java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:12:26,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:12:26,082 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:12:26,094 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:12:26,094 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:12:26,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:12:26,097 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:12:26,099 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:12:26,101 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:12:26,101 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:12:26,102 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:12:26,103 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:12:26,104 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:12:26,105 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:12:26,106 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:12:26,107 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:12:26,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:12:26,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:12:26,112 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:12:26,114 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:12:26,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:12:26,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:12:26,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:12:26,119 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:12:26,120 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:12:26,121 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:12:26,122 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:12:26,123 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:12:26,124 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:12:26,125 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:12:26,125 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:12:26,126 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:12:26,126 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:12:26,127 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:12:26,128 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:12:26,129 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:12:26,129 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:12:26,145 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:12:26,146 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:12:26,146 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:12:26,147 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:12:26,147 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:12:26,147 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:12:26,147 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:12:26,148 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:12:26,148 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:12:26,148 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:12:26,148 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:12:26,149 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:12:26,149 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:12:26,150 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:12:26,150 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:12:26,150 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:12:26,150 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:12:26,150 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:12:26,151 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:12:26,151 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:12:26,151 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:12:26,151 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:12:26,152 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:12:26,152 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:12:26,152 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:12:26,152 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:12:26,152 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:12:26,153 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:12:26,153 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:12:26,153 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:12:26,153 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:12:26,154 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:12:26,154 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:12:26,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:12:26,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:12:26,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:12:26,229 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:12:26,229 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:12:26,230 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-09-14 17:12:26,575 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c669741/66bf3d85c72c4d36b5dd1cae3a7e0f81/FLAGac9226372 [2018-09-14 17:12:26,925 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:12:26,926 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26_true-unreach-call.c [2018-09-14 17:12:26,945 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c669741/66bf3d85c72c4d36b5dd1cae3a7e0f81/FLAGac9226372 [2018-09-14 17:12:26,968 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c669741/66bf3d85c72c4d36b5dd1cae3a7e0f81 [2018-09-14 17:12:26,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:12:26,985 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:12:26,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:12:26,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:12:26,997 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:12:26,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:12:26" (1/1) ... [2018-09-14 17:12:27,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efa186f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:26, skipping insertion in model container [2018-09-14 17:12:27,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:12:26" (1/1) ... [2018-09-14 17:12:27,016 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:12:27,635 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:12:27,654 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:12:27,838 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:12:27,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27 WrapperNode [2018-09-14 17:12:27,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:12:27,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:12:27,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:12:27,914 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:12:27,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:27,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:12:28,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:12:28,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:12:28,086 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:12:28,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... [2018-09-14 17:12:28,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:12:28,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:12:28,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:12:28,451 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:12:28,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:12:28,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:12:28,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:12:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:12:28,528 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:12:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:12:28,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:12:28,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:12:28,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:12:32,809 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:12:32,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:12:32 BoogieIcfgContainer [2018-09-14 17:12:32,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:12:32,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:12:32,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:12:32,814 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:12:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:12:26" (1/3) ... [2018-09-14 17:12:32,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be52dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:12:32, skipping insertion in model container [2018-09-14 17:12:32,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:12:27" (2/3) ... [2018-09-14 17:12:32,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7be52dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:12:32, skipping insertion in model container [2018-09-14 17:12:32,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:12:32" (3/3) ... [2018-09-14 17:12:32,818 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label26_true-unreach-call.c [2018-09-14 17:12:32,828 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:12:32,838 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:12:32,894 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:12:32,895 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:12:32,895 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:12:32,895 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:12:32,895 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:12:32,895 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:12:32,896 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:12:32,896 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:12:32,896 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:12:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-09-14 17:12:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-14 17:12:32,935 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:12:32,937 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:12:32,938 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:12:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash -242196732, now seen corresponding path program 1 times [2018-09-14 17:12:32,946 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:12:33,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:33,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:33,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:33,005 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:12:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:33,438 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:12:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:33,459 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:12:33,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:12:33,460 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:12:33,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:12:33,482 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:12:33,483 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:12:33,485 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-09-14 17:12:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:12:35,854 INFO L93 Difference]: Finished difference Result 782 states and 1372 transitions. [2018-09-14 17:12:35,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:12:35,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2018-09-14 17:12:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:12:35,878 INFO L225 Difference]: With dead ends: 782 [2018-09-14 17:12:35,878 INFO L226 Difference]: Without dead ends: 487 [2018-09-14 17:12:35,887 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:12:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2018-09-14 17:12:35,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 482. [2018-09-14 17:12:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2018-09-14 17:12:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 843 transitions. [2018-09-14 17:12:35,989 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 843 transitions. Word has length 46 [2018-09-14 17:12:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:12:35,990 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 843 transitions. [2018-09-14 17:12:35,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:12:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 843 transitions. [2018-09-14 17:12:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-14 17:12:35,998 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:12:35,998 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:12:35,998 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:12:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash -567234993, now seen corresponding path program 1 times [2018-09-14 17:12:35,999 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:12:36,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:36,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:36,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:36,001 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:12:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:36,746 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-09-14 17:12:36,985 WARN L178 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-09-14 17:12:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:37,070 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:12:37,070 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-14 17:12:37,071 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:12:37,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-14 17:12:37,073 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-14 17:12:37,073 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:12:37,073 INFO L87 Difference]: Start difference. First operand 482 states and 843 transitions. Second operand 7 states. [2018-09-14 17:12:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:12:43,500 INFO L93 Difference]: Finished difference Result 1760 states and 3239 transitions. [2018-09-14 17:12:43,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:12:43,507 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2018-09-14 17:12:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:12:43,519 INFO L225 Difference]: With dead ends: 1760 [2018-09-14 17:12:43,520 INFO L226 Difference]: Without dead ends: 1284 [2018-09-14 17:12:43,526 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:12:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2018-09-14 17:12:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1037. [2018-09-14 17:12:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1037 states. [2018-09-14 17:12:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1685 transitions. [2018-09-14 17:12:43,611 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1685 transitions. Word has length 121 [2018-09-14 17:12:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:12:43,612 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 1685 transitions. [2018-09-14 17:12:43,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-14 17:12:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1685 transitions. [2018-09-14 17:12:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-14 17:12:43,619 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:12:43,619 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:12:43,619 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:12:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2085119040, now seen corresponding path program 1 times [2018-09-14 17:12:43,620 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:12:43,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:43,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:43,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:43,621 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:12:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:43,923 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:12:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:12:44,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:12:44,082 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:12:44,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:44,098 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:12:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:44,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:12:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-14 17:12:44,489 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:12:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 78 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:12:44,742 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:12:44,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 17:12:44,743 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:12:44,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:12:44,744 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:12:44,744 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:12:44,745 INFO L87 Difference]: Start difference. First operand 1037 states and 1685 transitions. Second operand 5 states. [2018-09-14 17:12:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:12:51,545 INFO L93 Difference]: Finished difference Result 3395 states and 5619 transitions. [2018-09-14 17:12:51,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:12:51,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 194 [2018-09-14 17:12:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:12:51,562 INFO L225 Difference]: With dead ends: 3395 [2018-09-14 17:12:51,563 INFO L226 Difference]: Without dead ends: 2364 [2018-09-14 17:12:51,570 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 383 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:12:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2018-09-14 17:12:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2323. [2018-09-14 17:12:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2018-09-14 17:12:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3627 transitions. [2018-09-14 17:12:51,667 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3627 transitions. Word has length 194 [2018-09-14 17:12:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:12:51,667 INFO L480 AbstractCegarLoop]: Abstraction has 2323 states and 3627 transitions. [2018-09-14 17:12:51,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:12:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3627 transitions. [2018-09-14 17:12:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-14 17:12:51,678 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:12:51,678 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:12:51,678 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:12:51,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1893502118, now seen corresponding path program 1 times [2018-09-14 17:12:51,679 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:12:51,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:51,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:51,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:51,681 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:12:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:52,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:12:52,403 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 [2018-09-14 17:12:52,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:52,412 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:12:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:52,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:12:53,428 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 44 [2018-09-14 17:12:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 72 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:53,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:12:54,149 WARN L178 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-14 17:12:54,372 WARN L178 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2018-09-14 17:12:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:12:54,902 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:12:54,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 9] total 18 [2018-09-14 17:12:54,903 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:12:54,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:12:54,904 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:12:54,904 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:12:54,904 INFO L87 Difference]: Start difference. First operand 2323 states and 3627 transitions. Second operand 3 states. [2018-09-14 17:12:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:12:56,361 INFO L93 Difference]: Finished difference Result 6016 states and 9663 transitions. [2018-09-14 17:12:56,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:12:56,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 238 [2018-09-14 17:12:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:12:56,390 INFO L225 Difference]: With dead ends: 6016 [2018-09-14 17:12:56,391 INFO L226 Difference]: Without dead ends: 3699 [2018-09-14 17:12:56,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:12:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2018-09-14 17:12:56,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 3365. [2018-09-14 17:12:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3365 states. [2018-09-14 17:12:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 5072 transitions. [2018-09-14 17:12:56,517 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 5072 transitions. Word has length 238 [2018-09-14 17:12:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:12:56,518 INFO L480 AbstractCegarLoop]: Abstraction has 3365 states and 5072 transitions. [2018-09-14 17:12:56,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:12:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 5072 transitions. [2018-09-14 17:12:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-09-14 17:12:56,533 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:12:56,534 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:12:56,534 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:12:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash -583065927, now seen corresponding path program 1 times [2018-09-14 17:12:56,535 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:12:56,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:56,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:56,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:12:56,538 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:12:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:12:57,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:12:57,055 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:12:57,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:12:57,063 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:12:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:12:57,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:12:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-09-14 17:12:57,381 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:12:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-09-14 17:12:57,803 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:12:57,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 12 [2018-09-14 17:12:57,803 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:12:57,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:12:57,804 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:12:57,804 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-09-14 17:12:57,805 INFO L87 Difference]: Start difference. First operand 3365 states and 5072 transitions. Second operand 5 states. [2018-09-14 17:13:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:00,673 INFO L93 Difference]: Finished difference Result 9545 states and 14884 transitions. [2018-09-14 17:13:00,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-14 17:13:00,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 249 [2018-09-14 17:13:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:00,716 INFO L225 Difference]: With dead ends: 9545 [2018-09-14 17:13:00,717 INFO L226 Difference]: Without dead ends: 6186 [2018-09-14 17:13:00,753 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:13:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2018-09-14 17:13:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 5908. [2018-09-14 17:13:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5908 states. [2018-09-14 17:13:00,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 8328 transitions. [2018-09-14 17:13:00,908 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 8328 transitions. Word has length 249 [2018-09-14 17:13:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:00,908 INFO L480 AbstractCegarLoop]: Abstraction has 5908 states and 8328 transitions. [2018-09-14 17:13:00,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:13:00,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 8328 transitions. [2018-09-14 17:13:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-09-14 17:13:00,928 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:00,928 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:13:00,928 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -92905283, now seen corresponding path program 1 times [2018-09-14 17:13:00,929 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:00,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:00,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:00,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:00,930 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:13:01,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:01,219 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:13:01,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:01,227 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:01,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-09-14 17:13:01,521 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2018-09-14 17:13:01,685 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:13:01,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2018-09-14 17:13:01,685 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:13:01,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:13:01,686 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:13:01,686 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:13:01,687 INFO L87 Difference]: Start difference. First operand 5908 states and 8328 transitions. Second operand 3 states. [2018-09-14 17:13:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:03,168 INFO L93 Difference]: Finished difference Result 13415 states and 19428 transitions. [2018-09-14 17:13:03,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:13:03,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 323 [2018-09-14 17:13:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:03,206 INFO L225 Difference]: With dead ends: 13415 [2018-09-14 17:13:03,207 INFO L226 Difference]: Without dead ends: 7513 [2018-09-14 17:13:03,244 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 645 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-14 17:13:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7513 states. [2018-09-14 17:13:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7513 to 7500. [2018-09-14 17:13:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7500 states. [2018-09-14 17:13:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7500 states to 7500 states and 10221 transitions. [2018-09-14 17:13:03,424 INFO L78 Accepts]: Start accepts. Automaton has 7500 states and 10221 transitions. Word has length 323 [2018-09-14 17:13:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:03,424 INFO L480 AbstractCegarLoop]: Abstraction has 7500 states and 10221 transitions. [2018-09-14 17:13:03,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:13:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7500 states and 10221 transitions. [2018-09-14 17:13:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-09-14 17:13:03,451 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:03,452 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, 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, 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] [2018-09-14 17:13:03,452 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:03,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1931657218, now seen corresponding path program 1 times [2018-09-14 17:13:03,452 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:03,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:03,454 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:13:04,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:04,066 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 [2018-09-14 17:13:04,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:04,081 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:04,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:13:04,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:13:04,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:04,612 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 7 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 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:13:04,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:04,629 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:04,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 191 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:05,346 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-09-14 17:13:05,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:05,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 6, 5] total 8 [2018-09-14 17:13:05,895 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:05,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:13:05,896 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:13:05,896 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-14 17:13:05,897 INFO L87 Difference]: Start difference. First operand 7500 states and 10221 transitions. Second operand 6 states. [2018-09-14 17:13:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:08,927 INFO L93 Difference]: Finished difference Result 16805 states and 24351 transitions. [2018-09-14 17:13:08,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:13:08,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2018-09-14 17:13:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:08,982 INFO L225 Difference]: With dead ends: 16805 [2018-09-14 17:13:08,982 INFO L226 Difference]: Without dead ends: 9311 [2018-09-14 17:13:09,002 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 1308 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:13:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2018-09-14 17:13:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8969. [2018-09-14 17:13:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8969 states. [2018-09-14 17:13:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 11628 transitions. [2018-09-14 17:13:09,226 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 11628 transitions. Word has length 328 [2018-09-14 17:13:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:09,226 INFO L480 AbstractCegarLoop]: Abstraction has 8969 states and 11628 transitions. [2018-09-14 17:13:09,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:13:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 11628 transitions. [2018-09-14 17:13:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-09-14 17:13:09,270 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:09,271 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:13:09,271 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1298299833, now seen corresponding path program 1 times [2018-09-14 17:13:09,272 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:09,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:09,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:09,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:09,273 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-14 17:13:09,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:09,766 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:13:09,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:09,774 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:09,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 324 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-14 17:13:09,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-14 17:13:10,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:10,164 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:13:10,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:10,180 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:10,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 324 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-14 17:13:10,501 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-09-14 17:13:10,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:10,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 13 [2018-09-14 17:13:10,763 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:10,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:13:10,764 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:13:10,764 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-09-14 17:13:10,765 INFO L87 Difference]: Start difference. First operand 8969 states and 11628 transitions. Second operand 9 states. [2018-09-14 17:13:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:15,125 INFO L93 Difference]: Finished difference Result 18875 states and 25466 transitions. [2018-09-14 17:13:15,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-14 17:13:15,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 348 [2018-09-14 17:13:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:15,165 INFO L225 Difference]: With dead ends: 18875 [2018-09-14 17:13:15,165 INFO L226 Difference]: Without dead ends: 9912 [2018-09-14 17:13:15,205 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1408 GetRequests, 1385 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:13:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9912 states. [2018-09-14 17:13:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9912 to 9837. [2018-09-14 17:13:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9837 states. [2018-09-14 17:13:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 12631 transitions. [2018-09-14 17:13:15,418 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 12631 transitions. Word has length 348 [2018-09-14 17:13:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:15,418 INFO L480 AbstractCegarLoop]: Abstraction has 9837 states and 12631 transitions. [2018-09-14 17:13:15,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:13:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 12631 transitions. [2018-09-14 17:13:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-09-14 17:13:15,461 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:15,462 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, 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, 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] [2018-09-14 17:13:15,462 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:15,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1706198452, now seen corresponding path program 1 times [2018-09-14 17:13:15,463 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:15,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:15,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:15,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:15,464 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:15,946 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 17:13:16,126 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-14 17:13:16,555 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2018-09-14 17:13:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 17:13:16,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:16,799 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 [2018-09-14 17:13:16,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:16,810 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:16,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 17:13:17,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:18,015 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2018-09-14 17:13:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 17:13:18,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:18,532 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 [2018-09-14 17:13:18,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:18,548 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:18,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 17:13:19,139 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 300 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-09-14 17:13:19,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:19,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8, 5, 5] total 24 [2018-09-14 17:13:19,520 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:19,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-14 17:13:19,522 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-14 17:13:19,523 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2018-09-14 17:13:19,523 INFO L87 Difference]: Start difference. First operand 9837 states and 12631 transitions. Second operand 15 states. [2018-09-14 17:13:20,080 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2018-09-14 17:13:20,351 WARN L178 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-09-14 17:13:21,806 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 17 [2018-09-14 17:13:22,267 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-09-14 17:13:22,871 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-09-14 17:13:23,052 WARN L178 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2018-09-14 17:13:23,532 WARN L178 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2018-09-14 17:13:24,472 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-09-14 17:13:25,632 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2018-09-14 17:13:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:29,773 INFO L93 Difference]: Finished difference Result 23994 states and 32164 transitions. [2018-09-14 17:13:29,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-14 17:13:29,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 377 [2018-09-14 17:13:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:29,836 INFO L225 Difference]: With dead ends: 23994 [2018-09-14 17:13:29,836 INFO L226 Difference]: Without dead ends: 14163 [2018-09-14 17:13:29,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 1518 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=682, Invalid=2510, Unknown=0, NotChecked=0, Total=3192 [2018-09-14 17:13:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2018-09-14 17:13:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 10893. [2018-09-14 17:13:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10893 states. [2018-09-14 17:13:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 13349 transitions. [2018-09-14 17:13:30,157 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 13349 transitions. Word has length 377 [2018-09-14 17:13:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:30,158 INFO L480 AbstractCegarLoop]: Abstraction has 10893 states and 13349 transitions. [2018-09-14 17:13:30,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-14 17:13:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 13349 transitions. [2018-09-14 17:13:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2018-09-14 17:13:30,198 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:30,199 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, 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, 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] [2018-09-14 17:13:30,199 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:30,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1510440066, now seen corresponding path program 1 times [2018-09-14 17:13:30,200 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:30,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:30,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:30,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:30,201 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:13:31,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:31,005 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 [2018-09-14 17:13:31,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:31,165 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:31,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:13:31,749 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:13:31,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:31,950 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 [2018-09-14 17:13:31,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:31,965 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:32,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:13:32,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-09-14 17:13:32,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:32,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:13:32,686 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:32,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:13:32,687 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:13:32,688 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:13:32,688 INFO L87 Difference]: Start difference. First operand 10893 states and 13349 transitions. Second operand 9 states. [2018-09-14 17:13:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:36,247 INFO L93 Difference]: Finished difference Result 24123 states and 30261 transitions. [2018-09-14 17:13:36,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:13:36,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 433 [2018-09-14 17:13:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:36,289 INFO L225 Difference]: With dead ends: 24123 [2018-09-14 17:13:36,290 INFO L226 Difference]: Without dead ends: 13236 [2018-09-14 17:13:36,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1727 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:13:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13236 states. [2018-09-14 17:13:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13236 to 13081. [2018-09-14 17:13:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13081 states. [2018-09-14 17:13:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13081 states to 13081 states and 15673 transitions. [2018-09-14 17:13:36,557 INFO L78 Accepts]: Start accepts. Automaton has 13081 states and 15673 transitions. Word has length 433 [2018-09-14 17:13:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:36,558 INFO L480 AbstractCegarLoop]: Abstraction has 13081 states and 15673 transitions. [2018-09-14 17:13:36,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:13:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13081 states and 15673 transitions. [2018-09-14 17:13:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2018-09-14 17:13:36,592 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:36,592 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:13:36,593 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1671852664, now seen corresponding path program 1 times [2018-09-14 17:13:36,593 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:36,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:36,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:36,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:36,594 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2018-09-14 17:13:36,971 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:13:36,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:13:36,972 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:13:36,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:13:36,972 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:13:36,972 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:13:36,973 INFO L87 Difference]: Start difference. First operand 13081 states and 15673 transitions. Second operand 3 states. [2018-09-14 17:13:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:39,719 INFO L93 Difference]: Finished difference Result 29913 states and 36564 transitions. [2018-09-14 17:13:39,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:13:39,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 462 [2018-09-14 17:13:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:39,758 INFO L225 Difference]: With dead ends: 29913 [2018-09-14 17:13:39,758 INFO L226 Difference]: Without dead ends: 15930 [2018-09-14 17:13:39,792 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:13:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15930 states. [2018-09-14 17:13:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15930 to 15879. [2018-09-14 17:13:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15879 states. [2018-09-14 17:13:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15879 states to 15879 states and 18589 transitions. [2018-09-14 17:13:40,058 INFO L78 Accepts]: Start accepts. Automaton has 15879 states and 18589 transitions. Word has length 462 [2018-09-14 17:13:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:40,059 INFO L480 AbstractCegarLoop]: Abstraction has 15879 states and 18589 transitions. [2018-09-14 17:13:40,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:13:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15879 states and 18589 transitions. [2018-09-14 17:13:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2018-09-14 17:13:40,091 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:40,091 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-14 17:13:40,091 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1104413609, now seen corresponding path program 1 times [2018-09-14 17:13:40,092 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:40,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:40,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:40,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:40,093 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 167 proven. 394 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2018-09-14 17:13:40,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:40,679 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 [2018-09-14 17:13:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:40,693 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:40,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:41,099 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2018-09-14 17:13:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-09-14 17:13:41,476 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2018-09-14 17:13:41,637 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:13:41,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2018-09-14 17:13:41,637 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:13:41,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:13:41,638 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:13:41,638 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:13:41,638 INFO L87 Difference]: Start difference. First operand 15879 states and 18589 transitions. Second operand 3 states. [2018-09-14 17:13:43,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:13:43,785 INFO L93 Difference]: Finished difference Result 36509 states and 43817 transitions. [2018-09-14 17:13:43,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:13:43,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 526 [2018-09-14 17:13:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:13:43,840 INFO L225 Difference]: With dead ends: 36509 [2018-09-14 17:13:43,840 INFO L226 Difference]: Without dead ends: 20825 [2018-09-14 17:13:43,878 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:13:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20825 states. [2018-09-14 17:13:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20825 to 20825. [2018-09-14 17:13:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20825 states. [2018-09-14 17:13:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20825 states to 20825 states and 24665 transitions. [2018-09-14 17:13:44,256 INFO L78 Accepts]: Start accepts. Automaton has 20825 states and 24665 transitions. Word has length 526 [2018-09-14 17:13:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:13:44,257 INFO L480 AbstractCegarLoop]: Abstraction has 20825 states and 24665 transitions. [2018-09-14 17:13:44,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:13:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 20825 states and 24665 transitions. [2018-09-14 17:13:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2018-09-14 17:13:44,311 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:13:44,311 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-14 17:13:44,312 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:13:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash 2022942990, now seen corresponding path program 1 times [2018-09-14 17:13:44,312 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:13:44,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:44,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:44,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:13:44,313 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:13:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 167 proven. 406 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-09-14 17:13:45,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:45,138 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:13:45,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:45,147 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:45,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 497 proven. 107 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-14 17:13:49,651 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:52,053 WARN L178 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-09-14 17:13:52,692 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 17:13:52,794 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-09-14 17:13:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 494 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:53,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:13:53,649 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:13:53,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:13:53,665 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:13:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:13:54,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:13:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 497 proven. 107 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-09-14 17:13:58,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:13:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 494 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:13:59,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:13:59,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11, 8, 11] total 23 [2018-09-14 17:13:59,727 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:13:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 17:13:59,730 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 17:13:59,730 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=377, Unknown=4, NotChecked=0, Total=506 [2018-09-14 17:13:59,731 INFO L87 Difference]: Start difference. First operand 20825 states and 24665 transitions. Second operand 11 states. [2018-09-14 17:14:06,398 WARN L178 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 17 Received shutdown request... [2018-09-14 17:16:42,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-14 17:16:42,994 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:16:43,000 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:16:43,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:16:43 BoogieIcfgContainer [2018-09-14 17:16:43,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:16:43,002 INFO L168 Benchmark]: Toolchain (without parser) took 256019.58 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 957.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,003 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:16:43,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 926.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 172.18 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,005 INFO L168 Benchmark]: Boogie Preprocessor took 363.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 812.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,006 INFO L168 Benchmark]: RCFGBuilder took 4359.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 172.0 MB). Peak memory consumption was 172.0 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,006 INFO L168 Benchmark]: TraceAbstraction took 250190.28 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -375.3 MB). Peak memory consumption was 813.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:16:43,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 926.54 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 172.18 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 363.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 812.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -936.5 MB). Peak memory consumption was 49.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4359.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 172.0 MB). Peak memory consumption was 172.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 250190.28 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 2.1 GB in the beginning and 2.5 GB in the end (delta: -375.3 MB). Peak memory consumption was 813.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 123]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 123). Cancelled while BasicCegarLoop was constructing difference of abstraction (20825states) and FLOYD_HOARE automaton (currently 26 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (57826 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 250.1s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 211.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2742 SDtfs, 13981 SDslu, 2610 SDs, 0 SdLazy, 24691 SolverSat, 6070 SolverUnsat, 81 SolverUnknown, 0 SolverNotchecked, 185.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11338 GetRequests, 11104 SyntacticMatches, 37 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 36.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20825occurred in iteration=12, 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: 2.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 4811 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 30.7s InterpolantComputationTime, 9737 NumberOfCodeBlocks, 9737 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 15256 ConstructedInterpolants, 313 QuantifiedInterpolants, 21221730 SizeOfPredicates, 25 NumberOfNonLiveVariables, 9300 ConjunctsInSsa, 139 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 14956/17255 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-16-43-028.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem11_label26_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-16-43-028.csv Completed graceful shutdown