seen corresponding path program 14 times [2018-10-23 10:07:14,147 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:14,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:14,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:14,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:14,148 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-23 10:07:14,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:14,496 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:14,496 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:14,497 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:14,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:14,497 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:14,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:14,504 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:14,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:14,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:14,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-23 10:07:14,821 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-23 10:07:15,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:15,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2018-10-23 10:07:15,018 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:15,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 10:07:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 10:07:15,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-23 10:07:15,019 INFO L87 Difference]: Start difference. First operand 224 states and 230 transitions. Second operand 17 states. [2018-10-23 10:07:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:15,234 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2018-10-23 10:07:15,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 10:07:15,235 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 223 [2018-10-23 10:07:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:15,237 INFO L225 Difference]: With dead ends: 297 [2018-10-23 10:07:15,237 INFO L226 Difference]: Without dead ends: 292 [2018-10-23 10:07:15,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 432 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-23 10:07:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-23 10:07:15,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 259. [2018-10-23 10:07:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-23 10:07:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 266 transitions. [2018-10-23 10:07:15,264 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 266 transitions. Word has length 223 [2018-10-23 10:07:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:15,265 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 266 transitions. [2018-10-23 10:07:15,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 10:07:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 266 transitions. [2018-10-23 10:07:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-23 10:07:15,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:15,267 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 70, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:15,267 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:15,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:15,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1062399370, now seen corresponding path program 15 times [2018-10-23 10:07:15,268 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:15,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:15,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:15,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:15,269 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-23 10:07:15,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:15,718 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:15,718 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:15,718 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:15,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:15,719 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:15,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:07:15,726 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:07:15,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:07:15,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:15,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-23 10:07:16,282 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-23 10:07:16,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:16,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2018-10-23 10:07:16,543 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:16,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 10:07:16,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 10:07:16,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-23 10:07:16,544 INFO L87 Difference]: Start difference. First operand 259 states and 266 transitions. Second operand 19 states. [2018-10-23 10:07:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:16,712 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2018-10-23 10:07:16,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 10:07:16,713 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2018-10-23 10:07:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:16,715 INFO L225 Difference]: With dead ends: 332 [2018-10-23 10:07:16,715 INFO L226 Difference]: Without dead ends: 327 [2018-10-23 10:07:16,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 500 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-23 10:07:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-23 10:07:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 294. [2018-10-23 10:07:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-23 10:07:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2018-10-23 10:07:16,746 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 258 [2018-10-23 10:07:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:16,747 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2018-10-23 10:07:16,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 10:07:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2018-10-23 10:07:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-23 10:07:16,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:16,749 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 80, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:16,749 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:16,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash -790873006, now seen corresponding path program 16 times [2018-10-23 10:07:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:16,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:16,750 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-23 10:07:17,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:17,170 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:17,171 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:17,171 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:17,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:17,171 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:17,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:17,179 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:07:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:17,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-23 10:07:17,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-23 10:07:17,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:17,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2018-10-23 10:07:17,938 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:17,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 10:07:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 10:07:17,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:17,940 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2018-10-23 10:07:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:18,080 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2018-10-23 10:07:18,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 10:07:18,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 293 [2018-10-23 10:07:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:18,082 INFO L225 Difference]: With dead ends: 367 [2018-10-23 10:07:18,082 INFO L226 Difference]: Without dead ends: 362 [2018-10-23 10:07:18,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 568 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-23 10:07:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 329. [2018-10-23 10:07:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-23 10:07:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 338 transitions. [2018-10-23 10:07:18,117 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 338 transitions. Word has length 293 [2018-10-23 10:07:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:18,118 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 338 transitions. [2018-10-23 10:07:18,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 10:07:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 338 transitions. [2018-10-23 10:07:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-23 10:07:18,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:18,120 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 90, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:18,120 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:18,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash 547939574, now seen corresponding path program 17 times [2018-10-23 10:07:18,121 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:18,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:18,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:07:18,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:18,122 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-23 10:07:18,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:18,859 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:07:18,859 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:07:18,859 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:07:18,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:07:18,860 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-23 10:07:18,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:07:18,868 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:07:18,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:07:18,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:07:18,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:07:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-23 10:07:19,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:07:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-23 10:07:19,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:07:19,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2018-10-23 10:07:19,509 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:07:19,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 10:07:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 10:07:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-23 10:07:19,510 INFO L87 Difference]: Start difference. First operand 329 states and 338 transitions. Second operand 23 states. [2018-10-23 10:07:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:19,667 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2018-10-23 10:07:19,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 10:07:19,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 328 [2018-10-23 10:07:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:19,670 INFO L225 Difference]: With dead ends: 402 [2018-10-23 10:07:19,670 INFO L226 Difference]: Without dead ends: 397 [2018-10-23 10:07:19,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 636 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-23 10:07:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-10-23 10:07:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 364. [2018-10-23 10:07:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-23 10:07:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 374 transitions. [2018-10-23 10:07:19,711 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 374 transitions. Word has length 328 [2018-10-23 10:07:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:19,712 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 374 transitions. [2018-10-23 10:07:19,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 10:07:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 374 transitions. [2018-10-23 10:07:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-23 10:07:19,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:07:19,715 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 100, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:07:19,715 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:07:19,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:07:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1390107090, now seen corresponding path program 18 times [2018-10-23 10:07:19,715 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:07:19,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:19,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:07:19,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:07:19,716 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:07:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:07:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17095 backedges. 17077 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 10:07:26,810 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:07:26,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-10-23 10:07:26,811 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:07:26,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-23 10:07:26,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-23 10:07:26,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-10-23 10:07:26,815 INFO L87 Difference]: Start difference. First operand 364 states and 374 transitions. Second operand 105 states. [2018-10-23 10:07:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:07:30,773 INFO L93 Difference]: Finished difference Result 14899 states and 15359 transitions. [2018-10-23 10:07:30,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-23 10:07:30,773 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 363 [2018-10-23 10:07:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:07:30,774 INFO L225 Difference]: With dead ends: 14899 [2018-10-23 10:07:30,774 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 10:07:30,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-10-23 10:07:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 10:07:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 10:07:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 10:07:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 10:07:30,802 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 363 [2018-10-23 10:07:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:07:30,802 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 10:07:30,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-23 10:07:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 10:07:30,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 10:07:30,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 10:07:32,848 WARN L179 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-23 10:07:39,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,139 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,213 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,254 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,299 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,448 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:39,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,085 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,412 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,670 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:40,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,257 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,366 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,392 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,456 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,531 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,661 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:41,712 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,017 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,047 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,097 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,429 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:42,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,424 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,831 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:43,944 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:44,223 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:44,486 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:44,601 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:45,478 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:45,497 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:45,574 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,473 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,652 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,756 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:46,985 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,088 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,568 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:47,959 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:48,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:48,345 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:48,984 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:49,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,077 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,231 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,258 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,480 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,836 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:50,968 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:51,272 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:51,411 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:52,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:52,611 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:53,229 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:53,465 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:53,550 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:53,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:54,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:55,381 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:55,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:55,501 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:55,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:55,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,575 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,825 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:56,997 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:57,809 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,081 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,619 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,967 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:58,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:07:59,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:00,028 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:00,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:00,237 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:00,517 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:01,114 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:01,203 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:02,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:02,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:03,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:04,744 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:05,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:06,072 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:06,516 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:06,776 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:07,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:07,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:07,829 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:07,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:08,053 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:08,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:08,358 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:10,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:10,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:10,251 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:10,338 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:12,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:12,785 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:13,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:13,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:13,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:13,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:14,100 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:14,422 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:14,661 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:14,741 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:15,611 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:15,952 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:16,883 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:16,904 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:17,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:18,021 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:19,583 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:19,627 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:20,062 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:20,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:21,832 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:22,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:22,308 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:23,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:23,437 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:23,514 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:23,652 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:23,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:24,155 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:24,758 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:25,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:25,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:29,044 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:29,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:29,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:29,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:30,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:32,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:34,045 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:36,371 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:39,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:43,693 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:50,849 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:52,648 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:53,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:53,600 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:56,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:57,222 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:08:59,302 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:09:03,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:09:12,305 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-23 10:09:21,033 WARN L179 SmtUtils]: Spent 1.80 m on a formula simplification. DAG size of input: 5173 DAG size of output: 2371 [2018-10-23 10:09:28,105 WARN L179 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 Received shutdown request... [2018-10-23 10:10:58,573 WARN L187 SmtUtils]: Removed 256 from assertion stack [2018-10-23 10:10:58,574 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-23 10:10:58,576 INFO L168 Benchmark]: Toolchain (without parser) took 239393.14 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.1 GB). Free memory was 1.4 GB in the beginning and 2.9 GB in the end (delta: -1.5 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-10-23 10:10:58,577 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:10:58,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 10:10:58,578 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:10:58,578 INFO L168 Benchmark]: Boogie Preprocessor took 25.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:10:58,579 INFO L168 Benchmark]: RCFGBuilder took 565.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-23 10:10:58,580 INFO L168 Benchmark]: TraceAbstraction took 238494.82 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: -671.8 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-10-23 10:10:58,588 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.82 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 25.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.72 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 565.38 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 757.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -809.7 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238494.82 ms. Allocated memory was 2.3 GB in the beginning and 3.6 GB in the end (delta: 1.3 GB). Free memory was 2.2 GB in the beginning and 2.9 GB in the end (delta: -671.8 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 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 - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 2349. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown