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_label53_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 12:07:37,053 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 12:07:37,056 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 12:07:37,069 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 12:07:37,070 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 12:07:37,071 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 12:07:37,072 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 12:07:37,075 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 12:07:37,077 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 12:07:37,078 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 12:07:37,078 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 12:07:37,079 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 12:07:37,080 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 12:07:37,081 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 12:07:37,082 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 12:07:37,083 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 12:07:37,083 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 12:07:37,085 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 12:07:37,090 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 12:07:37,091 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 12:07:37,092 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 12:07:37,094 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 12:07:37,099 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 12:07:37,099 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 12:07:37,099 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 12:07:37,100 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 12:07:37,102 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 12:07:37,103 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 12:07:37,104 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 12:07:37,107 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 12:07:37,108 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 12:07:37,108 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 12:07:37,108 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 12:07:37,109 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 12:07:37,110 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 12:07:37,110 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 12:07:37,111 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 12:07:37,126 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 12:07:37,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 12:07:37,128 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 12:07:37,128 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 12:07:37,128 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 12:07:37,128 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 12:07:37,128 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 12:07:37,129 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 12:07:37,129 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 12:07:37,129 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 12:07:37,129 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 12:07:37,129 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 12:07:37,130 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 12:07:37,130 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 12:07:37,130 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 12:07:37,131 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 12:07:37,131 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 12:07:37,131 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 12:07:37,131 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 12:07:37,131 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 12:07:37,131 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 12:07:37,132 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 12:07:37,132 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 12:07:37,132 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 12:07:37,132 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 12:07:37,132 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 12:07:37,133 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 12:07:37,133 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 12:07:37,133 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 12:07:37,133 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 12:07:37,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 12:07:37,134 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 12:07:37,134 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 12:07:37,134 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 12:07:37,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 12:07:37,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 12:07:37,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 12:07:37,214 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 12:07:37,215 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 12:07:37,215 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53_true-unreach-call.c [2018-09-18 12:07:37,563 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e68467a/07356391fec94d939c89170f987f62dc/FLAG66ae6fae2 [2018-09-18 12:07:37,942 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 12:07:37,943 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53_true-unreach-call.c [2018-09-18 12:07:37,964 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e68467a/07356391fec94d939c89170f987f62dc/FLAG66ae6fae2 [2018-09-18 12:07:37,982 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0e68467a/07356391fec94d939c89170f987f62dc [2018-09-18 12:07:37,995 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 12:07:37,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 12:07:37,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 12:07:37,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 12:07:38,006 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 12:07:38,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:07:37" (1/1) ... [2018-09-18 12:07:38,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d32f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:38, skipping insertion in model container [2018-09-18 12:07:38,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 12:07:37" (1/1) ... [2018-09-18 12:07:38,023 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 12:07:38,775 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:07:38,796 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 12:07:39,021 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 12:07:39,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39 WrapperNode [2018-09-18 12:07:39,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 12:07:39,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 12:07:39,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 12:07:39,128 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 12:07:39,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 12:07:39,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 12:07:39,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 12:07:39,322 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 12:07:39,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (1/1) ... [2018-09-18 12:07:39,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 12:07:39,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 12:07:39,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 12:07:39,786 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 12:07:39,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (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 12:07:39,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 12:07:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 12:07:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 12:07:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 12:07:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 12:07:39,860 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 12:07:39,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 12:07:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 12:07:39,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 12:07:39,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 12:07:46,858 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 12:07:46,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:07:46 BoogieIcfgContainer [2018-09-18 12:07:46,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 12:07:46,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 12:07:46,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 12:07:46,864 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 12:07:46,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 12:07:37" (1/3) ... [2018-09-18 12:07:46,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d77fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:07:46, skipping insertion in model container [2018-09-18 12:07:46,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 12:07:39" (2/3) ... [2018-09-18 12:07:46,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d77fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 12:07:46, skipping insertion in model container [2018-09-18 12:07:46,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 12:07:46" (3/3) ... [2018-09-18 12:07:46,873 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label53_true-unreach-call.c [2018-09-18 12:07:46,885 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 12:07:46,900 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 12:07:46,970 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 12:07:46,971 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 12:07:46,971 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 12:07:46,971 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 12:07:46,972 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 12:07:46,972 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 12:07:46,972 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 12:07:46,972 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 12:07:46,972 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 12:07:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-18 12:07:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-18 12:07:47,021 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:47,022 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] [2018-09-18 12:07:47,027 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1710890852, now seen corresponding path program 1 times [2018-09-18 12:07:47,035 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:47,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:47,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:47,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:47,084 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:47,496 WARN L178 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:07:47,542 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 12:07:47,544 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:07:47,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 12:07:47,545 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:07:47,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:07:47,566 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:07:47,567 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 12:07:47,569 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-18 12:07:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:50,930 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-18 12:07:50,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:07:50,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2018-09-18 12:07:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:50,958 INFO L225 Difference]: With dead ends: 1156 [2018-09-18 12:07:50,959 INFO L226 Difference]: Without dead ends: 744 [2018-09-18 12:07:50,968 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 12:07:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-18 12:07:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-18 12:07:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-18 12:07:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1355 transitions. [2018-09-18 12:07:51,074 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1355 transitions. Word has length 44 [2018-09-18 12:07:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:51,075 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1355 transitions. [2018-09-18 12:07:51,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:07:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1355 transitions. [2018-09-18 12:07:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-18 12:07:51,082 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:51,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:51,083 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1470767914, now seen corresponding path program 1 times [2018-09-18 12:07:51,084 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:51,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:51,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:51,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:51,086 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:51,472 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:07:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:07:51,556 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:07:51,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 12:07:51,556 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:07:51,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:07:51,559 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:07:51,559 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 12:07:51,559 INFO L87 Difference]: Start difference. First operand 744 states and 1355 transitions. Second operand 5 states. [2018-09-18 12:07:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:07:58,117 INFO L93 Difference]: Finished difference Result 2194 states and 4083 transitions. [2018-09-18 12:07:58,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:07:58,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2018-09-18 12:07:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:07:58,130 INFO L225 Difference]: With dead ends: 2194 [2018-09-18 12:07:58,130 INFO L226 Difference]: Without dead ends: 1456 [2018-09-18 12:07:58,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 12:07:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2018-09-18 12:07:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1436. [2018-09-18 12:07:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2018-09-18 12:07:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2550 transitions. [2018-09-18 12:07:58,199 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2550 transitions. Word has length 114 [2018-09-18 12:07:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:07:58,200 INFO L480 AbstractCegarLoop]: Abstraction has 1436 states and 2550 transitions. [2018-09-18 12:07:58,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:07:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2550 transitions. [2018-09-18 12:07:58,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-18 12:07:58,205 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:07:58,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:58,206 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:07:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -183601941, now seen corresponding path program 1 times [2018-09-18 12:07:58,206 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:07:58,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:58,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:07:58,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:07:58,210 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:07:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:07:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:07:58,487 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:07:58,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:07:58,487 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:07:58,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:07:58,488 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:07:58,491 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:07:58,492 INFO L87 Difference]: Start difference. First operand 1436 states and 2550 transitions. Second operand 6 states. [2018-09-18 12:08:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:03,336 INFO L93 Difference]: Finished difference Result 3936 states and 7024 transitions. [2018-09-18 12:08:03,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:08:03,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-09-18 12:08:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:03,360 INFO L225 Difference]: With dead ends: 3936 [2018-09-18 12:08:03,361 INFO L226 Difference]: Without dead ends: 2506 [2018-09-18 12:08:03,370 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 12:08:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2018-09-18 12:08:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2479. [2018-09-18 12:08:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2479 states. [2018-09-18 12:08:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2479 states to 2479 states and 3996 transitions. [2018-09-18 12:08:03,465 INFO L78 Accepts]: Start accepts. Automaton has 2479 states and 3996 transitions. Word has length 143 [2018-09-18 12:08:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:03,465 INFO L480 AbstractCegarLoop]: Abstraction has 2479 states and 3996 transitions. [2018-09-18 12:08:03,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:08:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2479 states and 3996 transitions. [2018-09-18 12:08:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-18 12:08:03,472 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:03,472 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:03,472 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1245396135, now seen corresponding path program 1 times [2018-09-18 12:08:03,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:03,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:03,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:03,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:03,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 12:08:03,760 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 12:08:03,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 12:08:03,760 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:08:03,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 12:08:03,761 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 12:08:03,761 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:08:03,761 INFO L87 Difference]: Start difference. First operand 2479 states and 3996 transitions. Second operand 6 states. [2018-09-18 12:08:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:06,872 INFO L93 Difference]: Finished difference Result 6050 states and 9896 transitions. [2018-09-18 12:08:06,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:08:06,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2018-09-18 12:08:06,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:06,900 INFO L225 Difference]: With dead ends: 6050 [2018-09-18 12:08:06,900 INFO L226 Difference]: Without dead ends: 3577 [2018-09-18 12:08:06,912 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 12:08:06,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2018-09-18 12:08:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3545. [2018-09-18 12:08:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3545 states. [2018-09-18 12:08:07,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4965 transitions. [2018-09-18 12:08:07,029 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4965 transitions. Word has length 161 [2018-09-18 12:08:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:07,029 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 4965 transitions. [2018-09-18 12:08:07,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 12:08:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4965 transitions. [2018-09-18 12:08:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-18 12:08:07,037 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:07,038 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:08:07,038 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash -282881664, now seen corresponding path program 1 times [2018-09-18 12:08:07,039 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:07,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:07,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:07,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:07,040 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 104 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:08:07,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:07,445 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 12:08:07,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:07,468 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:07,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-18 12:08:07,782 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-18 12:08:08,214 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:08:08,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2018-09-18 12:08:08,214 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:08:08,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:08:08,216 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:08:08,216 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:08:08,216 INFO L87 Difference]: Start difference. First operand 3545 states and 4965 transitions. Second operand 3 states. [2018-09-18 12:08:11,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:11,362 INFO L93 Difference]: Finished difference Result 7084 states and 9930 transitions. [2018-09-18 12:08:11,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:08:11,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 244 [2018-09-18 12:08:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:11,384 INFO L225 Difference]: With dead ends: 7084 [2018-09-18 12:08:11,384 INFO L226 Difference]: Without dead ends: 3545 [2018-09-18 12:08:11,398 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:08:11,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2018-09-18 12:08:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3545. [2018-09-18 12:08:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3545 states. [2018-09-18 12:08:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 4706 transitions. [2018-09-18 12:08:11,480 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 4706 transitions. Word has length 244 [2018-09-18 12:08:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:11,481 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 4706 transitions. [2018-09-18 12:08:11,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:08:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 4706 transitions. [2018-09-18 12:08:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-09-18 12:08:11,491 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:11,491 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 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 12:08:11,492 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash -733777857, now seen corresponding path program 1 times [2018-09-18 12:08:11,492 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:11,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:11,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:11,494 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 230 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-09-18 12:08:12,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:12,168 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 12:08:12,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:12,182 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:12,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 420 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-09-18 12:08:12,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:13,108 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 12:08:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 230 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2018-09-18 12:08:13,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:13,945 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 12:08:13,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:13,973 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:14,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 420 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-09-18 12:08:14,617 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 230 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (4)] Exception during sending of exit command (exit): Broken pipe [2018-09-18 12:08:15,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:08:15,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-18 12:08:15,104 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:08:15,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 12:08:15,105 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 12:08:15,105 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-18 12:08:15,106 INFO L87 Difference]: Start difference. First operand 3545 states and 4706 transitions. Second operand 9 states. [2018-09-18 12:08:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:21,976 INFO L93 Difference]: Finished difference Result 10015 states and 13843 transitions. [2018-09-18 12:08:21,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-18 12:08:21,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 407 [2018-09-18 12:08:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:22,023 INFO L225 Difference]: With dead ends: 10015 [2018-09-18 12:08:22,023 INFO L226 Difference]: Without dead ends: 6476 [2018-09-18 12:08:22,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1624 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2018-09-18 12:08:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2018-09-18 12:08:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 6434. [2018-09-18 12:08:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6434 states. [2018-09-18 12:08:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 8382 transitions. [2018-09-18 12:08:22,329 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 8382 transitions. Word has length 407 [2018-09-18 12:08:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:22,329 INFO L480 AbstractCegarLoop]: Abstraction has 6434 states and 8382 transitions. [2018-09-18 12:08:22,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 12:08:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 8382 transitions. [2018-09-18 12:08:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-09-18 12:08:22,355 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:22,356 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:08:22,356 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 913991280, now seen corresponding path program 1 times [2018-09-18 12:08:22,358 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:22,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:22,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:22,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:22,360 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:22,894 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-18 12:08:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 100 proven. 193 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 12:08:23,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:23,378 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 12:08:23,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:23,387 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:23,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-09-18 12:08:23,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-09-18 12:08:24,135 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 12:08:24,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2018-09-18 12:08:24,135 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:08:24,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 12:08:24,136 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 12:08:24,137 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:08:24,137 INFO L87 Difference]: Start difference. First operand 6434 states and 8382 transitions. Second operand 3 states. [2018-09-18 12:08:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:27,228 INFO L93 Difference]: Finished difference Result 14577 states and 19160 transitions. [2018-09-18 12:08:27,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 12:08:27,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2018-09-18 12:08:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:27,298 INFO L225 Difference]: With dead ends: 14577 [2018-09-18 12:08:27,301 INFO L226 Difference]: Without dead ends: 8149 [2018-09-18 12:08:27,366 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 1016 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-18 12:08:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2018-09-18 12:08:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 8149. [2018-09-18 12:08:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8149 states. [2018-09-18 12:08:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 10384 transitions. [2018-09-18 12:08:27,615 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 10384 transitions. Word has length 508 [2018-09-18 12:08:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:27,616 INFO L480 AbstractCegarLoop]: Abstraction has 8149 states and 10384 transitions. [2018-09-18 12:08:27,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 12:08:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 10384 transitions. [2018-09-18 12:08:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2018-09-18 12:08:27,657 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:27,657 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, 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, 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] [2018-09-18 12:08:27,658 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash -715828816, now seen corresponding path program 1 times [2018-09-18 12:08:27,658 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:27,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:27,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:27,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:27,660 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:28,061 WARN L178 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 12:08:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 148 proven. 343 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-09-18 12:08:28,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:28,798 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:08:28,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:28,815 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:28,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2018-09-18 12:08:29,512 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 148 proven. 343 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2018-09-18 12:08:30,023 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:08:30,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 12:08:30,023 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:08:30,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:08:30,025 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:08:30,025 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 12:08:30,025 INFO L87 Difference]: Start difference. First operand 8149 states and 10384 transitions. Second operand 5 states. [2018-09-18 12:08:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:35,011 INFO L93 Difference]: Finished difference Result 17715 states and 22632 transitions. [2018-09-18 12:08:35,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 12:08:35,014 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 622 [2018-09-18 12:08:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:35,063 INFO L225 Difference]: With dead ends: 17715 [2018-09-18 12:08:35,063 INFO L226 Difference]: Without dead ends: 9572 [2018-09-18 12:08:35,104 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1239 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 12:08:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9572 states. [2018-09-18 12:08:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9572 to 9550. [2018-09-18 12:08:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9550 states. [2018-09-18 12:08:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 11895 transitions. [2018-09-18 12:08:35,352 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 11895 transitions. Word has length 622 [2018-09-18 12:08:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:35,353 INFO L480 AbstractCegarLoop]: Abstraction has 9550 states and 11895 transitions. [2018-09-18 12:08:35,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:08:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 11895 transitions. [2018-09-18 12:08:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2018-09-18 12:08:35,392 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:35,392 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, 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, 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 12:08:35,393 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2084787412, now seen corresponding path program 1 times [2018-09-18 12:08:35,393 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:35,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:35,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:35,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:35,396 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 470 proven. 35 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-09-18 12:08:36,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:36,085 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 12:08:36,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:36,093 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:36,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 470 proven. 35 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-09-18 12:08:36,636 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-09-18 12:08:37,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:37,389 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:08:37,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:37,405 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:37,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 470 proven. 35 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-09-18 12:08:37,995 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-09-18 12:08:38,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:08:38,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 4, 4] total 13 [2018-09-18 12:08:38,713 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:08:38,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-18 12:08:38,715 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-18 12:08:38,715 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2018-09-18 12:08:38,716 INFO L87 Difference]: Start difference. First operand 9550 states and 11895 transitions. Second operand 7 states. [2018-09-18 12:08:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:48,508 INFO L93 Difference]: Finished difference Result 36012 states and 47364 transitions. [2018-09-18 12:08:48,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-18 12:08:48,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 652 [2018-09-18 12:08:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:48,592 INFO L225 Difference]: With dead ends: 36012 [2018-09-18 12:08:48,592 INFO L226 Difference]: Without dead ends: 19412 [2018-09-18 12:08:48,709 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2642 GetRequests, 2614 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2018-09-18 12:08:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2018-09-18 12:08:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 19347. [2018-09-18 12:08:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19347 states. [2018-09-18 12:08:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19347 states to 19347 states and 21496 transitions. [2018-09-18 12:08:49,132 INFO L78 Accepts]: Start accepts. Automaton has 19347 states and 21496 transitions. Word has length 652 [2018-09-18 12:08:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:49,133 INFO L480 AbstractCegarLoop]: Abstraction has 19347 states and 21496 transitions. [2018-09-18 12:08:49,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-18 12:08:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19347 states and 21496 transitions. [2018-09-18 12:08:49,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2018-09-18 12:08:49,195 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:49,196 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:08:49,197 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1446731419, now seen corresponding path program 1 times [2018-09-18 12:08:49,198 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:49,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:49,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:49,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:49,199 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 222 proven. 694 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2018-09-18 12:08:51,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:08:51,041 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:08:51,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:51,056 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:08:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:08:51,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:08:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2018-09-18 12:08:51,934 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:08:52,458 WARN L178 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2018-09-18 12:08:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 222 proven. 694 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2018-09-18 12:08:53,983 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 12:08:53,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2018-09-18 12:08:53,984 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 12:08:53,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 12:08:53,985 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 12:08:53,986 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-18 12:08:53,986 INFO L87 Difference]: Start difference. First operand 19347 states and 21496 transitions. Second operand 5 states. [2018-09-18 12:08:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:08:57,936 INFO L93 Difference]: Finished difference Result 43544 states and 48777 transitions. [2018-09-18 12:08:57,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 12:08:57,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1059 [2018-09-18 12:08:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:08:58,018 INFO L225 Difference]: With dead ends: 43544 [2018-09-18 12:08:58,018 INFO L226 Difference]: Without dead ends: 24203 [2018-09-18 12:08:58,094 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2125 GetRequests, 2115 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-18 12:08:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24203 states. [2018-09-18 12:08:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24203 to 24013. [2018-09-18 12:08:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24013 states. [2018-09-18 12:08:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24013 states to 24013 states and 26416 transitions. [2018-09-18 12:08:58,556 INFO L78 Accepts]: Start accepts. Automaton has 24013 states and 26416 transitions. Word has length 1059 [2018-09-18 12:08:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:08:58,556 INFO L480 AbstractCegarLoop]: Abstraction has 24013 states and 26416 transitions. [2018-09-18 12:08:58,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 12:08:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 24013 states and 26416 transitions. [2018-09-18 12:08:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1308 [2018-09-18 12:08:58,621 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:08:58,622 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, 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, 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, 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, 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] [2018-09-18 12:08:58,622 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:08:58,622 INFO L82 PathProgramCache]: Analyzing trace with hash -65623461, now seen corresponding path program 1 times [2018-09-18 12:08:58,623 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:08:58,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:58,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:08:58,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:08:58,624 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:08:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 808 proven. 110 refuted. 0 times theorem prover too weak. 2069 trivial. 0 not checked. [2018-09-18 12:09:00,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:09:00,770 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 12:09:00,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:00,778 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:09:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:01,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:09:02,121 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-09-18 12:09:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 1747 proven. 6 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2018-09-18 12:09:03,223 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:09:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 285 proven. 1633 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2018-09-18 12:09:06,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:09:06,984 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 12:09:07,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:07,000 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:09:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:07,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:09:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 1506 proven. 6 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2018-09-18 12:09:09,737 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:09:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2987 backedges. 287 proven. 1631 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (11)] Exception during sending of exit command (exit): Broken pipe [2018-09-18 12:09:16,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:09:16,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 8] total 28 [2018-09-18 12:09:16,486 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:09:16,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 12:09:16,488 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 12:09:16,488 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2018-09-18 12:09:16,488 INFO L87 Difference]: Start difference. First operand 24013 states and 26416 transitions. Second operand 13 states. [2018-09-18 12:09:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:09:28,811 INFO L93 Difference]: Finished difference Result 52475 states and 58466 transitions. [2018-09-18 12:09:28,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-18 12:09:28,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1307 [2018-09-18 12:09:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:09:28,920 INFO L225 Difference]: With dead ends: 52475 [2018-09-18 12:09:28,920 INFO L226 Difference]: Without dead ends: 29146 [2018-09-18 12:09:29,030 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5268 GetRequests, 5221 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2018-09-18 12:09:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29146 states. [2018-09-18 12:09:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29146 to 27159. [2018-09-18 12:09:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27159 states. [2018-09-18 12:09:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27159 states to 27159 states and 29636 transitions. [2018-09-18 12:09:29,557 INFO L78 Accepts]: Start accepts. Automaton has 27159 states and 29636 transitions. Word has length 1307 [2018-09-18 12:09:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:09:29,558 INFO L480 AbstractCegarLoop]: Abstraction has 27159 states and 29636 transitions. [2018-09-18 12:09:29,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 12:09:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27159 states and 29636 transitions. [2018-09-18 12:09:29,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1344 [2018-09-18 12:09:29,606 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:09:29,607 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, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 12:09:29,607 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:09:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash -12235047, now seen corresponding path program 1 times [2018-09-18 12:09:29,608 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:09:29,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:09:29,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:29,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:09:29,609 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:09:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 978 proven. 273 refuted. 0 times theorem prover too weak. 1615 trivial. 0 not checked. [2018-09-18 12:09:32,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:09:32,456 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 12:09:32,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:32,464 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:09:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:32,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:09:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 1656 proven. 2 refuted. 0 times theorem prover too weak. 1208 trivial. 0 not checked. [2018-09-18 12:09:34,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:09:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 243 proven. 1547 refuted. 0 times theorem prover too weak. 1076 trivial. 0 not checked. [2018-09-18 12:09:37,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:09:37,180 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:09:37,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:37,196 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:09:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:09:37,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:09:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 1923 proven. 14 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2018-09-18 12:09:38,950 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:09:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 978 proven. 273 refuted. 0 times theorem prover too weak. 1615 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (13)] Exception during sending of exit command (exit): Broken pipe [2018-09-18 12:09:41,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:09:41,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 6, 5] total 23 [2018-09-18 12:09:41,997 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:09:41,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-18 12:09:41,999 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-18 12:09:41,999 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2018-09-18 12:09:42,000 INFO L87 Difference]: Start difference. First operand 27159 states and 29636 transitions. Second operand 14 states. [2018-09-18 12:09:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:09:56,925 INFO L93 Difference]: Finished difference Result 55664 states and 62434 transitions. [2018-09-18 12:09:56,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-18 12:09:56,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1343 [2018-09-18 12:09:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:09:57,065 INFO L225 Difference]: With dead ends: 55664 [2018-09-18 12:09:57,065 INFO L226 Difference]: Without dead ends: 29529 [2018-09-18 12:09:57,198 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5438 GetRequests, 5381 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2018-09-18 12:09:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29529 states. [2018-09-18 12:09:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29529 to 25006. [2018-09-18 12:09:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25006 states. [2018-09-18 12:09:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25006 states to 25006 states and 27142 transitions. [2018-09-18 12:09:57,756 INFO L78 Accepts]: Start accepts. Automaton has 25006 states and 27142 transitions. Word has length 1343 [2018-09-18 12:09:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:09:57,757 INFO L480 AbstractCegarLoop]: Abstraction has 25006 states and 27142 transitions. [2018-09-18 12:09:57,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-18 12:09:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25006 states and 27142 transitions. [2018-09-18 12:09:57,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1424 [2018-09-18 12:09:57,803 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:09:57,804 INFO L376 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:09:57,805 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:09:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -266678635, now seen corresponding path program 1 times [2018-09-18 12:09:57,805 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:09:57,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:09:57,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:09:57,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:09:57,809 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:09:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 1362 proven. 35 refuted. 0 times theorem prover too weak. 2421 trivial. 0 not checked. [2018-09-18 12:10:00,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:00,348 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:10:00,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:00,356 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:00,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 1395 proven. 2 refuted. 0 times theorem prover too weak. 2421 trivial. 0 not checked. [2018-09-18 12:10:01,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:10:02,439 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-09-18 12:10:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 1395 proven. 2 refuted. 0 times theorem prover too weak. 2421 trivial. 0 not checked. [2018-09-18 12:10:05,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:05,303 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:10:05,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:05,321 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:06,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:06,747 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 18 [2018-09-18 12:10:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 2601 proven. 2 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2018-09-18 12:10:07,834 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:10:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 782 proven. 336 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2018-09-18 12:10:09,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:10:09,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 6, 5, 5] total 21 [2018-09-18 12:10:09,641 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:10:09,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 12:10:09,643 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 12:10:09,643 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2018-09-18 12:10:09,643 INFO L87 Difference]: Start difference. First operand 25006 states and 27142 transitions. Second operand 13 states. [2018-09-18 12:10:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:10:28,288 INFO L93 Difference]: Finished difference Result 59578 states and 65919 transitions. [2018-09-18 12:10:28,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-18 12:10:28,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1423 [2018-09-18 12:10:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:10:28,385 INFO L225 Difference]: With dead ends: 59578 [2018-09-18 12:10:28,386 INFO L226 Difference]: Without dead ends: 26987 [2018-09-18 12:10:28,746 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5777 GetRequests, 5715 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=537, Invalid=2769, Unknown=0, NotChecked=0, Total=3306 [2018-09-18 12:10:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26987 states. [2018-09-18 12:10:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26987 to 26302. [2018-09-18 12:10:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26302 states. [2018-09-18 12:10:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 28387 transitions. [2018-09-18 12:10:29,196 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 28387 transitions. Word has length 1423 [2018-09-18 12:10:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:10:29,197 INFO L480 AbstractCegarLoop]: Abstraction has 26302 states and 28387 transitions. [2018-09-18 12:10:29,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 12:10:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 28387 transitions. [2018-09-18 12:10:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1891 [2018-09-18 12:10:29,257 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:10:29,258 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:10:29,259 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:10:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -24017916, now seen corresponding path program 1 times [2018-09-18 12:10:29,259 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:10:29,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:29,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:29,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:10:29,262 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:10:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6747 backedges. 2811 proven. 1321 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2018-09-18 12:10:34,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:34,910 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:10:34,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:34,921 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:35,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6747 backedges. 3635 proven. 2 refuted. 0 times theorem prover too weak. 3110 trivial. 0 not checked. [2018-09-18 12:10:36,904 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:10:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6747 backedges. 1745 proven. 279 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2018-09-18 12:10:39,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:10:39,193 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 17 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 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:10:39,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:10:39,211 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:10:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:10:40,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:10:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6747 backedges. 4142 proven. 2 refuted. 0 times theorem prover too weak. 2603 trivial. 0 not checked. [2018-09-18 12:10:41,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:10:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6747 backedges. 896 proven. 567 refuted. 0 times theorem prover too weak. 5284 trivial. 0 not checked. [2018-09-18 12:10:44,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:10:44,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5, 5, 5] total 24 [2018-09-18 12:10:44,617 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:10:44,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-18 12:10:44,619 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-18 12:10:44,619 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2018-09-18 12:10:44,619 INFO L87 Difference]: Start difference. First operand 26302 states and 28387 transitions. Second operand 18 states. [2018-09-18 12:10:47,741 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-09-18 12:10:59,521 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-09-18 12:11:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 12:11:00,386 INFO L93 Difference]: Finished difference Result 52099 states and 56596 transitions. [2018-09-18 12:11:00,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-18 12:11:00,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1890 [2018-09-18 12:11:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 12:11:00,461 INFO L225 Difference]: With dead ends: 52099 [2018-09-18 12:11:00,461 INFO L226 Difference]: Without dead ends: 26821 [2018-09-18 12:11:00,606 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7674 GetRequests, 7590 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1053, Invalid=5427, Unknown=0, NotChecked=0, Total=6480 [2018-09-18 12:11:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26821 states. [2018-09-18 12:11:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26821 to 26304. [2018-09-18 12:11:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26304 states. [2018-09-18 12:11:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26304 states to 26304 states and 28082 transitions. [2018-09-18 12:11:01,109 INFO L78 Accepts]: Start accepts. Automaton has 26304 states and 28082 transitions. Word has length 1890 [2018-09-18 12:11:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 12:11:01,110 INFO L480 AbstractCegarLoop]: Abstraction has 26304 states and 28082 transitions. [2018-09-18 12:11:01,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-18 12:11:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 26304 states and 28082 transitions. [2018-09-18 12:11:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1963 [2018-09-18 12:11:01,172 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 12:11:01,173 INFO L376 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 12:11:01,173 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 12:11:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2014822318, now seen corresponding path program 1 times [2018-09-18 12:11:01,174 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 12:11:01,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:01,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:01,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 12:11:01,175 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 12:11:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 1189 proven. 4818 refuted. 0 times theorem prover too weak. 1496 trivial. 0 not checked. [2018-09-18 12:11:11,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:11:11,097 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 12:11:11,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:11,106 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:11:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:11,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:11:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 4500 proven. 2 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2018-09-18 12:11:13,099 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:11:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 953 proven. 636 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2018-09-18 12:11:16,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 12:11:16,750 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 19 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 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 12:11:16,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 12:11:16,766 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 12:11:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 12:11:17,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 12:11:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 4500 proven. 2 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2018-09-18 12:11:19,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 12:11:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 953 proven. 636 refuted. 0 times theorem prover too weak. 5914 trivial. 0 not checked. [2018-09-18 12:11:21,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 12:11:21,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5, 5, 5] total 30 [2018-09-18 12:11:21,772 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 12:11:21,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-18 12:11:21,774 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-18 12:11:21,775 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2018-09-18 12:11:21,775 INFO L87 Difference]: Start difference. First operand 26304 states and 28082 transitions. Second operand 28 states. Received shutdown request... [2018-09-18 12:11:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 12:11:22,575 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 12:11:22,581 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 12:11:22,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 12:11:22 BoogieIcfgContainer [2018-09-18 12:11:22,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 12:11:22,583 INFO L168 Benchmark]: Toolchain (without parser) took 224587.55 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -286.6 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-09-18 12:11:22,584 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 12:11:22,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1127.65 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. [2018-09-18 12:11:22,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 194.42 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 12:11:22,585 INFO L168 Benchmark]: Boogie Preprocessor took 463.12 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -984.4 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2018-09-18 12:11:22,586 INFO L168 Benchmark]: RCFGBuilder took 7073.52 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 260.8 MB). Peak memory consumption was 260.8 MB. Max. memory is 7.1 GB. [2018-09-18 12:11:22,587 INFO L168 Benchmark]: TraceAbstraction took 215721.94 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 320.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-09-18 12:11:22,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1127.65 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: 95.1 MB). Peak memory consumption was 95.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 194.42 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 463.12 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 834.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -984.4 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7073.52 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 260.8 MB). Peak memory consumption was 260.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215721.94 ms. Allocated memory was 2.4 GB in the beginning and 4.2 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.7 GB in the end (delta: 320.7 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 118). Cancelled while BasicCegarLoop was constructing difference of abstraction (26304states) and FLOYD_HOARE automaton (currently 5 states, 28 states before enhancement), while ReachableStatesComputation was computing reachable states (119 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 215.6s OverallTime, 15 OverallIterations, 12 TraceHistogramMax, 114.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2374 SDtfs, 37727 SDslu, 3729 SDs, 0 SdLazy, 75252 SolverSat, 9025 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41255 GetRequests, 40855 SyntacticMatches, 46 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 19.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27159occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 8110 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 69.4s InterpolantComputationTime, 32280 NumberOfCodeBlocks, 32280 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 52630 ConstructedInterpolants, 28 QuantifiedInterpolants, 279741583 SizeOfPredicates, 30 NumberOfNonLiveVariables, 26854 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 51 InterpolantComputations, 10 PerfectInterpolantSequences, 118712/135609 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_label53_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_12-11-22-604.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label53_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_12-11-22-604.csv Completed graceful shutdown