java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-dace188-m [2018-09-14 17:55:09,069 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-14 17:55:09,072 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-14 17:55:09,090 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-14 17:55:09,090 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-14 17:55:09,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-14 17:55:09,093 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-14 17:55:09,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-14 17:55:09,098 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-14 17:55:09,102 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-14 17:55:09,103 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-14 17:55:09,105 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-14 17:55:09,106 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-14 17:55:09,109 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-14 17:55:09,117 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-14 17:55:09,120 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-14 17:55:09,121 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-14 17:55:09,125 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-14 17:55:09,127 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-14 17:55:09,131 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-14 17:55:09,132 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-14 17:55:09,134 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-14 17:55:09,138 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-14 17:55:09,139 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-14 17:55:09,139 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-14 17:55:09,141 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-14 17:55:09,142 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-14 17:55:09,143 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-14 17:55:09,144 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-14 17:55:09,147 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-14 17:55:09,147 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-14 17:55:09,149 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-14 17:55:09,149 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-14 17:55:09,149 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-14 17:55:09,150 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-14 17:55:09,151 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-14 17:55:09,152 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-14 17:55:09,178 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-14 17:55:09,179 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-14 17:55:09,180 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-14 17:55:09,181 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-14 17:55:09,181 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-14 17:55:09,181 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-14 17:55:09,181 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-14 17:55:09,181 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-14 17:55:09,182 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-14 17:55:09,182 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-14 17:55:09,182 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-14 17:55:09,183 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-14 17:55:09,183 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-14 17:55:09,184 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-14 17:55:09,184 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-14 17:55:09,184 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-14 17:55:09,184 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-14 17:55:09,184 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-14 17:55:09,185 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-14 17:55:09,185 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-14 17:55:09,185 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-14 17:55:09,185 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-14 17:55:09,187 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-14 17:55:09,187 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:55:09,187 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-14 17:55:09,188 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-14 17:55:09,188 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-14 17:55:09,188 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-14 17:55:09,188 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-14 17:55:09,188 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-14 17:55:09,189 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-14 17:55:09,189 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-14 17:55:09,189 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-14 17:55:09,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-14 17:55:09,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-14 17:55:09,278 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-14 17:55:09,279 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-14 17:55:09,280 INFO L276 PluginConnector]: CDTParser initialized [2018-09-14 17:55:09,281 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29_true-unreach-call.c [2018-09-14 17:55:09,645 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea84b689/639d14ed634041b4891e4afe12e7556e/FLAG79b1fa1de [2018-09-14 17:55:10,032 INFO L277 CDTParser]: Found 1 translation units. [2018-09-14 17:55:10,034 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29_true-unreach-call.c [2018-09-14 17:55:10,055 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea84b689/639d14ed634041b4891e4afe12e7556e/FLAG79b1fa1de [2018-09-14 17:55:10,069 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea84b689/639d14ed634041b4891e4afe12e7556e [2018-09-14 17:55:10,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-14 17:55:10,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-14 17:55:10,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-14 17:55:10,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-14 17:55:10,092 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-14 17:55:10,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:55:10" (1/1) ... [2018-09-14 17:55:10,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5d1adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:10, skipping insertion in model container [2018-09-14 17:55:10,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 05:55:10" (1/1) ... [2018-09-14 17:55:10,108 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-14 17:55:10,857 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:55:10,877 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-14 17:55:11,128 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-14 17:55:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11 WrapperNode [2018-09-14 17:55:11,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-14 17:55:11,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-14 17:55:11,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-14 17:55:11,233 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-14 17:55:11,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-14 17:55:11,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-14 17:55:11,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-14 17:55:11,399 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-14 17:55:11,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... [2018-09-14 17:55:11,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-14 17:55:11,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-14 17:55:11,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-14 17:55:11,923 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-14 17:55:11,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-14 17:55:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-14 17:55:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-14 17:55:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-09-14 17:55:12,015 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-09-14 17:55:12,015 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-09-14 17:55:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-09-14 17:55:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-14 17:55:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-14 17:55:12,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-14 17:55:12,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-14 17:55:18,798 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-14 17:55:18,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:55:18 BoogieIcfgContainer [2018-09-14 17:55:18,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-14 17:55:18,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-14 17:55:18,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-14 17:55:18,805 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-14 17:55:18,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 05:55:10" (1/3) ... [2018-09-14 17:55:18,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54056103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:55:18, skipping insertion in model container [2018-09-14 17:55:18,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 05:55:11" (2/3) ... [2018-09-14 17:55:18,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54056103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 05:55:18, skipping insertion in model container [2018-09-14 17:55:18,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 05:55:18" (3/3) ... [2018-09-14 17:55:18,809 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label29_true-unreach-call.c [2018-09-14 17:55:18,819 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-14 17:55:18,828 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-14 17:55:18,886 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-14 17:55:18,887 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-14 17:55:18,887 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-14 17:55:18,887 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-14 17:55:18,887 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-14 17:55:18,887 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-14 17:55:18,887 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-14 17:55:18,888 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-14 17:55:18,888 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-14 17:55:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-09-14 17:55:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-14 17:55:18,935 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:18,936 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] [2018-09-14 17:55:18,937 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 354183419, now seen corresponding path program 1 times [2018-09-14 17:55:18,946 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:18,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:18,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:18,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:18,996 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:19,411 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:55:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:55:19,510 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:55:19,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-14 17:55:19,511 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:55:19,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:55:19,537 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:55:19,537 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:55:19,540 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-09-14 17:55:23,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:55:23,434 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-09-14 17:55:23,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:55:23,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2018-09-14 17:55:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:55:23,466 INFO L225 Difference]: With dead ends: 1156 [2018-09-14 17:55:23,466 INFO L226 Difference]: Without dead ends: 744 [2018-09-14 17:55:23,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-14 17:55:23,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-09-14 17:55:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-09-14 17:55:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-09-14 17:55:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-09-14 17:55:23,642 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 53 [2018-09-14 17:55:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:55:23,643 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-09-14 17:55:23,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:55:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-09-14 17:55:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-14 17:55:23,657 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:23,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:55:23,658 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1132116568, now seen corresponding path program 1 times [2018-09-14 17:55:23,659 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:23,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:23,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:23,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:23,662 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:55:24,066 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:55:24,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:55:24,067 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:55:24,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:55:24,069 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:55:24,069 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:55:24,070 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-09-14 17:55:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:55:31,267 INFO L93 Difference]: Finished difference Result 2183 states and 3908 transitions. [2018-09-14 17:55:31,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:55:31,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2018-09-14 17:55:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:55:31,280 INFO L225 Difference]: With dead ends: 2183 [2018-09-14 17:55:31,280 INFO L226 Difference]: Without dead ends: 1445 [2018-09-14 17:55:31,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:55:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2018-09-14 17:55:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1424. [2018-09-14 17:55:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2018-09-14 17:55:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2239 transitions. [2018-09-14 17:55:31,340 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2239 transitions. Word has length 161 [2018-09-14 17:55:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:55:31,341 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 2239 transitions. [2018-09-14 17:55:31,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:55:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2239 transitions. [2018-09-14 17:55:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-14 17:55:31,345 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:31,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:55:31,345 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1480605381, now seen corresponding path program 1 times [2018-09-14 17:55:31,346 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:31,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:31,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:31,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:31,347 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-14 17:55:31,682 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-14 17:55:31,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-14 17:55:31,683 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:55:31,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-14 17:55:31,683 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-14 17:55:31,684 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-09-14 17:55:31,684 INFO L87 Difference]: Start difference. First operand 1424 states and 2239 transitions. Second operand 6 states. [2018-09-14 17:55:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:55:36,168 INFO L93 Difference]: Finished difference Result 3902 states and 6351 transitions. [2018-09-14 17:55:36,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-14 17:55:36,172 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 164 [2018-09-14 17:55:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:55:36,195 INFO L225 Difference]: With dead ends: 3902 [2018-09-14 17:55:36,195 INFO L226 Difference]: Without dead ends: 2484 [2018-09-14 17:55:36,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:55:36,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2018-09-14 17:55:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2474. [2018-09-14 17:55:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2474 states. [2018-09-14 17:55:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3744 transitions. [2018-09-14 17:55:36,304 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3744 transitions. Word has length 164 [2018-09-14 17:55:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:55:36,305 INFO L480 AbstractCegarLoop]: Abstraction has 2474 states and 3744 transitions. [2018-09-14 17:55:36,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-14 17:55:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3744 transitions. [2018-09-14 17:55:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-14 17:55:36,315 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:36,316 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:55:36,316 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1539440952, now seen corresponding path program 1 times [2018-09-14 17:55:36,317 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:36,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:36,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:36,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:36,318 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:36,670 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:55:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:55:37,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:55:37,022 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:55:37,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:37,036 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:55:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:37,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:55:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:55:37,633 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:55:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 92 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-14 17:55:37,897 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:55:37,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2018-09-14 17:55:37,897 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:55:37,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:55:37,899 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:55:37,899 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:55:37,899 INFO L87 Difference]: Start difference. First operand 2474 states and 3744 transitions. Second operand 5 states. [2018-09-14 17:55:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:55:43,677 INFO L93 Difference]: Finished difference Result 8994 states and 13505 transitions. [2018-09-14 17:55:43,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:55:43,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2018-09-14 17:55:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:55:43,720 INFO L225 Difference]: With dead ends: 8994 [2018-09-14 17:55:43,720 INFO L226 Difference]: Without dead ends: 6526 [2018-09-14 17:55:43,739 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 555 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-09-14 17:55:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2018-09-14 17:55:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 6271. [2018-09-14 17:55:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6271 states. [2018-09-14 17:55:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 8315 transitions. [2018-09-14 17:55:43,912 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 8315 transitions. Word has length 280 [2018-09-14 17:55:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:55:43,912 INFO L480 AbstractCegarLoop]: Abstraction has 6271 states and 8315 transitions. [2018-09-14 17:55:43,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:55:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 8315 transitions. [2018-09-14 17:55:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2018-09-14 17:55:43,999 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:43,999 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:55:44,000 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1669932742, now seen corresponding path program 1 times [2018-09-14 17:55:44,000 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:44,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:44,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:44,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:44,002 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:44,350 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:55:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-14 17:55:44,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:55:44,924 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:55:44,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:44,941 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:55:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:45,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:55:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 407 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:55:45,575 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:55:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 242 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-14 17:55:46,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:55:46,537 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 [2018-09-14 17:55:46,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:46,567 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:55:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:46,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:55:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 407 proven. 2 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-09-14 17:55:47,259 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:55:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 242 proven. 115 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2018-09-14 17:55:47,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:55:47,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 16 [2018-09-14 17:55:47,555 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:55:47,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:55:47,557 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:55:47,557 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-09-14 17:55:47,557 INFO L87 Difference]: Start difference. First operand 6271 states and 8315 transitions. Second operand 9 states. [2018-09-14 17:55:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:55:55,949 INFO L93 Difference]: Finished difference Result 16718 states and 22813 transitions. [2018-09-14 17:55:55,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-14 17:55:55,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 489 [2018-09-14 17:55:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:55:56,002 INFO L225 Difference]: With dead ends: 16718 [2018-09-14 17:55:56,003 INFO L226 Difference]: Without dead ends: 10453 [2018-09-14 17:55:56,055 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 1968 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2018-09-14 17:55:56,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10453 states. [2018-09-14 17:55:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10453 to 10167. [2018-09-14 17:55:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10167 states. [2018-09-14 17:55:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10167 states to 10167 states and 12417 transitions. [2018-09-14 17:55:56,284 INFO L78 Accepts]: Start accepts. Automaton has 10167 states and 12417 transitions. Word has length 489 [2018-09-14 17:55:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:55:56,285 INFO L480 AbstractCegarLoop]: Abstraction has 10167 states and 12417 transitions. [2018-09-14 17:55:56,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:55:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10167 states and 12417 transitions. [2018-09-14 17:55:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2018-09-14 17:55:56,330 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:55:56,331 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-09-14 17:55:56,332 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:55:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1301512600, now seen corresponding path program 1 times [2018-09-14 17:55:56,332 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:55:56,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:56,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:56,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:55:56,334 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:55:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-14 17:55:57,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:55:57,695 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:55:57,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:57,712 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:55:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:57,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:55:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 1092 proven. 2 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-09-14 17:55:58,417 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:55:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-14 17:55:59,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:55:59,058 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:55:59,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:55:59,076 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:55:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:55:59,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:56:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 1092 proven. 2 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2018-09-14 17:56:00,030 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:56:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1473 backedges. 582 proven. 115 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2018-09-14 17:56:00,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:56:00,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:56:00,554 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:56:00,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:56:00,556 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:56:00,556 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:56:00,556 INFO L87 Difference]: Start difference. First operand 10167 states and 12417 transitions. Second operand 9 states. [2018-09-14 17:56:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:56:10,887 INFO L93 Difference]: Finished difference Result 20865 states and 26239 transitions. [2018-09-14 17:56:10,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-14 17:56:10,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 845 [2018-09-14 17:56:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:56:10,927 INFO L225 Difference]: With dead ends: 20865 [2018-09-14 17:56:10,928 INFO L226 Difference]: Without dead ends: 10704 [2018-09-14 17:56:10,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3398 GetRequests, 3375 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:56:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10704 states. [2018-09-14 17:56:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10704 to 10691. [2018-09-14 17:56:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10691 states. [2018-09-14 17:56:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10691 states to 10691 states and 12888 transitions. [2018-09-14 17:56:11,165 INFO L78 Accepts]: Start accepts. Automaton has 10691 states and 12888 transitions. Word has length 845 [2018-09-14 17:56:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:56:11,167 INFO L480 AbstractCegarLoop]: Abstraction has 10691 states and 12888 transitions. [2018-09-14 17:56:11,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:56:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10691 states and 12888 transitions. [2018-09-14 17:56:11,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2018-09-14 17:56:11,228 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:56:11,229 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:56:11,229 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:56:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1566960923, now seen corresponding path program 1 times [2018-09-14 17:56:11,230 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:56:11,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:11,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:11,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:11,231 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:56:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 867 proven. 2 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-09-14 17:56:13,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:56:13,489 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:56:13,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:13,498 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:56:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:13,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:56:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2018-09-14 17:56:14,248 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:56:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 276 proven. 450 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2018-09-14 17:56:15,094 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-09-14 17:56:15,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 5] total 19 [2018-09-14 17:56:15,094 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:56:15,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-14 17:56:15,095 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-14 17:56:15,095 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2018-09-14 17:56:15,096 INFO L87 Difference]: Start difference. First operand 10691 states and 12888 transitions. Second operand 5 states. [2018-09-14 17:56:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:56:22,049 INFO L93 Difference]: Finished difference Result 36705 states and 44889 transitions. [2018-09-14 17:56:22,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-14 17:56:22,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 853 [2018-09-14 17:56:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:56:22,178 INFO L225 Difference]: With dead ends: 36705 [2018-09-14 17:56:22,178 INFO L226 Difference]: Without dead ends: 26020 [2018-09-14 17:56:22,226 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1701 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2018-09-14 17:56:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2018-09-14 17:56:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 25164. [2018-09-14 17:56:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25164 states. [2018-09-14 17:56:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25164 states to 25164 states and 30002 transitions. [2018-09-14 17:56:22,738 INFO L78 Accepts]: Start accepts. Automaton has 25164 states and 30002 transitions. Word has length 853 [2018-09-14 17:56:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:56:22,739 INFO L480 AbstractCegarLoop]: Abstraction has 25164 states and 30002 transitions. [2018-09-14 17:56:22,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-14 17:56:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 25164 states and 30002 transitions. [2018-09-14 17:56:22,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 993 [2018-09-14 17:56:22,819 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:56:22,820 INFO L376 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:56:22,820 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:56:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1585438444, now seen corresponding path program 1 times [2018-09-14 17:56:22,821 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:56:22,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:22,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:22,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:22,822 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:56:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:23,966 WARN L178 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-14 17:56:24,323 WARN L178 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-14 17:56:24,819 WARN L178 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-09-14 17:56:25,489 WARN L178 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-14 17:56:25,618 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2018-09-14 17:56:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 985 proven. 2 refuted. 0 times theorem prover too weak. 1043 trivial. 0 not checked. [2018-09-14 17:56:27,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:56:27,456 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:56:27,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:27,464 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:56:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:27,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:56:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1265 proven. 2 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2018-09-14 17:56:28,784 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:56:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 297 proven. 1138 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2018-09-14 17:56:30,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:56:30,586 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:56:30,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:30,606 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:56:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:31,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:56:31,926 WARN L178 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 16 [2018-09-14 17:56:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1354 proven. 2 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2018-09-14 17:56:32,676 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:56:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 722 proven. 115 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2018-09-14 17:56:33,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:56:33,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8, 5, 5] total 29 [2018-09-14 17:56:33,912 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:56:33,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-14 17:56:33,914 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-14 17:56:33,914 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2018-09-14 17:56:33,914 INFO L87 Difference]: Start difference. First operand 25164 states and 30002 transitions. Second operand 19 states. [2018-09-14 17:56:34,427 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 19 [2018-09-14 17:56:35,091 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2018-09-14 17:56:45,381 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-09-14 17:56:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:56:54,043 INFO L93 Difference]: Finished difference Result 61337 states and 73998 transitions. [2018-09-14 17:56:54,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-14 17:56:54,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 992 [2018-09-14 17:56:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:56:54,176 INFO L225 Difference]: With dead ends: 61337 [2018-09-14 17:56:54,177 INFO L226 Difference]: Without dead ends: 36179 [2018-09-14 17:56:54,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4054 GetRequests, 3983 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=894, Invalid=4076, Unknown=0, NotChecked=0, Total=4970 [2018-09-14 17:56:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36179 states. [2018-09-14 17:56:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36179 to 33786. [2018-09-14 17:56:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33786 states. [2018-09-14 17:56:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 39237 transitions. [2018-09-14 17:56:55,232 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 39237 transitions. Word has length 992 [2018-09-14 17:56:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:56:55,233 INFO L480 AbstractCegarLoop]: Abstraction has 33786 states and 39237 transitions. [2018-09-14 17:56:55,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-14 17:56:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 39237 transitions. [2018-09-14 17:56:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1063 [2018-09-14 17:56:55,309 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:56:55,309 INFO L376 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:56:55,310 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:56:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1817666243, now seen corresponding path program 1 times [2018-09-14 17:56:55,311 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:56:55,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:55,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:55,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:56:55,312 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:56:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-14 17:56:56,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:56:56,962 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:56:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:56:56,970 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:56:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:56:57,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:56:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-14 17:56:58,188 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:56:58,415 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-09-14 17:57:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-14 17:57:00,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:57:00,375 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:57:00,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:00,392 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:57:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:00,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:57:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 14 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2018-09-14 17:57:01,945 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:57:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 1001 proven. 2 refuted. 0 times theorem prover too weak. 997 trivial. 0 not checked. [2018-09-14 17:57:04,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:57:04,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 6, 5] total 17 [2018-09-14 17:57:04,141 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:57:04,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 17:57:04,142 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 17:57:04,142 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-09-14 17:57:04,143 INFO L87 Difference]: Start difference. First operand 33786 states and 39237 transitions. Second operand 11 states. [2018-09-14 17:57:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:57:16,738 INFO L93 Difference]: Finished difference Result 71914 states and 86771 transitions. [2018-09-14 17:57:16,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-14 17:57:16,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1062 [2018-09-14 17:57:16,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:57:16,866 INFO L225 Difference]: With dead ends: 71914 [2018-09-14 17:57:16,866 INFO L226 Difference]: Without dead ends: 30035 [2018-09-14 17:57:17,074 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4307 GetRequests, 4261 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2018-09-14 17:57:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30035 states. [2018-09-14 17:57:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30035 to 26838. [2018-09-14 17:57:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26838 states. [2018-09-14 17:57:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26838 states to 26838 states and 28733 transitions. [2018-09-14 17:57:17,633 INFO L78 Accepts]: Start accepts. Automaton has 26838 states and 28733 transitions. Word has length 1062 [2018-09-14 17:57:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:57:17,635 INFO L480 AbstractCegarLoop]: Abstraction has 26838 states and 28733 transitions. [2018-09-14 17:57:17,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-14 17:57:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 26838 states and 28733 transitions. [2018-09-14 17:57:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1305 [2018-09-14 17:57:17,673 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:57:17,674 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:57:17,674 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:57:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1016556783, now seen corresponding path program 1 times [2018-09-14 17:57:17,675 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:57:17,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:17,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:17,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:17,676 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:57:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1874 proven. 215 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2018-09-14 17:57:22,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:57:22,213 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:57:22,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:22,221 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:57:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:22,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:57:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1309 proven. 2 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2018-09-14 17:57:24,232 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:57:24,336 WARN L178 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-09-14 17:57:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1309 proven. 2 refuted. 0 times theorem prover too weak. 1882 trivial. 0 not checked. [2018-09-14 17:57:26,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:57:26,641 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:57:26,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:26,657 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:57:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:27,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:57:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 2190 proven. 2 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2018-09-14 17:57:28,420 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:57:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 788 proven. 228 refuted. 0 times theorem prover too weak. 2177 trivial. 0 not checked. [2018-09-14 17:57:29,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:57:29,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5, 5, 5] total 27 [2018-09-14 17:57:29,967 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:57:29,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-14 17:57:29,969 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-14 17:57:29,969 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2018-09-14 17:57:29,970 INFO L87 Difference]: Start difference. First operand 26838 states and 28733 transitions. Second operand 20 states. [2018-09-14 17:57:37,982 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-09-14 17:57:42,553 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2018-09-14 17:57:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:57:46,617 INFO L93 Difference]: Finished difference Result 56969 states and 61238 transitions. [2018-09-14 17:57:46,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-14 17:57:46,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1304 [2018-09-14 17:57:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:57:46,708 INFO L225 Difference]: With dead ends: 56969 [2018-09-14 17:57:46,708 INFO L226 Difference]: Without dead ends: 28999 [2018-09-14 17:57:46,770 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5305 GetRequests, 5238 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=769, Invalid=3391, Unknown=0, NotChecked=0, Total=4160 [2018-09-14 17:57:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28999 states. [2018-09-14 17:57:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28999 to 27398. [2018-09-14 17:57:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27398 states. [2018-09-14 17:57:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 29140 transitions. [2018-09-14 17:57:47,219 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 29140 transitions. Word has length 1304 [2018-09-14 17:57:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:57:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 27398 states and 29140 transitions. [2018-09-14 17:57:47,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-14 17:57:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 29140 transitions. [2018-09-14 17:57:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1337 [2018-09-14 17:57:47,259 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:57:47,260 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:57:47,260 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:57:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 453709302, now seen corresponding path program 1 times [2018-09-14 17:57:47,261 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:57:47,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:47,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:47,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:47,265 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:57:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-14 17:57:49,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:57:49,213 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:57:49,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:49,221 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:57:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:49,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:57:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 2654 proven. 2 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2018-09-14 17:57:50,414 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:57:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-14 17:57:51,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:57:51,312 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:57:51,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:51,335 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:57:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:52,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:57:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 2654 proven. 2 refuted. 0 times theorem prover too weak. 1194 trivial. 0 not checked. [2018-09-14 17:57:52,971 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:57:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3850 backedges. 926 proven. 392 refuted. 0 times theorem prover too weak. 2532 trivial. 0 not checked. [2018-09-14 17:57:53,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:57:53,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 11 [2018-09-14 17:57:53,779 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:57:53,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-14 17:57:53,781 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-14 17:57:53,781 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-09-14 17:57:53,782 INFO L87 Difference]: Start difference. First operand 27398 states and 29140 transitions. Second operand 9 states. [2018-09-14 17:57:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:57:58,173 INFO L93 Difference]: Finished difference Result 53424 states and 57288 transitions. [2018-09-14 17:57:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-14 17:57:58,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1336 [2018-09-14 17:57:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:57:58,272 INFO L225 Difference]: With dead ends: 53424 [2018-09-14 17:57:58,272 INFO L226 Difference]: Without dead ends: 28400 [2018-09-14 17:57:58,327 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5366 GetRequests, 5345 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-09-14 17:57:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28400 states. [2018-09-14 17:57:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28400 to 25370. [2018-09-14 17:57:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25370 states. [2018-09-14 17:57:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25370 states to 25370 states and 26640 transitions. [2018-09-14 17:57:58,746 INFO L78 Accepts]: Start accepts. Automaton has 25370 states and 26640 transitions. Word has length 1336 [2018-09-14 17:57:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:57:58,747 INFO L480 AbstractCegarLoop]: Abstraction has 25370 states and 26640 transitions. [2018-09-14 17:57:58,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-14 17:57:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 25370 states and 26640 transitions. [2018-09-14 17:57:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2018-09-14 17:57:58,780 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:57:58,782 INFO L376 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:57:58,782 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:57:58,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2125149362, now seen corresponding path program 1 times [2018-09-14 17:57:58,783 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:57:58,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:58,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:57:58,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:57:58,784 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:57:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:57:59,658 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-09-14 17:58:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 1774 proven. 643 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2018-09-14 17:58:01,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:01,499 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 [2018-09-14 17:58:01,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:01,506 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:01,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 2911 trivial. 0 not checked. [2018-09-14 17:58:02,497 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:58:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 2911 trivial. 0 not checked. [2018-09-14 17:58:03,157 INFO L313 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-09-14 17:58:03,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-09-14 17:58:03,158 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-14 17:58:03,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-14 17:58:03,162 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-14 17:58:03,162 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:58:03,163 INFO L87 Difference]: Start difference. First operand 25370 states and 26640 transitions. Second operand 3 states. [2018-09-14 17:58:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:58:04,529 INFO L93 Difference]: Finished difference Result 51788 states and 54684 transitions. [2018-09-14 17:58:04,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-14 17:58:04,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1359 [2018-09-14 17:58:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:58:04,587 INFO L225 Difference]: With dead ends: 51788 [2018-09-14 17:58:04,587 INFO L226 Difference]: Without dead ends: 27102 [2018-09-14 17:58:04,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2732 GetRequests, 2720 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-09-14 17:58:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27102 states. [2018-09-14 17:58:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27102 to 26764. [2018-09-14 17:58:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26764 states. [2018-09-14 17:58:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26764 states to 26764 states and 28268 transitions. [2018-09-14 17:58:04,987 INFO L78 Accepts]: Start accepts. Automaton has 26764 states and 28268 transitions. Word has length 1359 [2018-09-14 17:58:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:58:04,989 INFO L480 AbstractCegarLoop]: Abstraction has 26764 states and 28268 transitions. [2018-09-14 17:58:04,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-14 17:58:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 26764 states and 28268 transitions. [2018-09-14 17:58:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1395 [2018-09-14 17:58:05,021 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:58:05,022 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-09-14 17:58:05,022 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:58:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash -779481978, now seen corresponding path program 1 times [2018-09-14 17:58:05,023 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:58:05,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:05,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:05,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:05,024 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:58:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:06,248 WARN L178 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-09-14 17:58:06,520 WARN L178 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-09-14 17:58:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1067 proven. 110 refuted. 0 times theorem prover too weak. 2979 trivial. 0 not checked. [2018-09-14 17:58:07,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:07,890 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:58:07,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:07,900 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:08,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 2748 proven. 6 refuted. 0 times theorem prover too weak. 1402 trivial. 0 not checked. [2018-09-14 17:58:09,243 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:58:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1624 proven. 361 refuted. 0 times theorem prover too weak. 2171 trivial. 0 not checked. [2018-09-14 17:58:11,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:11,243 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 18 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 18 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:58:11,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:11,262 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:12,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1472 proven. 872 refuted. 0 times theorem prover too weak. 1812 trivial. 0 not checked. [2018-09-14 17:58:13,109 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:58:13,310 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-09-14 17:58:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4156 backedges. 1476 proven. 2 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2018-09-14 17:58:15,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:58:15,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 7, 5] total 25 [2018-09-14 17:58:15,720 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:58:15,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-14 17:58:15,723 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-14 17:58:15,723 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-09-14 17:58:15,723 INFO L87 Difference]: Start difference. First operand 26764 states and 28268 transitions. Second operand 13 states. [2018-09-14 17:58:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:58:30,049 INFO L93 Difference]: Finished difference Result 62656 states and 66369 transitions. [2018-09-14 17:58:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-14 17:58:30,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1394 [2018-09-14 17:58:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:58:30,136 INFO L225 Difference]: With dead ends: 62656 [2018-09-14 17:58:30,136 INFO L226 Difference]: Without dead ends: 35311 [2018-09-14 17:58:30,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5635 GetRequests, 5581 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2018-09-14 17:58:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35311 states. [2018-09-14 17:58:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35311 to 31338. [2018-09-14 17:58:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31338 states. [2018-09-14 17:58:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31338 states to 31338 states and 33012 transitions. [2018-09-14 17:58:30,625 INFO L78 Accepts]: Start accepts. Automaton has 31338 states and 33012 transitions. Word has length 1394 [2018-09-14 17:58:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:58:30,625 INFO L480 AbstractCegarLoop]: Abstraction has 31338 states and 33012 transitions. [2018-09-14 17:58:30,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-14 17:58:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31338 states and 33012 transitions. [2018-09-14 17:58:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1418 [2018-09-14 17:58:30,661 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:58:30,662 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-09-14 17:58:30,663 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:58:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1765509733, now seen corresponding path program 1 times [2018-09-14 17:58:30,663 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:58:30,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:30,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:30,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:30,664 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:58:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:31,910 WARN L178 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-14 17:58:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-14 17:58:33,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:33,475 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:58:33,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:33,483 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:33,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-14 17:58:34,851 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:58:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 1469 proven. 2 refuted. 0 times theorem prover too weak. 2509 trivial. 0 not checked. [2018-09-14 17:58:38,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:38,763 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 20 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 20 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-14 17:58:38,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:38,782 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:39,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 2706 proven. 2 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2018-09-14 17:58:40,388 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-14 17:58:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 854 proven. 336 refuted. 0 times theorem prover too weak. 2790 trivial. 0 not checked. [2018-09-14 17:58:42,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-14 17:58:42,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5, 5, 5] total 18 [2018-09-14 17:58:42,622 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-14 17:58:42,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-14 17:58:42,624 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-14 17:58:42,624 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2018-09-14 17:58:42,625 INFO L87 Difference]: Start difference. First operand 31338 states and 33012 transitions. Second operand 11 states. [2018-09-14 17:58:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-14 17:58:51,579 INFO L93 Difference]: Finished difference Result 62509 states and 65986 transitions. [2018-09-14 17:58:51,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-14 17:58:51,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1417 [2018-09-14 17:58:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-14 17:58:51,620 INFO L225 Difference]: With dead ends: 62509 [2018-09-14 17:58:51,620 INFO L226 Difference]: Without dead ends: 24143 [2018-09-14 17:58:51,661 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5723 GetRequests, 5679 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2018-09-14 17:58:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24143 states. [2018-09-14 17:58:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24143 to 22859. [2018-09-14 17:58:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22859 states. [2018-09-14 17:58:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22859 states to 22859 states and 23765 transitions. [2018-09-14 17:58:51,888 INFO L78 Accepts]: Start accepts. Automaton has 22859 states and 23765 transitions. Word has length 1417 [2018-09-14 17:58:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-14 17:58:51,889 INFO L480 AbstractCegarLoop]: Abstraction has 22859 states and 23765 transitions. [2018-09-14 17:58:51,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-14 17:58:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 22859 states and 23765 transitions. [2018-09-14 17:58:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1434 [2018-09-14 17:58:51,909 INFO L368 BasicCegarLoop]: Found error trace [2018-09-14 17:58:51,910 INFO L376 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-14 17:58:51,910 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-14 17:58:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1987735957, now seen corresponding path program 1 times [2018-09-14 17:58:51,911 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-14 17:58:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:51,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:51,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-14 17:58:51,912 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-14 17:58:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:52,888 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 Received shutdown request... [2018-09-14 17:58:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 2126 proven. 695 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2018-09-14 17:58:54,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-14 17:58:54,827 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:58:54,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-14 17:58:54,836 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-14 17:58:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-14 17:58:55,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-14 17:58:55,206 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-14 17:58:55,407 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-14 17:58:55,408 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-14 17:58:55,412 WARN L206 ceAbstractionStarter]: Timeout [2018-09-14 17:58:55,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 05:58:55 BoogieIcfgContainer [2018-09-14 17:58:55,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-14 17:58:55,413 INFO L168 Benchmark]: Toolchain (without parser) took 225332.01 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -417.0 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,414 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-14 17:58:55,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1146.98 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,416 INFO L168 Benchmark]: Boogie Procedure Inliner took 165.80 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,416 INFO L168 Benchmark]: Boogie Preprocessor took 523.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -954.0 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,417 INFO L168 Benchmark]: RCFGBuilder took 6877.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 274.6 MB). Peak memory consumption was 274.6 MB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,418 INFO L168 Benchmark]: TraceAbstraction took 216611.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 146.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-09-14 17:58:55,423 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1146.98 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: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 165.80 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 523.86 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 809.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -954.0 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 6877.37 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 274.6 MB). Peak memory consumption was 274.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216611.37 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.7 GB). Free memory was 2.0 GB in the beginning and 1.8 GB in the end (delta: 146.1 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 145). Cancelled while BasicCegarLoop was analyzing trace of length 1434 with TraceHistMax 9, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 8 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 216.5s OverallTime, 15 OverallIterations, 9 TraceHistogramMax, 127.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1723 SDtfs, 37745 SDslu, 4110 SDs, 0 SdLazy, 84060 SolverSat, 12397 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 95.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40843 GetRequests, 40412 SyntacticMatches, 41 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 22.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33786occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 17257 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 7.9s SatisfiabilityAnalysisTime, 57.8s InterpolantComputationTime, 31879 NumberOfCodeBlocks, 31879 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 51997 ConstructedInterpolants, 21 QuantifiedInterpolants, 191713501 SizeOfPredicates, 19 NumberOfNonLiveVariables, 26730 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 52 InterpolantComputations, 7 PerfectInterpolantSequences, 114827/121562 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label29_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-14_17-58-55-443.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Problem16_label29_true-unreach-call.c_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-14_17-58-55-443.csv Completed graceful shutdown