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/Problem16_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:03:22,216 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:03:22,218 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:03:22,232 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:03:22,232 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:03:22,233 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:03:22,234 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:03:22,236 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:03:22,238 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:03:22,238 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:03:22,239 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:03:22,240 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:03:22,241 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:03:22,242 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:03:22,243 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:03:22,243 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:03:22,244 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:03:22,246 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:03:22,248 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:03:22,250 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:03:22,251 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:03:22,252 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:03:22,255 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:03:22,255 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:03:22,255 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:03:22,256 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:03:22,258 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:03:22,258 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:03:22,259 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:03:22,260 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:03:22,261 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:03:22,261 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 12:03:22,262 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 12:03:22,262 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 12:03:22,263 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 12:03:22,264 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 12:03:22,264 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 [2018-09-18 12:03:22,284 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:03:22,284 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:03:22,285 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:03:22,285 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:03:22,285 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:03:22,286 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:03:22,286 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:03:22,286 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:03:22,286 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:03:22,287 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:03:22,288 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:03:22,288 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:03:22,290 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:03:22,291 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:03:22,291 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:03:22,291 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:03:22,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:03:22,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:03:22,292 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:03:22,292 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:03:22,292 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:03:22,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:03:22,293 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:03:22,293 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:03:22,293 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:03:22,295 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:03:22,295 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:03:22,295 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:03:22,295 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:03:22,295 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:03:22,296 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:03:22,296 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:03:22,296 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:03:22,296 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:03:22,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:03:22,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:03:22,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:03:22,368 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:03:22,369 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:03:22,370 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-09-18 12:03:22,700 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838255d64/46b565cd2a4b41c781488f3d4c8f8a68/FLAGd78f33d30 [2018-09-18 12:03:23,156 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:03:23,157 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label16_true-unreach-call.c [2018-09-18 12:03:23,177 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838255d64/46b565cd2a4b41c781488f3d4c8f8a68/FLAGd78f33d30 [2018-09-18 12:03:23,194 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838255d64/46b565cd2a4b41c781488f3d4c8f8a68 [2018-09-18 12:03:23,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:03:23,212 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:03:23,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:03:23,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:03:23,221 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:03:23,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:03:23" (1/1) ... [2018-09-18 12:03:23,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6b114a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:23, skipping insertion in model container [2018-09-18 12:03:23,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:03:23" (1/1) ... [2018-09-18 12:03:23,240 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:03:24,055 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:03:24,074 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:03:24,319 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:03:24,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24 WrapperNode [2018-09-18 12:03:24,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:03:24,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:03:24,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:03:24,434 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:03:24,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:24,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:24,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:03:24,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:03:24,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:03:24,615 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:03:24,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:24,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:24,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:24,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:25,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:25,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:25,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (1/1) ... [2018-09-18 12:03:25,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:03:25,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:03:25,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:03:25,108 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:03:25,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (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 [2018-09-18 12:03:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:03:25,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:03:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:03:25,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:03:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:03:25,182 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:03:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:03:25,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:03:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:03:25,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:03:33,260 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:03:33,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:03:33 BoogieIcfgContainer [2018-09-18 12:03:33,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:03:33,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:03:33,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:03:33,266 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:03:33,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:03:23" (1/3) ... [2018-09-18 12:03:33,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7c7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:03:33, skipping insertion in model container [2018-09-18 12:03:33,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:03:24" (2/3) ... [2018-09-18 12:03:33,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7c7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:03:33, skipping insertion in model container [2018-09-18 12:03:33,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:03:33" (3/3) ... [2018-09-18 12:03:33,270 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label16_true-unreach-call.c [2018-09-18 12:03:33,281 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:03:33,290 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:03:33,349 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:03:33,350 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:03:33,350 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:03:33,351 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:03:33,351 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:03:33,351 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:03:33,351 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:03:33,351 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:03:33,352 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:03:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-18 12:03:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-18 12:03:33,407 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:03:33,408 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:03:33,409 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:03:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash 657368747, now seen corresponding path program 1 times [2018-09-18 12:03:33,416 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:03:33,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:33,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:03:33,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:33,477 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:03:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:03:33,910 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:03:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:03:34,073 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:03:34,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:03:34,074 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:03:34,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:03:34,096 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:03:34,097 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:03:34,100 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-18 12:03:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:03:38,345 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-18 12:03:38,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:03:38,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2018-09-18 12:03:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:03:38,376 INFO L225 Difference]: With dead ends: 1156 [2018-09-18 12:03:38,376 INFO L226 Difference]: Without dead ends: 744 [2018-09-18 12:03:38,387 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:03:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-18 12:03:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-18 12:03:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-18 12:03:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1317 transitions. [2018-09-18 12:03:38,494 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1317 transitions. Word has length 49 [2018-09-18 12:03:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:03:38,495 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1317 transitions. [2018-09-18 12:03:38,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:03:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1317 transitions. [2018-09-18 12:03:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-18 12:03:38,507 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:03:38,507 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, 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] [2018-09-18 12:03:38,508 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:03:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash 591590536, now seen corresponding path program 1 times [2018-09-18 12:03:38,510 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:03:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:38,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:03:38,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:38,512 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:03:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:03:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:03:38,923 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:03:38,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:03:38,923 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:03:38,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:03:38,926 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:03:38,926 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:03:38,927 INFO L87 Difference]: Start difference. First operand 744 states and 1317 transitions. Second operand 6 states. [2018-09-18 12:03:43,396 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-18 12:03:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:03:53,896 INFO L93 Difference]: Finished difference Result 2960 states and 5492 transitions. [2018-09-18 12:03:53,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-18 12:03:53,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2018-09-18 12:03:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:03:53,923 INFO L225 Difference]: With dead ends: 2960 [2018-09-18 12:03:53,923 INFO L226 Difference]: Without dead ends: 2222 [2018-09-18 12:03:53,939 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-09-18 12:03:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2018-09-18 12:03:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2169. [2018-09-18 12:03:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2018-09-18 12:03:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3669 transitions. [2018-09-18 12:03:54,091 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3669 transitions. Word has length 125 [2018-09-18 12:03:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:03:54,092 INFO L480 AbstractCegarLoop]: Abstraction has 2169 states and 3669 transitions. [2018-09-18 12:03:54,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:03:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3669 transitions. [2018-09-18 12:03:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-18 12:03:54,103 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:03:54,103 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, 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] [2018-09-18 12:03:54,105 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:03:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash 975106256, now seen corresponding path program 1 times [2018-09-18 12:03:54,105 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:03:54,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:54,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:03:54,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:03:54,107 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:03:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:03:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:03:54,372 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:03:54,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:03:54,372 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:03:54,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:03:54,376 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:03:54,376 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:03:54,376 INFO L87 Difference]: Start difference. First operand 2169 states and 3669 transitions. Second operand 6 states. [2018-09-18 12:03:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:03:59,933 INFO L93 Difference]: Finished difference Result 8029 states and 14212 transitions. [2018-09-18 12:03:59,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:03:59,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2018-09-18 12:03:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:03:59,969 INFO L225 Difference]: With dead ends: 8029 [2018-09-18 12:03:59,969 INFO L226 Difference]: Without dead ends: 5866 [2018-09-18 12:04:00,002 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:04:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2018-09-18 12:04:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5815. [2018-09-18 12:04:00,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5815 states. [2018-09-18 12:04:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 8929 transitions. [2018-09-18 12:04:00,175 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 8929 transitions. Word has length 129 [2018-09-18 12:04:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:00,176 INFO L480 AbstractCegarLoop]: Abstraction has 5815 states and 8929 transitions. [2018-09-18 12:04:00,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:04:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 8929 transitions. [2018-09-18 12:04:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-18 12:04:00,179 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:00,179 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, 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] [2018-09-18 12:04:00,180 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:00,180 INFO L82 PathProgramCache]: Analyzing trace with hash -834708748, now seen corresponding path program 1 times [2018-09-18 12:04:00,180 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:00,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:00,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:00,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:00,182 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:00,422 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:04:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:00,586 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:04:00,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:04:00,586 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:00,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:04:00,587 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:04:00,587 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:04:00,588 INFO L87 Difference]: Start difference. First operand 5815 states and 8929 transitions. Second operand 6 states. [2018-09-18 12:04:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:07,076 INFO L93 Difference]: Finished difference Result 14127 states and 22920 transitions. [2018-09-18 12:04:07,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:04:07,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2018-09-18 12:04:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:07,143 INFO L225 Difference]: With dead ends: 14127 [2018-09-18 12:04:07,144 INFO L226 Difference]: Without dead ends: 8318 [2018-09-18 12:04:07,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:04:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2018-09-18 12:04:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 8243. [2018-09-18 12:04:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8243 states. [2018-09-18 12:04:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 12158 transitions. [2018-09-18 12:04:07,565 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 12158 transitions. Word has length 131 [2018-09-18 12:04:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:07,565 INFO L480 AbstractCegarLoop]: Abstraction has 8243 states and 12158 transitions. [2018-09-18 12:04:07,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:04:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 12158 transitions. [2018-09-18 12:04:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-18 12:04:07,571 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:07,571 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, 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] [2018-09-18 12:04:07,571 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash 845250593, now seen corresponding path program 1 times [2018-09-18 12:04:07,572 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:07,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:07,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:07,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:07,573 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:07,833 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:04:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:08,041 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:04:08,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:04:08,042 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:08,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:04:08,042 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:04:08,042 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:04:08,043 INFO L87 Difference]: Start difference. First operand 8243 states and 12158 transitions. Second operand 6 states. [2018-09-18 12:04:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:11,383 INFO L93 Difference]: Finished difference Result 19923 states and 31423 transitions. [2018-09-18 12:04:11,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:04:11,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2018-09-18 12:04:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:11,450 INFO L225 Difference]: With dead ends: 19923 [2018-09-18 12:04:11,450 INFO L226 Difference]: Without dead ends: 11686 [2018-09-18 12:04:11,478 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:04:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11686 states. [2018-09-18 12:04:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11686 to 11640. [2018-09-18 12:04:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11640 states. [2018-09-18 12:04:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11640 states to 11640 states and 16576 transitions. [2018-09-18 12:04:11,818 INFO L78 Accepts]: Start accepts. Automaton has 11640 states and 16576 transitions. Word has length 134 [2018-09-18 12:04:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:11,818 INFO L480 AbstractCegarLoop]: Abstraction has 11640 states and 16576 transitions. [2018-09-18 12:04:11,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:04:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 11640 states and 16576 transitions. [2018-09-18 12:04:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-18 12:04:11,821 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:11,822 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, 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] [2018-09-18 12:04:11,822 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1926747012, now seen corresponding path program 1 times [2018-09-18 12:04:11,822 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:11,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:11,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:11,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:11,824 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:12,072 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:04:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:12,474 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:04:12,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:04:12,475 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:12,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:04:12,476 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:04:12,476 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:04:12,476 INFO L87 Difference]: Start difference. First operand 11640 states and 16576 transitions. Second operand 6 states. [2018-09-18 12:04:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:15,591 INFO L93 Difference]: Finished difference Result 25059 states and 36462 transitions. [2018-09-18 12:04:15,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:04:15,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-09-18 12:04:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:15,667 INFO L225 Difference]: With dead ends: 25059 [2018-09-18 12:04:15,668 INFO L226 Difference]: Without dead ends: 13425 [2018-09-18 12:04:15,704 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:04:15,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13425 states. [2018-09-18 12:04:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13425 to 13399. [2018-09-18 12:04:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13399 states. [2018-09-18 12:04:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13399 states to 13399 states and 17766 transitions. [2018-09-18 12:04:16,038 INFO L78 Accepts]: Start accepts. Automaton has 13399 states and 17766 transitions. Word has length 139 [2018-09-18 12:04:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:16,038 INFO L480 AbstractCegarLoop]: Abstraction has 13399 states and 17766 transitions. [2018-09-18 12:04:16,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:04:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13399 states and 17766 transitions. [2018-09-18 12:04:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-18 12:04:16,040 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:16,041 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:04:16,041 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 520725928, now seen corresponding path program 1 times [2018-09-18 12:04:16,041 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:16,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:16,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:16,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:16,043 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:16,272 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:04:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-18 12:04:16,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:16,475 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 [2018-09-18 12:04:16,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:16,495 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:16,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:16,745 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:17,027 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:04:17,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2018-09-18 12:04:17,028 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:17,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:04:17,028 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:04:17,029 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:04:17,029 INFO L87 Difference]: Start difference. First operand 13399 states and 17766 transitions. Second operand 3 states. [2018-09-18 12:04:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:21,888 INFO L93 Difference]: Finished difference Result 33128 states and 45210 transitions. [2018-09-18 12:04:21,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:04:21,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2018-09-18 12:04:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:22,001 INFO L225 Difference]: With dead ends: 33128 [2018-09-18 12:04:22,002 INFO L226 Difference]: Without dead ends: 19735 [2018-09-18 12:04:22,116 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:04:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19735 states. [2018-09-18 12:04:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19735 to 19574. [2018-09-18 12:04:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19574 states. [2018-09-18 12:04:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19574 states to 19574 states and 24875 transitions. [2018-09-18 12:04:22,735 INFO L78 Accepts]: Start accepts. Automaton has 19574 states and 24875 transitions. Word has length 141 [2018-09-18 12:04:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:22,736 INFO L480 AbstractCegarLoop]: Abstraction has 19574 states and 24875 transitions. [2018-09-18 12:04:22,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:04:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19574 states and 24875 transitions. [2018-09-18 12:04:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-09-18 12:04:22,753 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:22,754 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:04:22,754 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash 732894449, now seen corresponding path program 1 times [2018-09-18 12:04:22,755 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:22,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:22,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:22,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:22,757 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:23,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:23,676 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:04:23,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:23,692 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:23,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:24,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:25,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:25,499 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 4 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 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:04:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:25,531 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:25,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:26,125 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:04:26,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:04:26,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-18 12:04:26,411 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:04:26,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:04:26,413 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:04:26,413 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-18 12:04:26,414 INFO L87 Difference]: Start difference. First operand 19574 states and 24875 transitions. Second operand 9 states. [2018-09-18 12:04:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:33,784 INFO L93 Difference]: Finished difference Result 48675 states and 68303 transitions. [2018-09-18 12:04:33,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-18 12:04:33,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 415 [2018-09-18 12:04:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:33,959 INFO L225 Difference]: With dead ends: 48675 [2018-09-18 12:04:33,960 INFO L226 Difference]: Without dead ends: 29107 [2018-09-18 12:04:34,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1678 GetRequests, 1654 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-09-18 12:04:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29107 states. [2018-09-18 12:04:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29107 to 28942. [2018-09-18 12:04:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28942 states. [2018-09-18 12:04:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28942 states to 28942 states and 37712 transitions. [2018-09-18 12:04:35,589 INFO L78 Accepts]: Start accepts. Automaton has 28942 states and 37712 transitions. Word has length 415 [2018-09-18 12:04:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:35,590 INFO L480 AbstractCegarLoop]: Abstraction has 28942 states and 37712 transitions. [2018-09-18 12:04:35,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:04:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28942 states and 37712 transitions. [2018-09-18 12:04:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2018-09-18 12:04:35,698 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:35,699 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:04:35,699 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash -57691896, now seen corresponding path program 1 times [2018-09-18 12:04:35,700 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:35,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:35,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:35,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:35,702 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 395 proven. 142 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-09-18 12:04:36,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:36,731 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 [2018-09-18 12:04:36,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:36,738 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:36,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 699 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-18 12:04:37,238 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 395 proven. 142 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-09-18 12:04:37,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:37,823 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 [2018-09-18 12:04:37,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:37,841 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:38,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 699 proven. 2 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-09-18 12:04:38,544 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 395 proven. 142 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-09-18 12:04:38,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:04:38,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:04:38,978 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:04:38,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:04:38,980 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:04:38,980 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:04:38,980 INFO L87 Difference]: Start difference. First operand 28942 states and 37712 transitions. Second operand 9 states. [2018-09-18 12:04:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:48,039 INFO L93 Difference]: Finished difference Result 69966 states and 108148 transitions. [2018-09-18 12:04:48,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 12:04:48,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 658 [2018-09-18 12:04:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:48,453 INFO L225 Difference]: With dead ends: 69966 [2018-09-18 12:04:48,454 INFO L226 Difference]: Without dead ends: 41030 [2018-09-18 12:04:48,759 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2654 GetRequests, 2629 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-18 12:04:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41030 states. [2018-09-18 12:04:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41030 to 38798. [2018-09-18 12:04:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38798 states. [2018-09-18 12:04:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38798 states to 38798 states and 48862 transitions. [2018-09-18 12:04:50,653 INFO L78 Accepts]: Start accepts. Automaton has 38798 states and 48862 transitions. Word has length 658 [2018-09-18 12:04:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:50,653 INFO L480 AbstractCegarLoop]: Abstraction has 38798 states and 48862 transitions. [2018-09-18 12:04:50,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:04:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 38798 states and 48862 transitions. [2018-09-18 12:04:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2018-09-18 12:04:50,758 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:50,759 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:04:50,759 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:50,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1536745445, now seen corresponding path program 1 times [2018-09-18 12:04:50,760 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:50,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:50,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:50,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:50,761 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2018-09-18 12:04:51,350 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:04:51,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:04:51,350 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:51,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:04:51,351 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:04:51,351 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:04:51,352 INFO L87 Difference]: Start difference. First operand 38798 states and 48862 transitions. Second operand 4 states. [2018-09-18 12:04:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:04:55,296 INFO L93 Difference]: Finished difference Result 73849 states and 90890 transitions. [2018-09-18 12:04:55,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:04:55,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 683 [2018-09-18 12:04:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:04:55,416 INFO L225 Difference]: With dead ends: 73849 [2018-09-18 12:04:55,416 INFO L226 Difference]: Without dead ends: 35156 [2018-09-18 12:04:55,655 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 [2018-09-18 12:04:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35156 states. [2018-09-18 12:04:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35156 to 35123. [2018-09-18 12:04:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35123 states. [2018-09-18 12:04:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35123 states to 35123 states and 40181 transitions. [2018-09-18 12:04:57,100 INFO L78 Accepts]: Start accepts. Automaton has 35123 states and 40181 transitions. Word has length 683 [2018-09-18 12:04:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:04:57,101 INFO L480 AbstractCegarLoop]: Abstraction has 35123 states and 40181 transitions. [2018-09-18 12:04:57,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:04:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 35123 states and 40181 transitions. [2018-09-18 12:04:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2018-09-18 12:04:57,146 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:04:57,147 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:04:57,147 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:04:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1630457569, now seen corresponding path program 1 times [2018-09-18 12:04:57,148 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:04:57,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:57,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:57,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:04:57,149 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:04:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:57,802 WARN L178 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:04:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 550 proven. 237 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-09-18 12:04:58,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:04:58,582 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 [2018-09-18 12:04:58,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:04:58,591 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:04:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:04:58,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:04:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-09-18 12:04:59,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:04:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-09-18 12:04:59,950 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:04:59,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-18 12:04:59,950 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:04:59,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:04:59,951 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:04:59,952 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:04:59,952 INFO L87 Difference]: Start difference. First operand 35123 states and 40181 transitions. Second operand 3 states. [2018-09-18 12:05:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:03,044 INFO L93 Difference]: Finished difference Result 68490 states and 78380 transitions. [2018-09-18 12:05:03,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:05:03,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 737 [2018-09-18 12:05:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:03,134 INFO L225 Difference]: With dead ends: 68490 [2018-09-18 12:05:03,134 INFO L226 Difference]: Without dead ends: 33472 [2018-09-18 12:05:03,221 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1486 GetRequests, 1475 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:05:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33472 states. [2018-09-18 12:05:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33472 to 33106. [2018-09-18 12:05:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33106 states. [2018-09-18 12:05:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33106 states to 33106 states and 36879 transitions. [2018-09-18 12:05:03,739 INFO L78 Accepts]: Start accepts. Automaton has 33106 states and 36879 transitions. Word has length 737 [2018-09-18 12:05:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:03,740 INFO L480 AbstractCegarLoop]: Abstraction has 33106 states and 36879 transitions. [2018-09-18 12:05:03,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:05:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 33106 states and 36879 transitions. [2018-09-18 12:05:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2018-09-18 12:05:03,788 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:03,789 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:03,789 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2019539223, now seen corresponding path program 1 times [2018-09-18 12:05:03,790 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:03,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:03,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:03,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:03,791 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 1049 trivial. 0 not checked. [2018-09-18 12:05:04,702 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:05:04,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 12:05:04,702 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:04,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 12:05:04,703 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 12:05:04,703 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 12:05:04,703 INFO L87 Difference]: Start difference. First operand 33106 states and 36879 transitions. Second operand 4 states. [2018-09-18 12:05:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:09,711 INFO L93 Difference]: Finished difference Result 83485 states and 94202 transitions. [2018-09-18 12:05:09,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 12:05:09,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 861 [2018-09-18 12:05:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:09,852 INFO L225 Difference]: With dead ends: 83485 [2018-09-18 12:05:09,852 INFO L226 Difference]: Without dead ends: 50390 [2018-09-18 12:05:09,941 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 [2018-09-18 12:05:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50390 states. [2018-09-18 12:05:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50390 to 50049. [2018-09-18 12:05:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50049 states. [2018-09-18 12:05:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 55358 transitions. [2018-09-18 12:05:10,735 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 55358 transitions. Word has length 861 [2018-09-18 12:05:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:10,736 INFO L480 AbstractCegarLoop]: Abstraction has 50049 states and 55358 transitions. [2018-09-18 12:05:10,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 12:05:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 55358 transitions. [2018-09-18 12:05:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 975 [2018-09-18 12:05:10,800 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:10,801 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:10,801 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1884580560, now seen corresponding path program 1 times [2018-09-18 12:05:10,802 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:10,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:10,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:10,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:10,803 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 538 proven. 164 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2018-09-18 12:05:11,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:11,730 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:11,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:11,738 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:11,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1422 proven. 2 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-09-18 12:05:13,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 538 proven. 164 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2018-09-18 12:05:13,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:13,908 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:05:13,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:13,929 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:14,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1422 proven. 2 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2018-09-18 12:05:15,266 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 538 proven. 164 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2018-09-18 12:05:16,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:05:16,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 12:05:16,051 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:05:16,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:05:16,053 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:05:16,053 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:05:16,053 INFO L87 Difference]: Start difference. First operand 50049 states and 55358 transitions. Second operand 9 states. [2018-09-18 12:05:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:22,128 INFO L93 Difference]: Finished difference Result 103295 states and 115978 transitions. [2018-09-18 12:05:22,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 12:05:22,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 974 [2018-09-18 12:05:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:22,273 INFO L225 Difference]: With dead ends: 103295 [2018-09-18 12:05:22,273 INFO L226 Difference]: Without dead ends: 54703 [2018-09-18 12:05:22,371 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3912 GetRequests, 3890 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-09-18 12:05:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54703 states. [2018-09-18 12:05:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54703 to 53763. [2018-09-18 12:05:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53763 states. [2018-09-18 12:05:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53763 states to 53763 states and 59651 transitions. [2018-09-18 12:05:23,285 INFO L78 Accepts]: Start accepts. Automaton has 53763 states and 59651 transitions. Word has length 974 [2018-09-18 12:05:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:23,287 INFO L480 AbstractCegarLoop]: Abstraction has 53763 states and 59651 transitions. [2018-09-18 12:05:23,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:05:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 53763 states and 59651 transitions. [2018-09-18 12:05:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1011 [2018-09-18 12:05:23,406 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:23,407 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:23,407 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1341023342, now seen corresponding path program 1 times [2018-09-18 12:05:23,410 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:23,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:23,411 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 1063 proven. 434 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2018-09-18 12:05:25,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:25,529 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:25,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:25,549 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:25,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 1472 proven. 2 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2018-09-18 12:05:26,529 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 829 proven. 160 refuted. 0 times theorem prover too weak. 1238 trivial. 0 not checked. [2018-09-18 12:05:27,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:27,211 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:05:27,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:27,227 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:27,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 1708 proven. 4 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2018-09-18 12:05:28,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 1065 proven. 300 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2018-09-18 12:05:29,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:05:29,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-18 12:05:29,173 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:05:29,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:05:29,175 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:05:29,175 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-18 12:05:29,175 INFO L87 Difference]: Start difference. First operand 53763 states and 59651 transitions. Second operand 9 states. [2018-09-18 12:05:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:35,005 INFO L93 Difference]: Finished difference Result 120464 states and 135388 transitions. [2018-09-18 12:05:35,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 12:05:35,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1010 [2018-09-18 12:05:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:35,242 INFO L225 Difference]: With dead ends: 120464 [2018-09-18 12:05:35,243 INFO L226 Difference]: Without dead ends: 45099 [2018-09-18 12:05:35,422 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4056 GetRequests, 4031 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2018-09-18 12:05:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45099 states. [2018-09-18 12:05:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45099 to 43886. [2018-09-18 12:05:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43886 states. [2018-09-18 12:05:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43886 states to 43886 states and 46232 transitions. [2018-09-18 12:05:36,324 INFO L78 Accepts]: Start accepts. Automaton has 43886 states and 46232 transitions. Word has length 1010 [2018-09-18 12:05:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:36,326 INFO L480 AbstractCegarLoop]: Abstraction has 43886 states and 46232 transitions. [2018-09-18 12:05:36,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:05:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 43886 states and 46232 transitions. [2018-09-18 12:05:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1505 [2018-09-18 12:05:36,453 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:36,454 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:05:36,455 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1846905177, now seen corresponding path program 1 times [2018-09-18 12:05:36,456 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:36,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:36,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:36,457 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:37,337 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-09-18 12:05:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 859 proven. 644 refuted. 0 times theorem prover too weak. 2226 trivial. 0 not checked. [2018-09-18 12:05:41,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:41,727 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:41,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:41,734 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:42,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 1185 proven. 0 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-09-18 12:05:44,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:05:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 294 proven. 1119 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2018-09-18 12:05:46,431 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:05:46,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2018-09-18 12:05:46,432 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:05:46,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:05:46,433 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:05:46,433 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-09-18 12:05:46,433 INFO L87 Difference]: Start difference. First operand 43886 states and 46232 transitions. Second operand 5 states. [2018-09-18 12:05:50,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:05:50,441 INFO L93 Difference]: Finished difference Result 88819 states and 92724 transitions. [2018-09-18 12:05:50,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:05:50,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1504 [2018-09-18 12:05:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:05:50,614 INFO L225 Difference]: With dead ends: 88819 [2018-09-18 12:05:50,614 INFO L226 Difference]: Without dead ends: 44344 [2018-09-18 12:05:50,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3021 GetRequests, 3004 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-09-18 12:05:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44344 states. [2018-09-18 12:05:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44344 to 43598. [2018-09-18 12:05:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43598 states. [2018-09-18 12:05:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43598 states to 43598 states and 45093 transitions. [2018-09-18 12:05:51,304 INFO L78 Accepts]: Start accepts. Automaton has 43598 states and 45093 transitions. Word has length 1504 [2018-09-18 12:05:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:05:51,305 INFO L480 AbstractCegarLoop]: Abstraction has 43598 states and 45093 transitions. [2018-09-18 12:05:51,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:05:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43598 states and 45093 transitions. [2018-09-18 12:05:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1707 [2018-09-18 12:05:51,400 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:05:51,401 INFO L376 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-18 12:05:51,402 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:05:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1682096575, now seen corresponding path program 1 times [2018-09-18 12:05:51,403 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:05:51,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:51,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:51,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:05:51,404 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:05:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 1194 proven. 644 refuted. 0 times theorem prover too weak. 3794 trivial. 0 not checked. [2018-09-18 12:05:54,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:05:54,731 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:05:54,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:05:54,739 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:05:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:05:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:05:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 2458 proven. 2 refuted. 0 times theorem prover too weak. 3172 trivial. 0 not checked. [2018-09-18 12:05:57,070 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 414 proven. 2312 refuted. 0 times theorem prover too weak. 2906 trivial. 0 not checked. [2018-09-18 12:06:00,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:00,787 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 14 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 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:06:00,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:00,805 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:01,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 3851 proven. 14 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2018-09-18 12:06:03,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5632 backedges. 1194 proven. 644 refuted. 0 times theorem prover too weak. 3794 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (14)] Exception during sending of exit command (exit): Broken pipe [2018-09-18 12:06:07,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:06:07,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-09-18 12:06:07,748 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:06:07,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 12:06:07,752 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 12:06:07,753 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-09-18 12:06:07,753 INFO L87 Difference]: Start difference. First operand 43598 states and 45093 transitions. Second operand 14 states. [2018-09-18 12:06:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:06:24,258 INFO L93 Difference]: Finished difference Result 85537 states and 88628 transitions. [2018-09-18 12:06:24,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-18 12:06:24,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1706 [2018-09-18 12:06:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:06:24,383 INFO L225 Difference]: With dead ends: 85537 [2018-09-18 12:06:24,383 INFO L226 Difference]: Without dead ends: 44313 [2018-09-18 12:06:24,468 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6889 GetRequests, 6833 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2018-09-18 12:06:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44313 states. [2018-09-18 12:06:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44313 to 42920. [2018-09-18 12:06:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42920 states. [2018-09-18 12:06:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42920 states to 42920 states and 44370 transitions. [2018-09-18 12:06:24,978 INFO L78 Accepts]: Start accepts. Automaton has 42920 states and 44370 transitions. Word has length 1706 [2018-09-18 12:06:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:06:24,978 INFO L480 AbstractCegarLoop]: Abstraction has 42920 states and 44370 transitions. [2018-09-18 12:06:24,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 12:06:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42920 states and 44370 transitions. [2018-09-18 12:06:25,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1839 [2018-09-18 12:06:25,245 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:06:25,246 INFO L376 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:06:25,246 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:06:25,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2139461550, now seen corresponding path program 1 times [2018-09-18 12:06:25,247 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:06:25,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:25,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:25,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:06:25,248 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:06:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6906 backedges. 3377 proven. 2056 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2018-09-18 12:06:32,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:32,689 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:06:32,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:32,697 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:33,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6906 backedges. 2892 proven. 6 refuted. 0 times theorem prover too weak. 4008 trivial. 0 not checked. [2018-09-18 12:06:35,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6906 backedges. 461 proven. 2741 refuted. 0 times theorem prover too weak. 3704 trivial. 0 not checked. [2018-09-18 12:06:41,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:06:41,258 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 16 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 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:06:41,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:06:41,278 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:06:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:06:42,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:06:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6906 backedges. 2651 proven. 6 refuted. 0 times theorem prover too weak. 4249 trivial. 0 not checked. [2018-09-18 12:06:45,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:06:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6906 backedges. 463 proven. 2739 refuted. 0 times theorem prover too weak. 3704 trivial. 0 not checked. [2018-09-18 12:06:55,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:06:55,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 8, 7, 8] total 47 [2018-09-18 12:06:55,049 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:06:55,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-18 12:06:55,051 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-18 12:06:55,052 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2018-09-18 12:06:55,052 INFO L87 Difference]: Start difference. First operand 42920 states and 44370 transitions. Second operand 32 states. [2018-09-18 12:06:57,058 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 Received shutdown request... [2018-09-18 12:07:06,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-18 12:07:06,046 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:07:06,055 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:07:06,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:07:06 BoogieIcfgContainer [2018-09-18 12:07:06,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:07:06,056 INFO L168 Benchmark]: Toolchain (without parser) took 222849.76 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 685.7 MB in the end (delta: 701.0 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-09-18 12:07:06,059 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:07:06,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1218.59 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: 108.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2018-09-18 12:07:06,061 INFO L168 Benchmark]: Boogie Procedure Inliner took 181.27 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. [2018-09-18 12:07:06,061 INFO L168 Benchmark]: Boogie Preprocessor took 492.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 775.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -910.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-18 12:07:06,062 INFO L168 Benchmark]: RCFGBuilder took 8153.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 262.9 MB). Peak memory consumption was 262.9 MB. Max. memory is 7.1 GB. [2018-09-18 12:07:06,063 INFO L168 Benchmark]: TraceAbstraction took 212793.41 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 685.7 MB in the end (delta: 1.2 GB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-09-18 12:07:06,067 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1218.59 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: 108.3 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 181.27 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 492.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 775.4 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -910.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8153.36 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 262.9 MB). Peak memory consumption was 262.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 212793.41 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 685.7 MB in the end (delta: 1.2 GB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 133]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 133). Cancelled while BasicCegarLoop was constructing difference of abstraction (42920states) and FLOYD_HOARE automaton (currently 17 states, 32 states before enhancement), while ReachableStatesComputation was computing reachable states (2235 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 212.7s OverallTime, 17 OverallIterations, 11 TraceHistogramMax, 118.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3014 SDtfs, 34604 SDslu, 2961 SDs, 0 SdLazy, 68846 SolverSat, 9181 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 89.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31458 GetRequests, 31158 SyntacticMatches, 55 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53763occurred in iteration=13, 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: 11.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 7841 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 58.8s InterpolantComputationTime, 26818 NumberOfCodeBlocks, 26818 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 42355 ConstructedInterpolants, 0 QuantifiedInterpolants, 237631884 SizeOfPredicates, 20 NumberOfNonLiveVariables, 20552 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 47 InterpolantComputations, 13 PerfectInterpolantSequences, 90082/105120 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/Problem16_label16_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-07-06-080.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label16_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-07-06-080.csv Completed graceful shutdown