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/Problem15_label16_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 11:54:16,701 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 11:54:16,703 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 11:54:16,717 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 11:54:16,717 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 11:54:16,718 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 11:54:16,719 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 11:54:16,721 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 11:54:16,722 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 11:54:16,723 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 11:54:16,724 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 11:54:16,725 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 11:54:16,726 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 11:54:16,726 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 11:54:16,728 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 11:54:16,729 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 11:54:16,729 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 11:54:16,731 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 11:54:16,733 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 11:54:16,735 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 11:54:16,736 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 11:54:16,738 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 11:54:16,741 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 11:54:16,741 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 11:54:16,741 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 11:54:16,742 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 11:54:16,743 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 11:54:16,744 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 11:54:16,745 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 11:54:16,746 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 11:54:16,747 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 11:54:16,747 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-18 11:54:16,748 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-18 11:54:16,748 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-18 11:54:16,749 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-18 11:54:16,750 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-18 11:54:16,750 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 11:54:16,768 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 11:54:16,769 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 11:54:16,770 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 11:54:16,770 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 11:54:16,770 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 11:54:16,770 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 11:54:16,770 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 11:54:16,771 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 11:54:16,771 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 11:54:16,771 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 11:54:16,771 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 11:54:16,771 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 11:54:16,772 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 11:54:16,772 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 11:54:16,772 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 11:54:16,773 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 11:54:16,773 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 11:54:16,773 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 11:54:16,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 11:54:16,773 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 11:54:16,774 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 11:54:16,774 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 11:54:16,774 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 11:54:16,774 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 11:54:16,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:54:16,775 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 11:54:16,775 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 11:54:16,775 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 11:54:16,775 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 11:54:16,775 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 11:54:16,776 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 11:54:16,776 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 11:54:16,776 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 11:54:16,776 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 11:54:16,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 11:54:16,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 11:54:16,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 11:54:16,848 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 11:54:16,848 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 11:54:16,849 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label16_true-unreach-call.c [2018-09-18 11:54:17,220 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135dfaebc/c2aa05d970454a34ad825a08f3347a69/FLAG19a9f97e6 [2018-09-18 11:54:17,658 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 11:54:17,659 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label16_true-unreach-call.c [2018-09-18 11:54:17,678 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135dfaebc/c2aa05d970454a34ad825a08f3347a69/FLAG19a9f97e6 [2018-09-18 11:54:17,695 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/135dfaebc/c2aa05d970454a34ad825a08f3347a69 [2018-09-18 11:54:17,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 11:54:17,710 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 11:54:17,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 11:54:17,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 11:54:17,723 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 11:54:17,725 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:54:17" (1/1) ... [2018-09-18 11:54:17,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1630209e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:17, skipping insertion in model container [2018-09-18 11:54:17,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 11:54:17" (1/1) ... [2018-09-18 11:54:17,742 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 11:54:18,605 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:54:18,623 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 11:54:18,883 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 11:54:19,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19 WrapperNode [2018-09-18 11:54:19,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 11:54:19,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 11:54:19,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 11:54:19,017 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 11:54:19,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 11:54:19,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 11:54:19,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 11:54:19,297 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 11:54:19,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... [2018-09-18 11:54:19,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 11:54:19,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 11:54:19,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 11:54:19,897 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 11:54:19,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 11:54:19,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 11:54:19,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 11:54:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-18 11:54:19,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-18 11:54:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-18 11:54:19,972 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-18 11:54:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 11:54:19,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 11:54:19,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 11:54:19,973 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 11:54:29,649 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 11:54:29,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:54:29 BoogieIcfgContainer [2018-09-18 11:54:29,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 11:54:29,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 11:54:29,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 11:54:29,655 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 11:54:29,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 11:54:17" (1/3) ... [2018-09-18 11:54:29,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e995abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:54:29, skipping insertion in model container [2018-09-18 11:54:29,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 11:54:19" (2/3) ... [2018-09-18 11:54:29,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e995abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 11:54:29, skipping insertion in model container [2018-09-18 11:54:29,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 11:54:29" (3/3) ... [2018-09-18 11:54:29,659 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label16_true-unreach-call.c [2018-09-18 11:54:29,669 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 11:54:29,680 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 11:54:29,744 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 11:54:29,745 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 11:54:29,745 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 11:54:29,745 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 11:54:29,745 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 11:54:29,746 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 11:54:29,746 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 11:54:29,746 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 11:54:29,746 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 11:54:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-09-18 11:54:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-18 11:54:29,799 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:54:29,800 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:54:29,802 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:54:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 539142097, now seen corresponding path program 1 times [2018-09-18 11:54:29,809 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:54:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:29,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:29,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:29,862 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:54:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:30,402 WARN L178 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:54:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:54:30,444 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:54:30,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:54:30,445 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:54:30,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:54:30,467 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:54:30,467 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:54:30,470 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 3 states. [2018-09-18 11:54:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:54:36,271 INFO L93 Difference]: Finished difference Result 1193 states and 2149 transitions. [2018-09-18 11:54:36,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:54:36,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2018-09-18 11:54:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:54:36,301 INFO L225 Difference]: With dead ends: 1193 [2018-09-18 11:54:36,301 INFO L226 Difference]: Without dead ends: 753 [2018-09-18 11:54:36,312 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:54:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2018-09-18 11:54:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2018-09-18 11:54:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2018-09-18 11:54:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1315 transitions. [2018-09-18 11:54:36,417 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1315 transitions. Word has length 69 [2018-09-18 11:54:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:54:36,418 INFO L480 AbstractCegarLoop]: Abstraction has 753 states and 1315 transitions. [2018-09-18 11:54:36,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:54:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1315 transitions. [2018-09-18 11:54:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-18 11:54:36,428 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:54:36,429 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:54:36,429 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:54:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1189160704, now seen corresponding path program 1 times [2018-09-18 11:54:36,430 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:54:36,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:36,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:36,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:36,432 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:54:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:54:36,682 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:54:36,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 11:54:36,683 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:54:36,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:54:36,685 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:54:36,686 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:54:36,686 INFO L87 Difference]: Start difference. First operand 753 states and 1315 transitions. Second operand 5 states. [2018-09-18 11:54:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:54:53,168 INFO L93 Difference]: Finished difference Result 2822 states and 5078 transitions. [2018-09-18 11:54:53,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:54:53,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2018-09-18 11:54:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:54:53,185 INFO L225 Difference]: With dead ends: 2822 [2018-09-18 11:54:53,186 INFO L226 Difference]: Without dead ends: 2075 [2018-09-18 11:54:53,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-18 11:54:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2018-09-18 11:54:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2048. [2018-09-18 11:54:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2018-09-18 11:54:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3212 transitions. [2018-09-18 11:54:53,292 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3212 transitions. Word has length 149 [2018-09-18 11:54:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:54:53,293 INFO L480 AbstractCegarLoop]: Abstraction has 2048 states and 3212 transitions. [2018-09-18 11:54:53,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:54:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3212 transitions. [2018-09-18 11:54:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-18 11:54:53,303 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:54:53,303 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:54:53,304 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:54:53,304 INFO L82 PathProgramCache]: Analyzing trace with hash -719504888, now seen corresponding path program 1 times [2018-09-18 11:54:53,304 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:54:53,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:53,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:54:53,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:54:53,307 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:54:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:54:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:54:53,872 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:54:53,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 11:54:53,873 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:54:53,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 11:54:53,874 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 11:54:53,874 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 11:54:53,874 INFO L87 Difference]: Start difference. First operand 2048 states and 3212 transitions. Second operand 6 states. [2018-09-18 11:55:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:07,850 INFO L93 Difference]: Finished difference Result 6278 states and 10295 transitions. [2018-09-18 11:55:07,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:55:07,851 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2018-09-18 11:55:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:07,878 INFO L225 Difference]: With dead ends: 6278 [2018-09-18 11:55:07,878 INFO L226 Difference]: Without dead ends: 4236 [2018-09-18 11:55:07,896 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:55:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2018-09-18 11:55:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 4178. [2018-09-18 11:55:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4178 states. [2018-09-18 11:55:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 6127 transitions. [2018-09-18 11:55:08,018 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 6127 transitions. Word has length 153 [2018-09-18 11:55:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:08,019 INFO L480 AbstractCegarLoop]: Abstraction has 4178 states and 6127 transitions. [2018-09-18 11:55:08,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 11:55:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 6127 transitions. [2018-09-18 11:55:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-18 11:55:08,027 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:08,027 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:08,028 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:08,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1625872252, now seen corresponding path program 1 times [2018-09-18 11:55:08,028 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:08,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:08,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:08,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:08,030 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 125 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-18 11:55:08,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:08,412 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:08,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:08,422 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:08,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-18 11:55:08,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-09-18 11:55:09,540 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:55:09,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2018-09-18 11:55:09,541 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:55:09,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:55:09,542 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:55:09,543 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-18 11:55:09,543 INFO L87 Difference]: Start difference. First operand 4178 states and 6127 transitions. Second operand 5 states. [2018-09-18 11:55:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:15,961 INFO L93 Difference]: Finished difference Result 10210 states and 15269 transitions. [2018-09-18 11:55:15,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 11:55:15,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2018-09-18 11:55:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:15,991 INFO L225 Difference]: With dead ends: 10210 [2018-09-18 11:55:15,991 INFO L226 Difference]: Without dead ends: 6038 [2018-09-18 11:55:16,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 444 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-18 11:55:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2018-09-18 11:55:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 4915. [2018-09-18 11:55:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4915 states. [2018-09-18 11:55:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 6574 transitions. [2018-09-18 11:55:16,132 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 6574 transitions. Word has length 223 [2018-09-18 11:55:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:16,133 INFO L480 AbstractCegarLoop]: Abstraction has 4915 states and 6574 transitions. [2018-09-18 11:55:16,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:55:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 6574 transitions. [2018-09-18 11:55:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-18 11:55:16,142 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:16,143 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:16,143 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash -528021637, now seen corresponding path program 1 times [2018-09-18 11:55:16,143 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:16,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:16,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:16,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:16,146 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:55:16,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:16,696 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:16,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:16,706 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:16,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:55:17,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:17,171 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-09-18 11:55:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:55:17,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:17,616 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:55:17,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:17,641 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:17,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:55:17,975 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 202 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 11:55:18,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:55:18,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-09-18 11:55:18,089 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:55:18,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:55:18,090 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:55:18,090 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:55:18,091 INFO L87 Difference]: Start difference. First operand 4915 states and 6574 transitions. Second operand 9 states. [2018-09-18 11:55:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:26,608 INFO L93 Difference]: Finished difference Result 14832 states and 21481 transitions. [2018-09-18 11:55:26,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 11:55:26,610 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 230 [2018-09-18 11:55:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:26,672 INFO L225 Difference]: With dead ends: 14832 [2018-09-18 11:55:26,672 INFO L226 Difference]: Without dead ends: 9923 [2018-09-18 11:55:26,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 919 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2018-09-18 11:55:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9923 states. [2018-09-18 11:55:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9923 to 9759. [2018-09-18 11:55:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9759 states. [2018-09-18 11:55:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9759 states to 9759 states and 12046 transitions. [2018-09-18 11:55:27,022 INFO L78 Accepts]: Start accepts. Automaton has 9759 states and 12046 transitions. Word has length 230 [2018-09-18 11:55:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:27,022 INFO L480 AbstractCegarLoop]: Abstraction has 9759 states and 12046 transitions. [2018-09-18 11:55:27,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:55:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 9759 states and 12046 transitions. [2018-09-18 11:55:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-18 11:55:27,042 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:27,043 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:27,043 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1411413435, now seen corresponding path program 1 times [2018-09-18 11:55:27,043 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:27,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:27,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:27,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:27,045 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:27,312 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-18 11:55:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:55:27,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:27,712 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:27,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:27,730 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:27,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 11:55:28,241 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 124 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-18 11:55:28,574 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:55:28,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-18 11:55:28,575 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:55:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:55:28,576 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:55:28,576 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:55:28,576 INFO L87 Difference]: Start difference. First operand 9759 states and 12046 transitions. Second operand 5 states. [2018-09-18 11:55:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:34,477 INFO L93 Difference]: Finished difference Result 21486 states and 27313 transitions. [2018-09-18 11:55:34,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-18 11:55:34,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2018-09-18 11:55:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:34,556 INFO L225 Difference]: With dead ends: 21486 [2018-09-18 11:55:34,556 INFO L226 Difference]: Without dead ends: 11733 [2018-09-18 11:55:34,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 467 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:55:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11733 states. [2018-09-18 11:55:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11733 to 11688. [2018-09-18 11:55:34,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11688 states. [2018-09-18 11:55:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 14399 transitions. [2018-09-18 11:55:34,901 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 14399 transitions. Word has length 236 [2018-09-18 11:55:34,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:34,901 INFO L480 AbstractCegarLoop]: Abstraction has 11688 states and 14399 transitions. [2018-09-18 11:55:34,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:55:34,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 14399 transitions. [2018-09-18 11:55:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2018-09-18 11:55:34,942 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:34,943 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:34,943 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1962462173, now seen corresponding path program 1 times [2018-09-18 11:55:34,944 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:34,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:34,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:34,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:34,945 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 274 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-09-18 11:55:35,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:35,664 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:35,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:35,680 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:35,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:36,060 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 3 [2018-09-18 11:55:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2018-09-18 11:55:36,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2018-09-18 11:55:36,676 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:55:36,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 7 [2018-09-18 11:55:36,676 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:55:36,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:55:36,677 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:55:36,677 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:55:36,678 INFO L87 Difference]: Start difference. First operand 11688 states and 14399 transitions. Second operand 3 states. [2018-09-18 11:55:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:40,837 INFO L93 Difference]: Finished difference Result 27858 states and 35280 transitions. [2018-09-18 11:55:40,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:55:40,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 437 [2018-09-18 11:55:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:40,913 INFO L225 Difference]: With dead ends: 27858 [2018-09-18 11:55:40,914 INFO L226 Difference]: Without dead ends: 16181 [2018-09-18 11:55:40,967 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 874 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-09-18 11:55:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16181 states. [2018-09-18 11:55:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16181 to 16168. [2018-09-18 11:55:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16168 states. [2018-09-18 11:55:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16168 states to 16168 states and 20509 transitions. [2018-09-18 11:55:41,334 INFO L78 Accepts]: Start accepts. Automaton has 16168 states and 20509 transitions. Word has length 437 [2018-09-18 11:55:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:41,335 INFO L480 AbstractCegarLoop]: Abstraction has 16168 states and 20509 transitions. [2018-09-18 11:55:41,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:55:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 16168 states and 20509 transitions. [2018-09-18 11:55:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-09-18 11:55:41,388 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:41,388 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:41,389 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2063102165, now seen corresponding path program 1 times [2018-09-18 11:55:41,389 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:41,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:41,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:41,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:41,390 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-18 11:55:42,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:42,104 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:55:42,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:42,121 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:42,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 11:55:42,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-18 11:55:42,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:55:42,893 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:55:42,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:42,908 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:55:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:43,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:55:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 372 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 11:55:43,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:55:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-09-18 11:55:43,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:55:43,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:55:43,564 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:55:43,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:55:43,566 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:55:43,566 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:55:43,566 INFO L87 Difference]: Start difference. First operand 16168 states and 20509 transitions. Second operand 9 states. [2018-09-18 11:55:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:55:54,366 INFO L93 Difference]: Finished difference Result 38644 states and 55206 transitions. [2018-09-18 11:55:54,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 11:55:54,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 440 [2018-09-18 11:55:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:55:54,507 INFO L225 Difference]: With dead ends: 38644 [2018-09-18 11:55:54,507 INFO L226 Difference]: Without dead ends: 22487 [2018-09-18 11:55:54,645 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1786 GetRequests, 1760 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2018-09-18 11:55:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22487 states. [2018-09-18 11:55:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22487 to 22442. [2018-09-18 11:55:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22442 states. [2018-09-18 11:55:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22442 states to 22442 states and 30840 transitions. [2018-09-18 11:55:55,419 INFO L78 Accepts]: Start accepts. Automaton has 22442 states and 30840 transitions. Word has length 440 [2018-09-18 11:55:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:55:55,419 INFO L480 AbstractCegarLoop]: Abstraction has 22442 states and 30840 transitions. [2018-09-18 11:55:55,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:55:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 22442 states and 30840 transitions. [2018-09-18 11:55:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2018-09-18 11:55:55,473 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:55:55,473 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:55:55,474 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:55:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1040952031, now seen corresponding path program 1 times [2018-09-18 11:55:55,474 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:55:55,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:55,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:55:55,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:55:55,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:55:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:55:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-09-18 11:55:55,897 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:55:55,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:55:55,898 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:55:55,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:55:55,899 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:55:55,899 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:55:55,899 INFO L87 Difference]: Start difference. First operand 22442 states and 30840 transitions. Second operand 3 states. [2018-09-18 11:56:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:56:00,229 INFO L93 Difference]: Finished difference Result 45205 states and 62846 transitions. [2018-09-18 11:56:00,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:56:00,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 511 [2018-09-18 11:56:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:56:00,391 INFO L225 Difference]: With dead ends: 45205 [2018-09-18 11:56:00,391 INFO L226 Difference]: Without dead ends: 22774 [2018-09-18 11:56:00,548 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:56:00,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2018-09-18 11:56:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22441. [2018-09-18 11:56:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22441 states. [2018-09-18 11:56:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22441 states to 22441 states and 30835 transitions. [2018-09-18 11:56:01,208 INFO L78 Accepts]: Start accepts. Automaton has 22441 states and 30835 transitions. Word has length 511 [2018-09-18 11:56:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:56:01,209 INFO L480 AbstractCegarLoop]: Abstraction has 22441 states and 30835 transitions. [2018-09-18 11:56:01,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:56:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22441 states and 30835 transitions. [2018-09-18 11:56:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-09-18 11:56:01,244 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:56:01,245 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:56:01,245 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:56:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -307916195, now seen corresponding path program 1 times [2018-09-18 11:56:01,246 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:56:01,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:01,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:01,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:01,247 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:56:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:01,739 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2018-09-18 11:56:01,740 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:56:01,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 11:56:01,740 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:56:01,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:56:01,741 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:56:01,741 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:56:01,745 INFO L87 Difference]: Start difference. First operand 22441 states and 30835 transitions. Second operand 3 states. [2018-09-18 11:56:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:56:07,078 INFO L93 Difference]: Finished difference Result 49061 states and 69439 transitions. [2018-09-18 11:56:07,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:56:07,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 528 [2018-09-18 11:56:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:56:07,238 INFO L225 Difference]: With dead ends: 49061 [2018-09-18 11:56:07,239 INFO L226 Difference]: Without dead ends: 26631 [2018-09-18 11:56:07,427 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 11:56:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26631 states. [2018-09-18 11:56:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26631 to 26631. [2018-09-18 11:56:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26631 states. [2018-09-18 11:56:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26631 states to 26631 states and 36943 transitions. [2018-09-18 11:56:08,230 INFO L78 Accepts]: Start accepts. Automaton has 26631 states and 36943 transitions. Word has length 528 [2018-09-18 11:56:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:56:08,231 INFO L480 AbstractCegarLoop]: Abstraction has 26631 states and 36943 transitions. [2018-09-18 11:56:08,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:56:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26631 states and 36943 transitions. [2018-09-18 11:56:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2018-09-18 11:56:08,255 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:56:08,256 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:56:08,256 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:56:08,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1967260443, now seen corresponding path program 1 times [2018-09-18 11:56:08,256 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:56:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:08,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:08,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:08,258 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:56:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:08,915 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-09-18 11:56:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 188 proven. 15 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-09-18 11:56:09,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:09,131 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:56:09,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:09,139 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:09,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:10,281 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-18 11:56:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-18 11:56:10,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 186 proven. 199 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:56:12,080 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-18 11:56:12,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2018-09-18 11:56:12,081 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:56:12,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:56:12,082 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:56:12,082 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:56:12,082 INFO L87 Difference]: Start difference. First operand 26631 states and 36943 transitions. Second operand 5 states. [2018-09-18 11:56:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:56:19,246 INFO L93 Difference]: Finished difference Result 53524 states and 70314 transitions. [2018-09-18 11:56:19,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-18 11:56:19,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 532 [2018-09-18 11:56:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:56:19,322 INFO L225 Difference]: With dead ends: 53524 [2018-09-18 11:56:19,322 INFO L226 Difference]: Without dead ends: 26904 [2018-09-18 11:56:19,433 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1060 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2018-09-18 11:56:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26904 states. [2018-09-18 11:56:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26904 to 25930. [2018-09-18 11:56:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25930 states. [2018-09-18 11:56:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25930 states to 25930 states and 32030 transitions. [2018-09-18 11:56:19,899 INFO L78 Accepts]: Start accepts. Automaton has 25930 states and 32030 transitions. Word has length 532 [2018-09-18 11:56:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:56:19,899 INFO L480 AbstractCegarLoop]: Abstraction has 25930 states and 32030 transitions. [2018-09-18 11:56:19,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:56:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 25930 states and 32030 transitions. [2018-09-18 11:56:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2018-09-18 11:56:19,911 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:56:19,912 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:56:19,912 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:56:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2074824608, now seen corresponding path program 1 times [2018-09-18 11:56:19,912 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:56:19,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:19,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:19,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:19,913 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:56:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 389 proven. 60 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-09-18 11:56:20,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:20,374 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:56:20,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:20,382 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:20,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2018-09-18 11:56:20,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2018-09-18 11:56:20,935 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:56:20,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 5 [2018-09-18 11:56:20,935 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:56:20,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:56:20,936 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:56:20,936 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:56:20,937 INFO L87 Difference]: Start difference. First operand 25930 states and 32030 transitions. Second operand 3 states. [2018-09-18 11:56:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:56:23,663 INFO L93 Difference]: Finished difference Result 54370 states and 67226 transitions. [2018-09-18 11:56:23,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:56:23,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 535 [2018-09-18 11:56:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:56:23,743 INFO L225 Difference]: With dead ends: 54370 [2018-09-18 11:56:23,743 INFO L226 Difference]: Without dead ends: 28754 [2018-09-18 11:56:23,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:56:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28754 states. [2018-09-18 11:56:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28754 to 28441. [2018-09-18 11:56:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28441 states. [2018-09-18 11:56:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28441 states to 28441 states and 34975 transitions. [2018-09-18 11:56:24,310 INFO L78 Accepts]: Start accepts. Automaton has 28441 states and 34975 transitions. Word has length 535 [2018-09-18 11:56:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:56:24,311 INFO L480 AbstractCegarLoop]: Abstraction has 28441 states and 34975 transitions. [2018-09-18 11:56:24,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:56:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 28441 states and 34975 transitions. [2018-09-18 11:56:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-18 11:56:24,321 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:56:24,321 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:56:24,321 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:56:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash 29031879, now seen corresponding path program 1 times [2018-09-18 11:56:24,322 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:56:24,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:24,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:24,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:24,324 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:56:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 314 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:56:25,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:25,084 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:56:25,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:25,096 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:25,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 414 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 11:56:25,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 314 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:56:25,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:25,779 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:56:25,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:25,993 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:26,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 414 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-09-18 11:56:26,514 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 314 proven. 83 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-09-18 11:56:26,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:56:26,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-18 11:56:26,765 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:56:26,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-18 11:56:26,767 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-18 11:56:26,767 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-18 11:56:26,767 INFO L87 Difference]: Start difference. First operand 28441 states and 34975 transitions. Second operand 9 states. [2018-09-18 11:56:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:56:34,230 INFO L93 Difference]: Finished difference Result 56426 states and 71239 transitions. [2018-09-18 11:56:34,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-18 11:56:34,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 567 [2018-09-18 11:56:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:56:34,327 INFO L225 Difference]: With dead ends: 56426 [2018-09-18 11:56:34,328 INFO L226 Difference]: Without dead ends: 28299 [2018-09-18 11:56:34,409 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2298 GetRequests, 2270 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2018-09-18 11:56:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28299 states. [2018-09-18 11:56:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28299 to 27975. [2018-09-18 11:56:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27975 states. [2018-09-18 11:56:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27975 states to 27975 states and 33494 transitions. [2018-09-18 11:56:35,010 INFO L78 Accepts]: Start accepts. Automaton has 27975 states and 33494 transitions. Word has length 567 [2018-09-18 11:56:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:56:35,011 INFO L480 AbstractCegarLoop]: Abstraction has 27975 states and 33494 transitions. [2018-09-18 11:56:35,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-18 11:56:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 27975 states and 33494 transitions. [2018-09-18 11:56:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-09-18 11:56:35,029 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:56:35,030 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:56:35,030 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:56:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -503860241, now seen corresponding path program 1 times [2018-09-18 11:56:35,031 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:56:35,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:35,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:35,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:56:35,032 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:56:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 352 proven. 371 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:56:36,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:36,775 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:56:36,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:36,783 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:36,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 566 proven. 41 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-18 11:56:37,727 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 263 proven. 460 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:56:38,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:56:38,981 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:56:38,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:56:38,998 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:56:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:56:39,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:56:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 516 proven. 41 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-18 11:56:40,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:56:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 263 proven. 460 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:56:41,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:56:41,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 8, 9] total 23 [2018-09-18 11:56:41,505 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:56:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 11:56:41,507 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 11:56:41,507 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:56:41,507 INFO L87 Difference]: Start difference. First operand 27975 states and 33494 transitions. Second operand 13 states. [2018-09-18 11:57:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:57:00,174 INFO L93 Difference]: Finished difference Result 58706 states and 70282 transitions. [2018-09-18 11:57:00,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-18 11:57:00,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 628 [2018-09-18 11:57:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:57:00,249 INFO L225 Difference]: With dead ends: 58706 [2018-09-18 11:57:00,249 INFO L226 Difference]: Without dead ends: 29549 [2018-09-18 11:57:00,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2567 GetRequests, 2521 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2018-09-18 11:57:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29549 states. [2018-09-18 11:57:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29549 to 29170. [2018-09-18 11:57:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29170 states. [2018-09-18 11:57:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29170 states to 29170 states and 34739 transitions. [2018-09-18 11:57:00,867 INFO L78 Accepts]: Start accepts. Automaton has 29170 states and 34739 transitions. Word has length 628 [2018-09-18 11:57:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:57:00,867 INFO L480 AbstractCegarLoop]: Abstraction has 29170 states and 34739 transitions. [2018-09-18 11:57:00,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 11:57:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29170 states and 34739 transitions. [2018-09-18 11:57:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2018-09-18 11:57:00,878 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:57:00,879 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:57:00,879 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:57:00,879 INFO L82 PathProgramCache]: Analyzing trace with hash 202387161, now seen corresponding path program 1 times [2018-09-18 11:57:00,879 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:57:00,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:00,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:00,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:00,881 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:57:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:01,574 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-09-18 11:57:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 260 proven. 341 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-18 11:57:02,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:57:02,652 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:57:02,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:02,661 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:57:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:02,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:57:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-09-18 11:57:03,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:57:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2018-09-18 11:57:03,732 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-18 11:57:03,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [10] total 12 [2018-09-18 11:57:03,733 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:57:03,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 11:57:03,733 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 11:57:03,733 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:57:03,734 INFO L87 Difference]: Start difference. First operand 29170 states and 34739 transitions. Second operand 3 states. [2018-09-18 11:57:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:57:08,393 INFO L93 Difference]: Finished difference Result 61432 states and 73110 transitions. [2018-09-18 11:57:08,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 11:57:08,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 631 [2018-09-18 11:57:08,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:57:08,473 INFO L225 Difference]: With dead ends: 61432 [2018-09-18 11:57:08,473 INFO L226 Difference]: Without dead ends: 32576 [2018-09-18 11:57:08,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1274 GetRequests, 1264 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-09-18 11:57:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32576 states. [2018-09-18 11:57:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32576 to 32210. [2018-09-18 11:57:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32210 states. [2018-09-18 11:57:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32210 states to 32210 states and 38053 transitions. [2018-09-18 11:57:09,078 INFO L78 Accepts]: Start accepts. Automaton has 32210 states and 38053 transitions. Word has length 631 [2018-09-18 11:57:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:57:09,079 INFO L480 AbstractCegarLoop]: Abstraction has 32210 states and 38053 transitions. [2018-09-18 11:57:09,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 11:57:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 32210 states and 38053 transitions. [2018-09-18 11:57:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2018-09-18 11:57:09,096 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:57:09,097 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:57:09,097 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:57:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash 994274184, now seen corresponding path program 1 times [2018-09-18 11:57:09,098 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:57:09,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:09,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:09,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:09,099 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:57:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-09-18 11:57:09,719 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:57:09,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-18 11:57:09,719 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:57:09,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-18 11:57:09,720 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-18 11:57:09,720 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:57:09,720 INFO L87 Difference]: Start difference. First operand 32210 states and 38053 transitions. Second operand 4 states. [2018-09-18 11:57:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:57:18,275 INFO L93 Difference]: Finished difference Result 98087 states and 116507 transitions. [2018-09-18 11:57:18,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-18 11:57:18,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 680 [2018-09-18 11:57:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:57:18,472 INFO L225 Difference]: With dead ends: 98087 [2018-09-18 11:57:18,472 INFO L226 Difference]: Without dead ends: 66191 [2018-09-18 11:57:18,605 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-18 11:57:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66191 states. [2018-09-18 11:57:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66191 to 60145. [2018-09-18 11:57:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60145 states. [2018-09-18 11:57:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60145 states to 60145 states and 70218 transitions. [2018-09-18 11:57:20,082 INFO L78 Accepts]: Start accepts. Automaton has 60145 states and 70218 transitions. Word has length 680 [2018-09-18 11:57:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:57:20,083 INFO L480 AbstractCegarLoop]: Abstraction has 60145 states and 70218 transitions. [2018-09-18 11:57:20,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-18 11:57:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60145 states and 70218 transitions. [2018-09-18 11:57:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2018-09-18 11:57:20,105 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:57:20,106 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-18 11:57:20,106 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:57:20,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1213114529, now seen corresponding path program 1 times [2018-09-18 11:57:20,107 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:57:20,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:20,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:20,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:20,108 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:57:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:20,650 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-09-18 11:57:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2018-09-18 11:57:20,972 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 11:57:20,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 11:57:20,973 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 11:57:20,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 11:57:20,974 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 11:57:20,974 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:57:20,974 INFO L87 Difference]: Start difference. First operand 60145 states and 70218 transitions. Second operand 5 states. [2018-09-18 11:57:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:57:27,780 INFO L93 Difference]: Finished difference Result 143100 states and 166631 transitions. [2018-09-18 11:57:27,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 11:57:27,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 709 [2018-09-18 11:57:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:57:28,063 INFO L225 Difference]: With dead ends: 143100 [2018-09-18 11:57:28,063 INFO L226 Difference]: Without dead ends: 83269 [2018-09-18 11:57:28,296 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-18 11:57:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83269 states. [2018-09-18 11:57:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83269 to 81860. [2018-09-18 11:57:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81860 states. [2018-09-18 11:57:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81860 states to 81860 states and 93875 transitions. [2018-09-18 11:57:30,187 INFO L78 Accepts]: Start accepts. Automaton has 81860 states and 93875 transitions. Word has length 709 [2018-09-18 11:57:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:57:30,188 INFO L480 AbstractCegarLoop]: Abstraction has 81860 states and 93875 transitions. [2018-09-18 11:57:30,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 11:57:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 81860 states and 93875 transitions. [2018-09-18 11:57:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 714 [2018-09-18 11:57:30,212 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:57:30,212 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:57:30,212 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:57:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash 308401898, now seen corresponding path program 1 times [2018-09-18 11:57:30,213 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:57:30,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:30,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:30,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:57:30,214 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:57:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 437 proven. 400 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:57:31,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:57:31,669 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:57:31,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:31,678 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:57:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:31,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:57:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 595 proven. 126 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-18 11:57:33,389 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:57:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 263 proven. 574 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:57:34,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:57:34,869 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 11:57:34,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:57:34,885 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:57:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:57:35,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:57:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 545 proven. 126 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-09-18 11:57:36,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:57:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 263 proven. 574 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2018-09-18 11:57:37,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 11:57:37,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9, 8, 9] total 23 [2018-09-18 11:57:37,992 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 11:57:37,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 11:57:37,994 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 11:57:37,995 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2018-09-18 11:57:37,995 INFO L87 Difference]: Start difference. First operand 81860 states and 93875 transitions. Second operand 13 states. [2018-09-18 11:58:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 11:58:00,670 INFO L93 Difference]: Finished difference Result 168131 states and 193030 transitions. [2018-09-18 11:58:00,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-18 11:58:00,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 713 [2018-09-18 11:58:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 11:58:00,918 INFO L225 Difference]: With dead ends: 168131 [2018-09-18 11:58:00,918 INFO L226 Difference]: Without dead ends: 83639 [2018-09-18 11:58:01,117 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2909 GetRequests, 2859 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=506, Invalid=1656, Unknown=0, NotChecked=0, Total=2162 [2018-09-18 11:58:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83639 states. [2018-09-18 11:58:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83639 to 82749. [2018-09-18 11:58:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82749 states. [2018-09-18 11:58:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 94323 transitions. [2018-09-18 11:58:02,385 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 94323 transitions. Word has length 713 [2018-09-18 11:58:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 11:58:02,385 INFO L480 AbstractCegarLoop]: Abstraction has 82749 states and 94323 transitions. [2018-09-18 11:58:02,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 11:58:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 94323 transitions. [2018-09-18 11:58:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2018-09-18 11:58:02,409 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 11:58:02,410 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 11:58:02,410 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 11:58:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 270903492, now seen corresponding path program 1 times [2018-09-18 11:58:02,411 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 11:58:02,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:58:02,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:58:02,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 11:58:02,412 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 11:58:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:58:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 473 proven. 211 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-18 11:58:04,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 11:58:04,029 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:58:04,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 11:58:04,037 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 11:58:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 11:58:04,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 11:58:04,697 WARN L178 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 34 [2018-09-18 11:58:06,819 WARN L178 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 35 [2018-09-18 11:58:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 478 proven. 206 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-09-18 11:58:07,264 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 11:58:08,339 WARN L178 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2018-09-18 11:58:08,343 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:08,681 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:08,743 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:08,788 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:08,840 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:08,951 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,033 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,081 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,130 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,200 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,248 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,450 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,499 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,664 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,756 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,811 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-09-18 11:58:09,884 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 Received shutdown request... [2018-09-18 11:58:09,959 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 11:58:10,160 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 11:58:10,161 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 11:58:10,166 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 11:58:10,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 11:58:10 BoogieIcfgContainer [2018-09-18 11:58:10,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 11:58:10,168 INFO L168 Benchmark]: Toolchain (without parser) took 232460.23 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -500.5 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,169 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-18 11:58:10,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1303.57 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 279.93 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: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,171 INFO L168 Benchmark]: Boogie Preprocessor took 599.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 882.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,173 INFO L168 Benchmark]: RCFGBuilder took 9753.93 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 293.1 MB). Peak memory consumption was 293.1 MB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,174 INFO L168 Benchmark]: TraceAbstraction took 220515.33 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 104.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-09-18 11:58:10,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 1303.57 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: 126.8 MB). Peak memory consumption was 126.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 279.93 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: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 599.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 882.4 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 89.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9753.93 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.0 GB in the end (delta: 293.1 MB). Peak memory consumption was 293.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 220515.33 ms. Allocated memory was 2.4 GB in the beginning and 3.9 GB in the end (delta: 1.4 GB). Free memory was 2.0 GB in the beginning and 1.9 GB in the end (delta: 104.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 193]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 193). Cancelled while BasicCegarLoop was analyzing trace of length 715 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 220.4s OverallTime, 19 OverallIterations, 5 TraceHistogramMax, 164.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4683 SDtfs, 30721 SDslu, 4385 SDs, 0 SdLazy, 52277 SolverSat, 9862 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 135.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15787 GetRequests, 15530 SyntacticMatches, 36 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82749occurred in iteration=18, 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: 10.9s AutomataMinimizationTime, 18 MinimizatonAttempts, 12509 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 27.5s InterpolantComputationTime, 15721 NumberOfCodeBlocks, 15721 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 23421 ConstructedInterpolants, 67 QuantifiedInterpolants, 67874101 SizeOfPredicates, 48 NumberOfNonLiveVariables, 11314 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 50 InterpolantComputations, 15 PerfectInterpolantSequences, 20102/24699 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/Problem15_label16_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_11-58-10-192.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem15_label16_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_11-58-10-192.csv Completed graceful shutdown