java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:10:09,563 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:10:09,565 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:10:09,578 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:10:09,579 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:10:09,580 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:10:09,581 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:10:09,582 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:10:09,584 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:10:09,585 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:10:09,586 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:10:09,586 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:10:09,587 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:10:09,588 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:10:09,589 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:10:09,590 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:10:09,591 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:10:09,593 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:10:09,595 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:10:09,596 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:10:09,597 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:10:09,598 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:10:09,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:10:09,601 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:10:09,601 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:10:09,602 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:10:09,603 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:10:09,604 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:10:09,605 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:10:09,606 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:10:09,606 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:10:09,607 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:10:09,607 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:10:09,607 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:10:09,608 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:10:09,609 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:10:09,609 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:10:09,627 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:10:09,627 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:10:09,628 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:10:09,628 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:10:09,629 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:10:09,629 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:10:09,629 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:10:09,629 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:10:09,631 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:10:09,631 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:10:09,631 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:10:09,632 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:10:09,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:10:09,634 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:10:09,635 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:10:09,635 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:10:09,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:10:09,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:10:09,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:10:09,637 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:10:09,637 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:10:09,637 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:10:09,637 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:10:09,638 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:10:09,638 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:10:09,638 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:10:09,638 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:10:09,639 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:10:09,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:10:09,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:10:09,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:10:09,712 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:10:09,712 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:10:09,713 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10_true-unreach-call.c [2018-09-14 17:10:10,077 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eccea303/d3ddca531d8c4c15a5525428040af95a/FLAG6fb84a522 [2018-09-14 17:10:10,407 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:10:10,408 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10_true-unreach-call.c [2018-09-14 17:10:10,441 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eccea303/d3ddca531d8c4c15a5525428040af95a/FLAG6fb84a522 [2018-09-14 17:10:10,466 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8eccea303/d3ddca531d8c4c15a5525428040af95a [2018-09-14 17:10:10,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:10:10,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:10:10,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:10:10,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:10:10,498 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:10:10,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:10:10" (1/1) ... [2018-09-14 17:10:10,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2931cab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:10, skipping insertion in model container [2018-09-14 17:10:10,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:10:10" (1/1) ... [2018-09-14 17:10:10,517 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:10:11,088 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:10:11,108 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:10:11,254 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:10:11,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11 WrapperNode [2018-09-14 17:10:11,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:10:11,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:10:11,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:10:11,337 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:10:11,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:10:11,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:10:11,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:10:11,508 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:10:11,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... [2018-09-14 17:10:11,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:10:11,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:10:11,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:10:11,955 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:10:11,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 17:10:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:10:12,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:10:12,028 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:10:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:10:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:10:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:10:12,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:10:12,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:10:16,902 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:10:16,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:10:16 BoogieIcfgContainer [2018-09-14 17:10:16,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:10:16,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:10:16,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:10:16,908 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:10:16,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:10:10" (1/3) ... [2018-09-14 17:10:16,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9c91d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:10:16, skipping insertion in model container [2018-09-14 17:10:16,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:10:11" (2/3) ... [2018-09-14 17:10:16,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e9c91d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:10:16, skipping insertion in model container [2018-09-14 17:10:16,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:10:16" (3/3) ... [2018-09-14 17:10:16,912 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label10_true-unreach-call.c [2018-09-14 17:10:16,922 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:10:16,933 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:10:16,986 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:10:16,987 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:10:16,987 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:10:16,987 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:10:16,988 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:10:16,988 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:10:16,988 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:10:16,988 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:10:16,988 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:10:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-14 17:10:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-14 17:10:17,026 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:17,028 INFO L376 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] [2018-09-14 17:10:17,029 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash -250768471, now seen corresponding path program 1 times [2018-09-14 17:10:17,038 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:17,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:17,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:17,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:17,093 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:17,499 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:10:17,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:10:17,500 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:17,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:10:17,519 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:10:17,520 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:17,523 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-09-14 17:10:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:21,193 INFO L93 Difference]: Finished difference Result 1001 states and 1780 transitions. [2018-09-14 17:10:21,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:10:21,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2018-09-14 17:10:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:21,219 INFO L225 Difference]: With dead ends: 1001 [2018-09-14 17:10:21,219 INFO L226 Difference]: Without dead ends: 702 [2018-09-14 17:10:21,230 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2018-09-14 17:10:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 699. [2018-09-14 17:10:21,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2018-09-14 17:10:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1082 transitions. [2018-09-14 17:10:21,345 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1082 transitions. Word has length 29 [2018-09-14 17:10:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:21,346 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1082 transitions. [2018-09-14 17:10:21,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:10:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1082 transitions. [2018-09-14 17:10:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-14 17:10:21,352 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:21,353 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 17:10:21,353 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2105116581, now seen corresponding path program 1 times [2018-09-14 17:10:21,354 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:21,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:21,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:21,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:21,356 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:21,687 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:10:21,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:10:21,687 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:21,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:10:21,689 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:10:21,690 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:10:21,690 INFO L87 Difference]: Start difference. First operand 699 states and 1082 transitions. Second operand 6 states. [2018-09-14 17:10:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:26,309 INFO L93 Difference]: Finished difference Result 2534 states and 4100 transitions. [2018-09-14 17:10:26,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:10:26,310 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2018-09-14 17:10:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:26,332 INFO L225 Difference]: With dead ends: 2534 [2018-09-14 17:10:26,333 INFO L226 Difference]: Without dead ends: 1841 [2018-09-14 17:10:26,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:10:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2018-09-14 17:10:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1815. [2018-09-14 17:10:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1815 states. [2018-09-14 17:10:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2683 transitions. [2018-09-14 17:10:26,430 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2683 transitions. Word has length 102 [2018-09-14 17:10:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:26,431 INFO L480 AbstractCegarLoop]: Abstraction has 1815 states and 2683 transitions. [2018-09-14 17:10:26,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:10:26,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2683 transitions. [2018-09-14 17:10:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-14 17:10:26,434 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:26,434 INFO L376 BasicCegarLoop]: trace histogram [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] [2018-09-14 17:10:26,434 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash 367698756, now seen corresponding path program 1 times [2018-09-14 17:10:26,435 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:26,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:26,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:26,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:26,436 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:26,625 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:10:26,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:10:26,626 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:26,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:10:26,626 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:10:26,627 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:26,627 INFO L87 Difference]: Start difference. First operand 1815 states and 2683 transitions. Second operand 4 states. [2018-09-14 17:10:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:29,285 INFO L93 Difference]: Finished difference Result 4796 states and 7372 transitions. [2018-09-14 17:10:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:10:29,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2018-09-14 17:10:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:29,307 INFO L225 Difference]: With dead ends: 4796 [2018-09-14 17:10:29,308 INFO L226 Difference]: Without dead ends: 2987 [2018-09-14 17:10:29,319 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2018-09-14 17:10:29,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 2970. [2018-09-14 17:10:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2970 states. [2018-09-14 17:10:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4362 transitions. [2018-09-14 17:10:29,424 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4362 transitions. Word has length 103 [2018-09-14 17:10:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:29,425 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 4362 transitions. [2018-09-14 17:10:29,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:10:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4362 transitions. [2018-09-14 17:10:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-14 17:10:29,438 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:29,439 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:10:29,439 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash -537163217, now seen corresponding path program 1 times [2018-09-14 17:10:29,439 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:29,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:29,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:29,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:29,441 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:29,897 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:10:29,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:10:29,898 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:29,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:10:29,898 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:10:29,899 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:10:29,899 INFO L87 Difference]: Start difference. First operand 2970 states and 4362 transitions. Second operand 6 states. [2018-09-14 17:10:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:33,704 INFO L93 Difference]: Finished difference Result 11412 states and 20997 transitions. [2018-09-14 17:10:33,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-14 17:10:33,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2018-09-14 17:10:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:33,897 INFO L225 Difference]: With dead ends: 11412 [2018-09-14 17:10:33,897 INFO L226 Difference]: Without dead ends: 8448 [2018-09-14 17:10:33,972 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-14 17:10:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2018-09-14 17:10:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 7652. [2018-09-14 17:10:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7652 states. [2018-09-14 17:10:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7652 states to 7652 states and 11186 transitions. [2018-09-14 17:10:34,293 INFO L78 Accepts]: Start accepts. Automaton has 7652 states and 11186 transitions. Word has length 128 [2018-09-14 17:10:34,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:34,294 INFO L480 AbstractCegarLoop]: Abstraction has 7652 states and 11186 transitions. [2018-09-14 17:10:34,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:10:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 7652 states and 11186 transitions. [2018-09-14 17:10:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-14 17:10:34,302 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:34,302 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:10:34,302 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash -388558922, now seen corresponding path program 1 times [2018-09-14 17:10:34,303 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:34,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:34,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:34,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:34,304 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:34,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:10:34,836 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 17:10:34,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:34,853 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:10:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:34,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:10:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:35,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:10:35,455 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:35,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:10:35,488 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:10:35,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:35,516 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:10:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:35,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:10:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:35,988 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:10:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (3)] Exception during sending of exit command (exit): Broken pipe [2018-09-14 17:10:36,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:10:36,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 7, 5] total 9 [2018-09-14 17:10:36,116 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:10:36,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:10:36,117 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:10:36,117 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:10:36,117 INFO L87 Difference]: Start difference. First operand 7652 states and 11186 transitions. Second operand 6 states. [2018-09-14 17:10:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:39,874 INFO L93 Difference]: Finished difference Result 17401 states and 28555 transitions. [2018-09-14 17:10:39,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:10:39,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2018-09-14 17:10:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:39,972 INFO L225 Difference]: With dead ends: 17401 [2018-09-14 17:10:39,972 INFO L226 Difference]: Without dead ends: 9755 [2018-09-14 17:10:40,067 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 698 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:10:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2018-09-14 17:10:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 9484. [2018-09-14 17:10:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9484 states. [2018-09-14 17:10:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9484 states to 9484 states and 12723 transitions. [2018-09-14 17:10:40,411 INFO L78 Accepts]: Start accepts. Automaton has 9484 states and 12723 transitions. Word has length 176 [2018-09-14 17:10:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:40,412 INFO L480 AbstractCegarLoop]: Abstraction has 9484 states and 12723 transitions. [2018-09-14 17:10:40,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:10:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9484 states and 12723 transitions. [2018-09-14 17:10:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-14 17:10:40,421 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:40,421 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:10:40,422 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash 171830202, now seen corresponding path program 1 times [2018-09-14 17:10:40,422 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:40,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:40,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:40,423 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:10:40,757 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:10:40,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-14 17:10:40,757 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-14 17:10:40,758 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-14 17:10:40,758 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:40,758 INFO L87 Difference]: Start difference. First operand 9484 states and 12723 transitions. Second operand 4 states. [2018-09-14 17:10:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:42,989 INFO L93 Difference]: Finished difference Result 23052 states and 32827 transitions. [2018-09-14 17:10:42,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-14 17:10:42,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 194 [2018-09-14 17:10:42,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:43,061 INFO L225 Difference]: With dead ends: 23052 [2018-09-14 17:10:43,061 INFO L226 Difference]: Without dead ends: 13574 [2018-09-14 17:10:43,114 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-14 17:10:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13574 states. [2018-09-14 17:10:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13574 to 13096. [2018-09-14 17:10:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13096 states. [2018-09-14 17:10:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13096 states to 13096 states and 17501 transitions. [2018-09-14 17:10:43,458 INFO L78 Accepts]: Start accepts. Automaton has 13096 states and 17501 transitions. Word has length 194 [2018-09-14 17:10:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:43,459 INFO L480 AbstractCegarLoop]: Abstraction has 13096 states and 17501 transitions. [2018-09-14 17:10:43,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-14 17:10:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13096 states and 17501 transitions. [2018-09-14 17:10:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-14 17:10:43,468 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:43,468 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:10:43,468 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash 648144620, now seen corresponding path program 1 times [2018-09-14 17:10:43,469 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:43,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:43,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:43,470 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:44,100 WARN L178 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:10:44,591 WARN L178 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-09-14 17:10:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:10:44,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:10:44,860 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 17:10:44,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:44,877 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:10:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:44,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:10:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-09-14 17:10:45,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:10:45,635 WARN L178 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-14 17:10:45,804 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-14 17:10:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:10:46,343 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:10:46,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 11 [2018-09-14 17:10:46,344 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:10:46,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:10:46,345 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:10:46,345 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:10:46,345 INFO L87 Difference]: Start difference. First operand 13096 states and 17501 transitions. Second operand 5 states. [2018-09-14 17:10:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:10:49,988 INFO L93 Difference]: Finished difference Result 27608 states and 37157 transitions. [2018-09-14 17:10:49,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:10:49,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 198 [2018-09-14 17:10:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:10:50,050 INFO L225 Difference]: With dead ends: 27608 [2018-09-14 17:10:50,051 INFO L226 Difference]: Without dead ends: 14323 [2018-09-14 17:10:50,083 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:10:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14323 states. [2018-09-14 17:10:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14323 to 14268. [2018-09-14 17:10:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14268 states. [2018-09-14 17:10:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14268 states to 14268 states and 19252 transitions. [2018-09-14 17:10:50,397 INFO L78 Accepts]: Start accepts. Automaton has 14268 states and 19252 transitions. Word has length 198 [2018-09-14 17:10:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:10:50,397 INFO L480 AbstractCegarLoop]: Abstraction has 14268 states and 19252 transitions. [2018-09-14 17:10:50,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:10:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand 14268 states and 19252 transitions. [2018-09-14 17:10:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-09-14 17:10:50,409 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:10:50,409 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:10:50,410 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:10:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 877957787, now seen corresponding path program 1 times [2018-09-14 17:10:50,410 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:10:50,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:50,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:50,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:10:50,411 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:10:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:50,885 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 17:10:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-09-14 17:10:51,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:10:51,478 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 17:10:51,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:51,488 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:10:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:51,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:10:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:52,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:10:54,326 WARN L178 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 49 DAG size of output: 5 [2018-09-14 17:10:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:54,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:10:54,735 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:10:54,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:10:54,753 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:10:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:10:54,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:10:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:55,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:10:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:10:56,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:10:56,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 5] total 27 [2018-09-14 17:10:56,062 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:10:56,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:10:56,063 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:10:56,064 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2018-09-14 17:10:56,064 INFO L87 Difference]: Start difference. First operand 14268 states and 19252 transitions. Second operand 15 states. [2018-09-14 17:11:01,319 WARN L178 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-09-14 17:11:05,102 WARN L178 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2018-09-14 17:11:07,694 WARN L178 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-09-14 17:11:09,296 WARN L178 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-09-14 17:11:18,913 WARN L178 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2018-09-14 17:11:23,863 WARN L178 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2018-09-14 17:11:30,156 WARN L178 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2018-09-14 17:11:31,745 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2018-09-14 17:11:36,845 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-09-14 17:11:39,719 WARN L178 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2018-09-14 17:11:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:11:49,752 INFO L93 Difference]: Finished difference Result 45147 states and 62175 transitions. [2018-09-14 17:11:49,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-14 17:11:49,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 251 [2018-09-14 17:11:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:11:49,879 INFO L225 Difference]: With dead ends: 45147 [2018-09-14 17:11:49,879 INFO L226 Difference]: Without dead ends: 30885 [2018-09-14 17:11:49,937 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1150 GetRequests, 986 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9399 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=2712, Invalid=23047, Unknown=1, NotChecked=0, Total=25760 [2018-09-14 17:11:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30885 states. [2018-09-14 17:11:50,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30885 to 30669. [2018-09-14 17:11:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30669 states. [2018-09-14 17:11:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30669 states to 30669 states and 40515 transitions. [2018-09-14 17:11:50,843 INFO L78 Accepts]: Start accepts. Automaton has 30669 states and 40515 transitions. Word has length 251 [2018-09-14 17:11:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:11:50,844 INFO L480 AbstractCegarLoop]: Abstraction has 30669 states and 40515 transitions. [2018-09-14 17:11:50,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:11:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 30669 states and 40515 transitions. [2018-09-14 17:11:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-14 17:11:50,865 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:11:50,865 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:11:50,866 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:11:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash -458311476, now seen corresponding path program 1 times [2018-09-14 17:11:50,866 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:11:50,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:11:50,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:11:50,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:11:50,868 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:11:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:11:51,720 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:11:51,969 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:11:52,229 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 17:11:52,599 WARN L178 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-09-14 17:11:53,036 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 17:11:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 123 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:11:53,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:11:53,150 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-14 17:11:53,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:11:53,159 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:11:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:11:53,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:11:54,420 WARN L178 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2018-09-14 17:11:55,925 WARN L178 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2018-09-14 17:11:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:11:56,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:11:56,614 WARN L178 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2018-09-14 17:11:57,171 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 17:11:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 107 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:11:57,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:11:57,708 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:11:57,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:11:57,723 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:11:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:11:57,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:12:02,665 WARN L178 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2018-09-14 17:12:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:06,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:12:07,564 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2018-09-14 17:12:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 123 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:08,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:12:08,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9, 10, 12] total 33 [2018-09-14 17:12:08,601 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:12:08,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 17:12:08,602 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 17:12:08,602 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=853, Unknown=1, NotChecked=0, Total=1056 [2018-09-14 17:12:08,602 INFO L87 Difference]: Start difference. First operand 30669 states and 40515 transitions. Second operand 16 states. [2018-09-14 17:12:14,414 WARN L178 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-09-14 17:12:18,443 WARN L178 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-09-14 17:12:34,460 WARN L178 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-09-14 17:12:38,678 WARN L178 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2018-09-14 17:12:42,764 WARN L178 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2018-09-14 17:12:58,675 WARN L178 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-09-14 17:13:24,577 WARN L178 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2018-09-14 17:13:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:27,001 INFO L93 Difference]: Finished difference Result 74468 states and 104813 transitions. [2018-09-14 17:13:27,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-14 17:13:27,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 253 [2018-09-14 17:13:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:27,171 INFO L225 Difference]: With dead ends: 74468 [2018-09-14 17:13:27,171 INFO L226 Difference]: Without dead ends: 44185 [2018-09-14 17:13:27,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 995 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1048, Invalid=3107, Unknown=5, NotChecked=0, Total=4160 [2018-09-14 17:13:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44185 states. [2018-09-14 17:13:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44185 to 41938. [2018-09-14 17:13:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41938 states. [2018-09-14 17:13:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41938 states to 41938 states and 52370 transitions. [2018-09-14 17:13:28,190 INFO L78 Accepts]: Start accepts. Automaton has 41938 states and 52370 transitions. Word has length 253 [2018-09-14 17:13:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:28,190 INFO L480 AbstractCegarLoop]: Abstraction has 41938 states and 52370 transitions. [2018-09-14 17:13:28,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 17:13:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 41938 states and 52370 transitions. [2018-09-14 17:13:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-14 17:13:28,200 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:28,200 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:13:28,200 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 936880995, now seen corresponding path program 1 times [2018-09-14 17:13:28,201 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:28,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:28,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:28,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:28,202 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 51 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:28,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:28,765 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:13:28,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:28,775 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:28,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:29,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:29,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:29,668 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:13:29,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:29,686 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:29,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:30,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:30,543 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-09-14 17:13:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:30,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:30,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8, 5, 5] total 26 [2018-09-14 17:13:30,895 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:30,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-14 17:13:30,897 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-14 17:13:30,898 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2018-09-14 17:13:30,898 INFO L87 Difference]: Start difference. First operand 41938 states and 52370 transitions. Second operand 16 states. [2018-09-14 17:13:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:43,013 INFO L93 Difference]: Finished difference Result 99174 states and 142614 transitions. [2018-09-14 17:13:43,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-14 17:13:43,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 256 [2018-09-14 17:13:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:43,447 INFO L225 Difference]: With dead ends: 99174 [2018-09-14 17:13:43,447 INFO L226 Difference]: Without dead ends: 55838 [2018-09-14 17:13:43,573 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1008 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=903, Invalid=3789, Unknown=0, NotChecked=0, Total=4692 [2018-09-14 17:13:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55838 states. [2018-09-14 17:13:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55838 to 53172. [2018-09-14 17:13:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53172 states. [2018-09-14 17:13:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53172 states to 53172 states and 66788 transitions. [2018-09-14 17:13:45,129 INFO L78 Accepts]: Start accepts. Automaton has 53172 states and 66788 transitions. Word has length 256 [2018-09-14 17:13:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:45,129 INFO L480 AbstractCegarLoop]: Abstraction has 53172 states and 66788 transitions. [2018-09-14 17:13:45,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-14 17:13:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 53172 states and 66788 transitions. [2018-09-14 17:13:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-14 17:13:45,142 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:45,142 INFO L376 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:13:45,143 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -289913810, now seen corresponding path program 1 times [2018-09-14 17:13:45,143 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:45,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:45,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:45,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:45,144 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:45,483 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:13:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:46,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:46,226 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:13:46,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:46,234 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:46,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:46,809 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:46,997 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-09-14 17:13:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:47,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:47,593 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:13:47,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:47,610 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:47,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:48,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 45 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:49,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:49,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8, 8, 8] total 36 [2018-09-14 17:13:49,303 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:49,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-14 17:13:49,304 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-14 17:13:49,304 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2018-09-14 17:13:49,305 INFO L87 Difference]: Start difference. First operand 53172 states and 66788 transitions. Second operand 21 states. [2018-09-14 17:13:50,830 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-09-14 17:13:51,141 WARN L178 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2018-09-14 17:13:52,906 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2018-09-14 17:13:53,767 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2018-09-14 17:13:56,051 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2018-09-14 17:13:59,830 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2018-09-14 17:14:05,075 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 17:14:05,995 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-09-14 17:14:06,747 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-09-14 17:14:09,085 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2018-09-14 17:14:10,575 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2018-09-14 17:14:14,338 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 Received shutdown request... [2018-09-14 17:14:16,225 WARN L186 SmtUtils]: Removed 10 from assertion stack [2018-09-14 17:14:16,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-14 17:14:16,226 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:14:16,229 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:14:16,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:14:16 BoogieIcfgContainer [2018-09-14 17:14:16,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:14:16,231 INFO L168 Benchmark]: Toolchain (without parser) took 245747.89 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 598.5 MB. Max. memory is 7.1 GB. [2018-09-14 17:14:16,232 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:14:16,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 847.54 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. [2018-09-14 17:14:16,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 170.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:14:16,234 INFO L168 Benchmark]: Boogie Preprocessor took 446.66 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 821.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.5 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2018-09-14 17:14:16,234 INFO L168 Benchmark]: RCFGBuilder took 4948.44 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 177.0 MB). Peak memory consumption was 177.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:14:16,235 INFO L168 Benchmark]: TraceAbstraction took 239325.83 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 455.3 MB. Max. memory is 7.1 GB. [2018-09-14 17:14:16,240 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 847.54 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 170.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 446.66 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 821.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -950.5 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4948.44 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 177.0 MB). Peak memory consumption was 177.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239325.83 ms. Allocated memory was 2.4 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 2.1 GB in the beginning and 3.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 455.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 72). Cancelled while BasicCegarLoop was constructing difference of abstraction (53172states) and FLOYD_HOARE automaton (currently 121 states, 21 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 58. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 239.2s OverallTime, 11 OverallIterations, 3 TraceHistogramMax, 197.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2150 SDtfs, 30904 SDslu, 4570 SDs, 0 SdLazy, 52713 SolverSat, 9526 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 132.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5665 GetRequests, 5162 SyntacticMatches, 24 SemanticMatches, 478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19160 ImplicationChecksByTransitivity, 69.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53172occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.9s AutomataMinimizationTime, 10 MinimizatonAttempts, 6775 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 33.3s InterpolantComputationTime, 4576 NumberOfCodeBlocks, 4576 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 7157 ConstructedInterpolants, 16 QuantifiedInterpolants, 17651889 SizeOfPredicates, 45 NumberOfNonLiveVariables, 4869 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 33 InterpolantComputations, 6 PerfectInterpolantSequences, 2670/3884 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label10_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-14-16-252.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label10_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-14-16-252.csv Completed graceful shutdown