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-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 10:22:19,428 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 10:22:19,430 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 10:22:19,448 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 10:22:19,448 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 10:22:19,449 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 10:22:19,451 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 10:22:19,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 10:22:19,454 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 10:22:19,455 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 10:22:19,456 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 10:22:19,456 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 10:22:19,457 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 10:22:19,458 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 10:22:19,459 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 10:22:19,461 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 10:22:19,462 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 10:22:19,465 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 10:22:19,467 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 10:22:19,468 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 10:22:19,469 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 10:22:19,471 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 10:22:19,473 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-27 10:22:19,482 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 10:22:19,505 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 10:22:19,506 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 10:22:19,506 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 10:22:19,507 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 10:22:19,507 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 10:22:19,507 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 10:22:19,507 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 10:22:19,507 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 10:22:19,508 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 10:22:19,508 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 10:22:19,509 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 10:22:19,509 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 10:22:19,509 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 10:22:19,510 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 10:22:19,510 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 10:22:19,510 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 10:22:19,510 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 10:22:19,510 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 10:22:19,511 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 10:22:19,512 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 10:22:19,513 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 10:22:19,513 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 10:22:19,513 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 10:22:19,513 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 10:22:19,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 10:22:19,514 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 10:22:19,514 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 10:22:19,514 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 10:22:19,514 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 10:22:19,515 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 10:22:19,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 10:22:19,515 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 10:22:19,515 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 10:22:19,515 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 10:22:19,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 10:22:19,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 10:22:19,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 10:22:19,583 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 10:22:19,584 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 10:22:19,585 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c [2018-10-27 10:22:19,644 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a93198aba/2e14f062e1204a5f9eab8ce273ccd295/FLAGdc7b01905 [2018-10-27 10:22:20,281 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 10:22:20,282 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label45_false-unreach-call.c [2018-10-27 10:22:20,300 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a93198aba/2e14f062e1204a5f9eab8ce273ccd295/FLAGdc7b01905 [2018-10-27 10:22:20,316 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a93198aba/2e14f062e1204a5f9eab8ce273ccd295 [2018-10-27 10:22:20,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 10:22:20,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 10:22:20,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 10:22:20,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 10:22:20,337 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 10:22:20,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:22:20" (1/1) ... [2018-10-27 10:22:20,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed858fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:20, skipping insertion in model container [2018-10-27 10:22:20,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 10:22:20" (1/1) ... [2018-10-27 10:22:20,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 10:22:20,433 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 10:22:21,111 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 10:22:21,117 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 10:22:21,458 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 10:22:21,484 INFO L193 MainTranslator]: Completed translation [2018-10-27 10:22:21,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21 WrapperNode [2018-10-27 10:22:21,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 10:22:21,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 10:22:21,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 10:22:21,486 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 10:22:21,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 10:22:21,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 10:22:21,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 10:22:21,783 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 10:22:21,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (1/1) ... [2018-10-27 10:22:21,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 10:22:21,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 10:22:21,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 10:22:21,917 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 10:22:21,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (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 [2018-10-27 10:22:21,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 10:22:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 10:22:21,988 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 10:22:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 10:22:21,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 10:22:21,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 10:22:21,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 10:22:21,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 10:22:27,132 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 10:22:27,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:22:27 BoogieIcfgContainer [2018-10-27 10:22:27,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 10:22:27,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 10:22:27,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 10:22:27,138 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 10:22:27,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 10:22:20" (1/3) ... [2018-10-27 10:22:27,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4fbea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:22:27, skipping insertion in model container [2018-10-27 10:22:27,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 10:22:21" (2/3) ... [2018-10-27 10:22:27,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4fbea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 10:22:27, skipping insertion in model container [2018-10-27 10:22:27,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 10:22:27" (3/3) ... [2018-10-27 10:22:27,146 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label45_false-unreach-call.c [2018-10-27 10:22:27,157 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 10:22:27,173 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 10:22:27,193 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 10:22:27,254 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 10:22:27,254 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 10:22:27,254 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 10:22:27,254 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 10:22:27,254 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 10:22:27,255 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 10:22:27,255 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 10:22:27,255 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 10:22:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states. [2018-10-27 10:22:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-27 10:22:27,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:27,330 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:27,333 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:27,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -554051460, now seen corresponding path program 1 times [2018-10-27 10:22:27,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:27,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:27,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:27,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:27,408 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:28,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 10:22:28,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 10:22:28,610 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:28,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 10:22:28,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 10:22:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 10:22:28,638 INFO L87 Difference]: Start difference. First operand 312 states. Second operand 4 states. [2018-10-27 10:22:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:31,973 INFO L93 Difference]: Finished difference Result 1082 states and 1941 transitions. [2018-10-27 10:22:31,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 10:22:31,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2018-10-27 10:22:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:32,003 INFO L225 Difference]: With dead ends: 1082 [2018-10-27 10:22:32,004 INFO L226 Difference]: Without dead ends: 764 [2018-10-27 10:22:32,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 10:22:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-10-27 10:22:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 522. [2018-10-27 10:22:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-10-27 10:22:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 918 transitions. [2018-10-27 10:22:32,115 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 918 transitions. Word has length 151 [2018-10-27 10:22:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:32,116 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 918 transitions. [2018-10-27 10:22:32,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 10:22:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 918 transitions. [2018-10-27 10:22:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-27 10:22:32,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:32,124 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:32,124 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:32,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash 406455853, now seen corresponding path program 1 times [2018-10-27 10:22:32,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:32,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:32,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:32,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:32,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:32,471 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 10:22:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:22:32,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 10:22:32,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 10:22:32,712 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:32,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 10:22:32,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 10:22:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 10:22:32,714 INFO L87 Difference]: Start difference. First operand 522 states and 918 transitions. Second operand 5 states. [2018-10-27 10:22:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:22:36,249 INFO L93 Difference]: Finished difference Result 1609 states and 2931 transitions. [2018-10-27 10:22:36,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 10:22:36,251 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2018-10-27 10:22:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:22:36,263 INFO L225 Difference]: With dead ends: 1609 [2018-10-27 10:22:36,263 INFO L226 Difference]: Without dead ends: 1093 [2018-10-27 10:22:36,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:22:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2018-10-27 10:22:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1070. [2018-10-27 10:22:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2018-10-27 10:22:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1765 transitions. [2018-10-27 10:22:36,360 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1765 transitions. Word has length 162 [2018-10-27 10:22:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:22:36,361 INFO L481 AbstractCegarLoop]: Abstraction has 1070 states and 1765 transitions. [2018-10-27 10:22:36,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 10:22:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1765 transitions. [2018-10-27 10:22:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-27 10:22:36,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:22:36,371 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:22:36,372 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:22:36,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash 2048888082, now seen corresponding path program 1 times [2018-10-27 10:22:36,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:22:36,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:36,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:22:36,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:22:36,374 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:22:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:22:36,654 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 4 [2018-10-27 10:22:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 10:22:37,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:22:37,030 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:22:37,031 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 173 with the following transitions: [2018-10-27 10:22:37,033 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:22:37,102 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:22:37,103 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:22:38,263 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:22:38,265 INFO L272 AbstractInterpreter]: Visited 152 different actions 152 times. Never merged. Never widened. Never found a fixpoint. Largest state had 88 variables. [2018-10-27 10:22:38,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:22:38,308 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:22:39,504 INFO L227 lantSequenceWeakener]: Weakened 161 states. On average, predicates are now at 69.84% of their original sizes. [2018-10-27 10:22:39,504 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:22:42,227 INFO L415 sIntCurrentIteration]: We unified 171 AI predicates to 171 [2018-10-27 10:22:42,227 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:22:42,228 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:22:42,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [6] total 29 [2018-10-27 10:22:42,229 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:22:42,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-27 10:22:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-27 10:22:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2018-10-27 10:22:42,231 INFO L87 Difference]: Start difference. First operand 1070 states and 1765 transitions. Second operand 25 states. [2018-10-27 10:23:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:23:21,500 INFO L93 Difference]: Finished difference Result 2344 states and 3852 transitions. [2018-10-27 10:23:21,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 10:23:21,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 172 [2018-10-27 10:23:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:23:21,508 INFO L225 Difference]: With dead ends: 2344 [2018-10-27 10:23:21,509 INFO L226 Difference]: Without dead ends: 1280 [2018-10-27 10:23:21,512 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2018-10-27 10:23:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2018-10-27 10:23:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1278. [2018-10-27 10:23:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2018-10-27 10:23:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1982 transitions. [2018-10-27 10:23:21,551 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1982 transitions. Word has length 172 [2018-10-27 10:23:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:23:21,552 INFO L481 AbstractCegarLoop]: Abstraction has 1278 states and 1982 transitions. [2018-10-27 10:23:21,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-27 10:23:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1982 transitions. [2018-10-27 10:23:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-27 10:23:21,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:23:21,557 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:23:21,557 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:23:21,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:23:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash -632109419, now seen corresponding path program 1 times [2018-10-27 10:23:21,558 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:23:21,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:23:21,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:23:21,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:23:21,560 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:23:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:23:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 10:23:21,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:23:21,987 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:23:21,987 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 185 with the following transitions: [2018-10-27 10:23:21,988 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:23:21,996 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:23:21,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:23:23,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:23:23,507 INFO L272 AbstractInterpreter]: Visited 156 different actions 306 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:23:23,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:23:23,547 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:23:24,961 INFO L227 lantSequenceWeakener]: Weakened 78 states. On average, predicates are now at 70.18% of their original sizes. [2018-10-27 10:23:24,961 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:23:28,848 INFO L415 sIntCurrentIteration]: We unified 183 AI predicates to 183 [2018-10-27 10:23:28,849 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:23:28,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:23:28,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [40] imperfect sequences [9] total 47 [2018-10-27 10:23:28,849 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:23:28,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-27 10:23:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-27 10:23:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1287, Unknown=0, NotChecked=0, Total=1560 [2018-10-27 10:23:28,851 INFO L87 Difference]: Start difference. First operand 1278 states and 1982 transitions. Second operand 40 states. [2018-10-27 10:24:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:07,519 INFO L93 Difference]: Finished difference Result 2556 states and 4073 transitions. [2018-10-27 10:24:07,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 10:24:07,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 184 [2018-10-27 10:24:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:07,526 INFO L225 Difference]: With dead ends: 2556 [2018-10-27 10:24:07,526 INFO L226 Difference]: Without dead ends: 1492 [2018-10-27 10:24:07,531 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 196 GetRequests, 133 SyntacticMatches, 12 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2018-10-27 10:24:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2018-10-27 10:24:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1489. [2018-10-27 10:24:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1489 states. [2018-10-27 10:24:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2207 transitions. [2018-10-27 10:24:07,569 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2207 transitions. Word has length 184 [2018-10-27 10:24:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:07,569 INFO L481 AbstractCegarLoop]: Abstraction has 1489 states and 2207 transitions. [2018-10-27 10:24:07,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-27 10:24:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2207 transitions. [2018-10-27 10:24:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-27 10:24:07,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:07,574 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:07,575 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:07,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1268916922, now seen corresponding path program 1 times [2018-10-27 10:24:07,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:07,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:07,577 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:24:07,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:07,883 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:07,883 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 185 with the following transitions: [2018-10-27 10:24:07,883 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:07,893 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:07,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:09,254 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 10:24:09,254 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 88 variables. [2018-10-27 10:24:09,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:09,262 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 10:24:09,939 INFO L227 lantSequenceWeakener]: Weakened 179 states. On average, predicates are now at 69.73% of their original sizes. [2018-10-27 10:24:09,939 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 10:24:10,738 INFO L415 sIntCurrentIteration]: We unified 183 AI predicates to 183 [2018-10-27 10:24:10,738 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 10:24:10,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:24:10,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [5] total 26 [2018-10-27 10:24:10,739 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:24:10,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-27 10:24:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-27 10:24:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2018-10-27 10:24:10,741 INFO L87 Difference]: Start difference. First operand 1489 states and 2207 transitions. Second operand 23 states. [2018-10-27 10:24:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:53,185 INFO L93 Difference]: Finished difference Result 3949 states and 6473 transitions. [2018-10-27 10:24:53,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-27 10:24:53,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 184 [2018-10-27 10:24:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:53,199 INFO L225 Difference]: With dead ends: 3949 [2018-10-27 10:24:53,199 INFO L226 Difference]: Without dead ends: 2885 [2018-10-27 10:24:53,205 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2018-10-27 10:24:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2018-10-27 10:24:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2875. [2018-10-27 10:24:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2875 states. [2018-10-27 10:24:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 3856 transitions. [2018-10-27 10:24:53,280 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 3856 transitions. Word has length 184 [2018-10-27 10:24:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:53,281 INFO L481 AbstractCegarLoop]: Abstraction has 2875 states and 3856 transitions. [2018-10-27 10:24:53,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-27 10:24:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 3856 transitions. [2018-10-27 10:24:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-27 10:24:53,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:53,289 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:53,289 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:53,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1419749212, now seen corresponding path program 1 times [2018-10-27 10:24:53,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:53,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:53,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:53,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:53,296 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:53,588 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 10:24:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 52 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-10-27 10:24:53,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:53,642 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:53,642 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2018-10-27 10:24:53,643 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [10], [12], [13], [16], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:53,649 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:53,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:55,366 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:55,366 INFO L272 AbstractInterpreter]: Visited 158 different actions 470 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 10:24:55,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:55,378 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:55,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:55,378 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 [2018-10-27 10:24:55,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:55,387 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:55,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-27 10:24:55,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:24:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-27 10:24:56,079 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 10:24:56,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [9] total 11 [2018-10-27 10:24:56,079 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 10:24:56,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 10:24:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 10:24:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-10-27 10:24:56,081 INFO L87 Difference]: Start difference. First operand 2875 states and 3856 transitions. Second operand 3 states. [2018-10-27 10:24:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:24:56,807 INFO L93 Difference]: Finished difference Result 4905 states and 6823 transitions. [2018-10-27 10:24:56,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 10:24:56,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2018-10-27 10:24:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:24:56,821 INFO L225 Difference]: With dead ends: 4905 [2018-10-27 10:24:56,822 INFO L226 Difference]: Without dead ends: 2874 [2018-10-27 10:24:56,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-10-27 10:24:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2018-10-27 10:24:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2874. [2018-10-27 10:24:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2874 states. [2018-10-27 10:24:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 3854 transitions. [2018-10-27 10:24:57,166 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 3854 transitions. Word has length 206 [2018-10-27 10:24:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:24:57,167 INFO L481 AbstractCegarLoop]: Abstraction has 2874 states and 3854 transitions. [2018-10-27 10:24:57,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 10:24:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 3854 transitions. [2018-10-27 10:24:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-27 10:24:57,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:24:57,175 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:24:57,176 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:24:57,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1501198144, now seen corresponding path program 1 times [2018-10-27 10:24:57,176 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:24:57,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:57,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:57,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:24:57,177 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:24:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:57,440 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 10:24:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 71 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-27 10:24:57,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:57,684 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:24:57,685 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 224 with the following transitions: [2018-10-27 10:24:57,685 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [64], [65], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:24:57,690 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:24:57,690 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:24:59,542 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:24:59,542 INFO L272 AbstractInterpreter]: Visited 158 different actions 470 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 88 variables. [2018-10-27 10:24:59,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:24:59,544 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:24:59,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:24:59,544 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 [2018-10-27 10:24:59,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:24:59,552 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:24:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:24:59,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:24:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2018-10-27 10:24:59,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 18 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-10-27 10:25:00,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:00,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 10:25:00,666 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:00,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 10:25:00,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 10:25:00,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-27 10:25:00,668 INFO L87 Difference]: Start difference. First operand 2874 states and 3854 transitions. Second operand 12 states. [2018-10-27 10:25:01,536 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-27 10:25:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:08,418 INFO L93 Difference]: Finished difference Result 11124 states and 17442 transitions. [2018-10-27 10:25:08,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-27 10:25:08,421 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 223 [2018-10-27 10:25:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:08,467 INFO L225 Difference]: With dead ends: 11124 [2018-10-27 10:25:08,467 INFO L226 Difference]: Without dead ends: 8256 [2018-10-27 10:25:08,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 468 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2018-10-27 10:25:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2018-10-27 10:25:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 8207. [2018-10-27 10:25:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8207 states. [2018-10-27 10:25:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 11643 transitions. [2018-10-27 10:25:08,772 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 11643 transitions. Word has length 223 [2018-10-27 10:25:08,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:08,773 INFO L481 AbstractCegarLoop]: Abstraction has 8207 states and 11643 transitions. [2018-10-27 10:25:08,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 10:25:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 11643 transitions. [2018-10-27 10:25:08,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-27 10:25:08,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:08,805 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:08,805 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:08,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2032301325, now seen corresponding path program 1 times [2018-10-27 10:25:08,806 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:08,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:08,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:08,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:08,807 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:25:09,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:09,529 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:09,529 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 281 with the following transitions: [2018-10-27 10:25:09,530 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:09,534 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:09,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:12,490 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:12,490 INFO L272 AbstractInterpreter]: Visited 156 different actions 465 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 10:25:12,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:12,497 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:12,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:12,497 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 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 [2018-10-27 10:25:12,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:12,506 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:12,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:25:12,956 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 10:25:13,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:13,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-10-27 10:25:13,249 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:13,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 10:25:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 10:25:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-27 10:25:13,250 INFO L87 Difference]: Start difference. First operand 8207 states and 11643 transitions. Second operand 7 states. [2018-10-27 10:25:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:17,230 INFO L93 Difference]: Finished difference Result 27343 states and 46227 transitions. [2018-10-27 10:25:17,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 10:25:17,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2018-10-27 10:25:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:17,412 INFO L225 Difference]: With dead ends: 27343 [2018-10-27 10:25:17,412 INFO L226 Difference]: Without dead ends: 19561 [2018-10-27 10:25:17,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 559 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-27 10:25:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19561 states. [2018-10-27 10:25:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19561 to 18980. [2018-10-27 10:25:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18980 states. [2018-10-27 10:25:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18980 states to 18980 states and 27732 transitions. [2018-10-27 10:25:18,512 INFO L78 Accepts]: Start accepts. Automaton has 18980 states and 27732 transitions. Word has length 280 [2018-10-27 10:25:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:18,512 INFO L481 AbstractCegarLoop]: Abstraction has 18980 states and 27732 transitions. [2018-10-27 10:25:18,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 10:25:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 18980 states and 27732 transitions. [2018-10-27 10:25:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-10-27 10:25:18,583 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:18,583 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:18,584 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:18,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash 840377361, now seen corresponding path program 1 times [2018-10-27 10:25:18,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:18,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:18,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:18,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:18,586 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 169 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 10:25:19,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:19,245 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:19,246 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-10-27 10:25:19,246 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:19,251 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:19,251 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:22,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:22,054 INFO L272 AbstractInterpreter]: Visited 157 different actions 468 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 10:25:22,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:22,062 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:22,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:22,062 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 [2018-10-27 10:25:22,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:22,071 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:22,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 10:25:22,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 169 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-10-27 10:25:23,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:23,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 10:25:23,503 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:23,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 10:25:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 10:25:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-10-27 10:25:23,504 INFO L87 Difference]: Start difference. First operand 18980 states and 27732 transitions. Second operand 9 states. [2018-10-27 10:25:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:27,920 INFO L93 Difference]: Finished difference Result 45938 states and 75993 transitions. [2018-10-27 10:25:27,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 10:25:27,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 305 [2018-10-27 10:25:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:28,158 INFO L225 Difference]: With dead ends: 45938 [2018-10-27 10:25:28,158 INFO L226 Difference]: Without dead ends: 27383 [2018-10-27 10:25:28,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 610 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2018-10-27 10:25:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27383 states. [2018-10-27 10:25:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27383 to 26585. [2018-10-27 10:25:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26585 states. [2018-10-27 10:25:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26585 states to 26585 states and 42508 transitions. [2018-10-27 10:25:29,491 INFO L78 Accepts]: Start accepts. Automaton has 26585 states and 42508 transitions. Word has length 305 [2018-10-27 10:25:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:29,492 INFO L481 AbstractCegarLoop]: Abstraction has 26585 states and 42508 transitions. [2018-10-27 10:25:29,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 10:25:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26585 states and 42508 transitions. [2018-10-27 10:25:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2018-10-27 10:25:29,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:29,588 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:29,589 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:29,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1309429795, now seen corresponding path program 1 times [2018-10-27 10:25:29,589 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:29,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:29,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:29,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:29,590 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 163 proven. 14 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-27 10:25:30,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:30,166 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:30,166 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 312 with the following transitions: [2018-10-27 10:25:30,167 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [8], [12], [13], [17], [21], [25], [29], [33], [37], [41], [45], [49], [53], [56], [57], [61], [65], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:30,171 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:30,172 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:33,528 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:33,528 INFO L272 AbstractInterpreter]: Visited 160 different actions 632 times. Merged at 9 different actions 32 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 10:25:33,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:33,537 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:33,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:33,537 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 [2018-10-27 10:25:33,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:33,545 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:33,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-27 10:25:33,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 207 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-27 10:25:33,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:33,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-10-27 10:25:33,984 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:33,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 10:25:33,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 10:25:33,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-27 10:25:33,986 INFO L87 Difference]: Start difference. First operand 26585 states and 42508 transitions. Second operand 8 states. [2018-10-27 10:25:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:42,682 INFO L93 Difference]: Finished difference Result 79951 states and 148992 transitions. [2018-10-27 10:25:42,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-27 10:25:42,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 311 [2018-10-27 10:25:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:43,226 INFO L225 Difference]: With dead ends: 79951 [2018-10-27 10:25:43,226 INFO L226 Difference]: Without dead ends: 49351 [2018-10-27 10:25:43,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 657 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=1888, Unknown=0, NotChecked=0, Total=2256 [2018-10-27 10:25:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49351 states. [2018-10-27 10:25:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49351 to 43518. [2018-10-27 10:25:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43518 states. [2018-10-27 10:25:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43518 states to 43518 states and 61688 transitions. [2018-10-27 10:25:46,075 INFO L78 Accepts]: Start accepts. Automaton has 43518 states and 61688 transitions. Word has length 311 [2018-10-27 10:25:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:46,075 INFO L481 AbstractCegarLoop]: Abstraction has 43518 states and 61688 transitions. [2018-10-27 10:25:46,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 10:25:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 43518 states and 61688 transitions. [2018-10-27 10:25:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-27 10:25:46,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:46,154 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:46,154 INFO L424 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:46,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash 853398159, now seen corresponding path program 1 times [2018-10-27 10:25:46,155 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:46,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:46,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:46,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:46,156 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 196 proven. 39 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-10-27 10:25:46,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:46,780 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:46,780 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-10-27 10:25:46,781 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [16], [17], [21], [25], [29], [33], [37], [41], [45], [48], [49], [53], [57], [61], [65], [68], [73], [75], [76], [80], [84], [88], [92], [95], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [436], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:46,786 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:46,786 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:48,973 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:48,974 INFO L272 AbstractInterpreter]: Visited 159 different actions 474 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 88 variables. [2018-10-27 10:25:48,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:48,982 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:48,982 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:48,982 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 [2018-10-27 10:25:48,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:48,990 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:49,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 227 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2018-10-27 10:25:49,842 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 191 proven. 77 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-27 10:25:50,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:25:50,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-10-27 10:25:50,088 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:25:50,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 10:25:50,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 10:25:50,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-27 10:25:50,089 INFO L87 Difference]: Start difference. First operand 43518 states and 61688 transitions. Second operand 9 states. [2018-10-27 10:25:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 10:25:53,257 INFO L93 Difference]: Finished difference Result 102497 states and 153516 transitions. [2018-10-27 10:25:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-27 10:25:53,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2018-10-27 10:25:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 10:25:53,649 INFO L225 Difference]: With dead ends: 102497 [2018-10-27 10:25:53,649 INFO L226 Difference]: Without dead ends: 63664 [2018-10-27 10:25:53,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 661 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-27 10:25:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63664 states. [2018-10-27 10:25:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63664 to 61702. [2018-10-27 10:25:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61702 states. [2018-10-27 10:25:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61702 states to 61702 states and 81631 transitions. [2018-10-27 10:25:56,054 INFO L78 Accepts]: Start accepts. Automaton has 61702 states and 81631 transitions. Word has length 333 [2018-10-27 10:25:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 10:25:56,055 INFO L481 AbstractCegarLoop]: Abstraction has 61702 states and 81631 transitions. [2018-10-27 10:25:56,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 10:25:56,055 INFO L276 IsEmpty]: Start isEmpty. Operand 61702 states and 81631 transitions. [2018-10-27 10:25:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-27 10:25:56,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 10:25:56,104 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 10:25:56,105 INFO L424 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 10:25:56,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash -547898242, now seen corresponding path program 1 times [2018-10-27 10:25:56,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 10:25:56,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:56,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:56,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 10:25:56,107 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 10:25:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 10:25:57,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:57,366 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 10:25:57,366 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-10-27 10:25:57,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [24], [25], [29], [33], [37], [41], [45], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [127], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [600], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [669], [671], [1157], [1161], [1165], [1171], [1175], [1177], [1182], [1183], [1184], [1186], [1187] [2018-10-27 10:25:57,371 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 10:25:57,371 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 10:25:59,343 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 10:25:59,344 INFO L272 AbstractInterpreter]: Visited 157 different actions 470 times. Merged at 7 different actions 23 times. Never widened. Found 4 fixpoints after 4 different actions. Largest state had 88 variables. [2018-10-27 10:25:59,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 10:25:59,351 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 10:25:59,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 10:25:59,351 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 [2018-10-27 10:25:59,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 10:25:59,360 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 10:25:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 10:25:59,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 10:25:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 10:25:59,652 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 10:25:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 10:26:00,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 10:26:00,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2018-10-27 10:26:00,021 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 10:26:00,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 10:26:00,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 10:26:00,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 10:26:00,022 INFO L87 Difference]: Start difference. First operand 61702 states and 81631 transitions. Second operand 6 states. Received shutdown request... [2018-10-27 10:26:01,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 10:26:01,566 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 10:26:01,572 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 10:26:01,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 10:26:01 BoogieIcfgContainer [2018-10-27 10:26:01,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 10:26:01,574 INFO L168 Benchmark]: Toolchain (without parser) took 221244.35 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 924.3 MB in the end (delta: 460.2 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,575 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-27 10:26:01,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1153.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 295.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -858.1 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,577 INFO L168 Benchmark]: Boogie Preprocessor took 134.27 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,578 INFO L168 Benchmark]: RCFGBuilder took 5216.00 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 248.3 MB). Peak memory consumption was 248.3 MB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,579 INFO L168 Benchmark]: TraceAbstraction took 214438.66 ms. Allocated memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 924.3 MB in the end (delta: 981.9 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-27 10:26:01,587 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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. * CACSL2BoogieTranslator took 1153.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 295.97 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -858.1 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.27 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5216.00 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 248.3 MB). Peak memory consumption was 248.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214438.66 ms. Allocated memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: 1.7 GB). Free memory was 1.9 GB in the beginning and 924.3 MB in the end (delta: 981.9 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1467]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1467). Cancelled while BasicCegarLoop was constructing difference of abstraction (61702states) and FLOYD_HOARE automaton (currently 8 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (3645 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 312 locations, 1 error locations. TIMEOUT Result, 214.3s OverallTime, 12 OverallIterations, 6 TraceHistogramMax, 159.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2241 SDtfs, 21532 SDslu, 5064 SDs, 0 SdLazy, 31644 SolverSat, 5671 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.8s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 4768 GetRequests, 4485 SyntacticMatches, 28 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61702occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 21.1s AbstIntTime, 10 AbstIntIterations, 3 AbstIntStrong, 0.9988499972452658 AbsIntWeakeningRatio, 0.37988826815642457 AbsIntAvgWeakeningVarsNumRemoved, 43.04469273743017 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 7.7s AutomataMinimizationTime, 11 MinimizatonAttempts, 9503 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 10.0s InterpolantComputationTime, 4837 NumberOfCodeBlocks, 4837 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 6803 ConstructedInterpolants, 0 QuantifiedInterpolants, 3498456 SizeOfPredicates, 3 NumberOfNonLiveVariables, 9437 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 4035/4348 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown