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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label13_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:27:14,272 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:27:14,275 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:27:14,292 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:27:14,293 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:27:14,294 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:27:14,296 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:27:14,298 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:27:14,301 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:27:14,302 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:27:14,304 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:27:14,305 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:27:14,306 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:27:14,307 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:27:14,308 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:27:14,309 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:27:14,316 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:27:14,318 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:27:14,321 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:27:14,323 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:27:14,324 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:27:14,325 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:27:14,327 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:27:14,327 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:27:14,328 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:27:14,328 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:27:14,329 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:27:14,330 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:27:14,331 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:27:14,332 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:27:14,332 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:27:14,333 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:27:14,333 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:27:14,334 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:27:14,335 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:27:14,335 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:27:14,336 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:27:14,351 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:27:14,352 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:27:14,353 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:27:14,353 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:27:14,353 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:27:14,353 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:27:14,353 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:27:14,354 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:27:14,354 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:27:14,354 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:27:14,354 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:27:14,354 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:27:14,355 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:27:14,355 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:27:14,356 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:27:14,356 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:27:14,356 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:27:14,356 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:27:14,356 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:27:14,357 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:27:14,357 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:27:14,357 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:27:14,357 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:27:14,357 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:27:14,358 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:27:14,358 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:27:14,358 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:27:14,358 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:27:14,358 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:27:14,359 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:27:14,359 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:27:14,359 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:27:14,359 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:27:14,359 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:27:14,360 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:27:14,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:27:14,425 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:27:14,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:27:14,430 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:27:14,431 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:27:14,432 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label13_false-unreach-call_false-termination.c [2018-11-12 16:27:14,495 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/026239edf/25246a8c3733451b8431903f4e89ed96/FLAG1973c57b3 [2018-11-12 16:27:15,130 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:27:15,132 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label13_false-unreach-call_false-termination.c [2018-11-12 16:27:15,151 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/026239edf/25246a8c3733451b8431903f4e89ed96/FLAG1973c57b3 [2018-11-12 16:27:15,171 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/026239edf/25246a8c3733451b8431903f4e89ed96 [2018-11-12 16:27:15,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:27:15,183 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:27:15,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:27:15,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:27:15,189 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:27:15,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:27:15" (1/1) ... [2018-11-12 16:27:15,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d97970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:15, skipping insertion in model container [2018-11-12 16:27:15,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:27:15" (1/1) ... [2018-11-12 16:27:15,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:27:15,292 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:27:15,810 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:27:15,823 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:27:16,008 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:27:16,027 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:27:16,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16 WrapperNode [2018-11-12 16:27:16,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:27:16,028 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:27:16,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:27:16,029 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:27:16,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:27:16,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:27:16,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:27:16,200 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:27:16,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (1/1) ... [2018-11-12 16:27:16,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:27:16,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:27:16,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:27:16,307 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:27:16,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (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 [2018-11-12 16:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:27:16,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:27:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:27:16,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:27:16,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:27:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:27:16,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:27:20,168 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:27:20,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:27:20 BoogieIcfgContainer [2018-11-12 16:27:20,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:27:20,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:27:20,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:27:20,174 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:27:20,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:27:15" (1/3) ... [2018-11-12 16:27:20,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207aec3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:27:20, skipping insertion in model container [2018-11-12 16:27:20,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:27:16" (2/3) ... [2018-11-12 16:27:20,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207aec3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:27:20, skipping insertion in model container [2018-11-12 16:27:20,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:27:20" (3/3) ... [2018-11-12 16:27:20,178 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label13_false-unreach-call_false-termination.c [2018-11-12 16:27:20,186 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:27:20,194 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:27:20,209 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:27:20,258 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:27:20,259 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:27:20,259 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:27:20,259 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:27:20,259 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:27:20,259 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:27:20,260 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:27:20,260 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:27:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:27:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-12 16:27:20,294 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:20,295 INFO L375 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] [2018-11-12 16:27:20,298 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:20,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1859951889, now seen corresponding path program 1 times [2018-11-12 16:27:20,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:20,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:20,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:20,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:20,356 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:20,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:20,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:27:20,822 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:20,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:27:20,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:27:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:27:20,850 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 16:27:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:22,677 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-12 16:27:22,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:27:22,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-11-12 16:27:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:22,702 INFO L225 Difference]: With dead ends: 691 [2018-11-12 16:27:22,702 INFO L226 Difference]: Without dead ends: 434 [2018-11-12 16:27:22,711 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 [2018-11-12 16:27:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-12 16:27:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-12 16:27:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 16:27:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-12 16:27:22,804 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 31 [2018-11-12 16:27:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:22,805 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-12 16:27:22,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:27:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-12 16:27:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-12 16:27:22,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:22,815 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:22,816 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:22,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -984490100, now seen corresponding path program 1 times [2018-11-12 16:27:22,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:22,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:22,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:22,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:22,820 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:23,178 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:23,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 16:27:23,179 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:23,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:27:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:27:23,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 16:27:23,182 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-12 16:27:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:26,826 INFO L93 Difference]: Finished difference Result 1588 states and 2935 transitions. [2018-11-12 16:27:26,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:27:26,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2018-11-12 16:27:26,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:26,847 INFO L225 Difference]: With dead ends: 1588 [2018-11-12 16:27:26,847 INFO L226 Difference]: Without dead ends: 1160 [2018-11-12 16:27:26,852 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 [2018-11-12 16:27:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2018-11-12 16:27:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1153. [2018-11-12 16:27:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2018-11-12 16:27:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1887 transitions. [2018-11-12 16:27:26,924 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1887 transitions. Word has length 101 [2018-11-12 16:27:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:26,924 INFO L480 AbstractCegarLoop]: Abstraction has 1153 states and 1887 transitions. [2018-11-12 16:27:26,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:27:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1887 transitions. [2018-11-12 16:27:26,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-12 16:27:26,929 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:26,929 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:26,930 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:26,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:26,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1471379143, now seen corresponding path program 1 times [2018-11-12 16:27:26,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:26,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:26,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:26,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:26,932 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:27,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:27,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 16:27:27,256 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:27,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 16:27:27,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 16:27:27,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 16:27:27,258 INFO L87 Difference]: Start difference. First operand 1153 states and 1887 transitions. Second operand 5 states. [2018-11-12 16:27:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:29,733 INFO L93 Difference]: Finished difference Result 2716 states and 4601 transitions. [2018-11-12 16:27:29,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:27:29,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2018-11-12 16:27:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:29,753 INFO L225 Difference]: With dead ends: 2716 [2018-11-12 16:27:29,753 INFO L226 Difference]: Without dead ends: 1569 [2018-11-12 16:27:29,762 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2018-11-12 16:27:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1538. [2018-11-12 16:27:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1538 states. [2018-11-12 16:27:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 2356 transitions. [2018-11-12 16:27:29,837 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 2356 transitions. Word has length 102 [2018-11-12 16:27:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:29,838 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 2356 transitions. [2018-11-12 16:27:29,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 16:27:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 2356 transitions. [2018-11-12 16:27:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-12 16:27:29,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:29,846 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:29,847 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:29,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -552645141, now seen corresponding path program 1 times [2018-11-12 16:27:29,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:29,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:29,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:29,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:29,849 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:30,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:30,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 16:27:30,047 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:30,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 16:27:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 16:27:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 16:27:30,048 INFO L87 Difference]: Start difference. First operand 1538 states and 2356 transitions. Second operand 5 states. [2018-11-12 16:27:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:32,568 INFO L93 Difference]: Finished difference Result 4198 states and 6461 transitions. [2018-11-12 16:27:32,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 16:27:32,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2018-11-12 16:27:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:32,585 INFO L225 Difference]: With dead ends: 4198 [2018-11-12 16:27:32,586 INFO L226 Difference]: Without dead ends: 2666 [2018-11-12 16:27:32,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2018-11-12 16:27:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2560. [2018-11-12 16:27:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2018-11-12 16:27:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3629 transitions. [2018-11-12 16:27:32,673 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3629 transitions. Word has length 104 [2018-11-12 16:27:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:32,674 INFO L480 AbstractCegarLoop]: Abstraction has 2560 states and 3629 transitions. [2018-11-12 16:27:32,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 16:27:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3629 transitions. [2018-11-12 16:27:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-12 16:27:32,676 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:32,676 INFO L375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:32,677 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:32,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1700956756, now seen corresponding path program 1 times [2018-11-12 16:27:32,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:32,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:32,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:32,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:32,679 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:32,835 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:27:32,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:27:32,836 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:32,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:27:32,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:27:32,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:27:32,837 INFO L87 Difference]: Start difference. First operand 2560 states and 3629 transitions. Second operand 4 states. [2018-11-12 16:27:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:35,062 INFO L93 Difference]: Finished difference Result 7205 states and 10610 transitions. [2018-11-12 16:27:35,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:27:35,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2018-11-12 16:27:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:35,094 INFO L225 Difference]: With dead ends: 7205 [2018-11-12 16:27:35,094 INFO L226 Difference]: Without dead ends: 4651 [2018-11-12 16:27:35,116 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:27:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2018-11-12 16:27:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 4651. [2018-11-12 16:27:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4651 states. [2018-11-12 16:27:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 6458 transitions. [2018-11-12 16:27:35,258 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 6458 transitions. Word has length 105 [2018-11-12 16:27:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:35,259 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 6458 transitions. [2018-11-12 16:27:35,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:27:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 6458 transitions. [2018-11-12 16:27:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-11-12 16:27:35,276 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:35,277 INFO L375 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:27:35,277 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:35,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1300699199, now seen corresponding path program 1 times [2018-11-12 16:27:35,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:35,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:35,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:35,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:35,279 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:35,997 WARN L179 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-12 16:27:36,442 WARN L179 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-11-12 16:27:36,579 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2018-11-12 16:27:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:27:37,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:27:37,165 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:27:37,166 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 250 with the following transitions: [2018-11-12 16:27:37,168 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:27:37,243 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:27:37,243 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:27:37,939 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:27:37,949 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:27:37,951 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Performed 1028 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1028 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:27:37,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:37,994 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:27:38,528 INFO L227 lantSequenceWeakener]: Weakened 240 states. On average, predicates are now at 77.51% of their original sizes. [2018-11-12 16:27:38,529 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:27:38,730 INFO L415 sIntCurrentIteration]: We unified 248 AI predicates to 248 [2018-11-12 16:27:38,731 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:27:38,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:27:38,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2018-11-12 16:27:38,732 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:27:38,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:27:38,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:27:38,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:27:38,733 INFO L87 Difference]: Start difference. First operand 4651 states and 6458 transitions. Second operand 7 states. [2018-11-12 16:27:55,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:27:55,859 INFO L93 Difference]: Finished difference Result 9481 states and 13140 transitions. [2018-11-12 16:27:55,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:27:55,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 249 [2018-11-12 16:27:55,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:27:55,884 INFO L225 Difference]: With dead ends: 9481 [2018-11-12 16:27:55,884 INFO L226 Difference]: Without dead ends: 4836 [2018-11-12 16:27:55,906 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:27:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2018-11-12 16:27:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4834. [2018-11-12 16:27:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-12 16:27:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6649 transitions. [2018-11-12 16:27:56,286 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6649 transitions. Word has length 249 [2018-11-12 16:27:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:27:56,286 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6649 transitions. [2018-11-12 16:27:56,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:27:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6649 transitions. [2018-11-12 16:27:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-11-12 16:27:56,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:27:56,310 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:27:56,310 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:27:56,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1735802637, now seen corresponding path program 1 times [2018-11-12 16:27:56,311 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:27:56,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:56,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:27:56,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:27:56,312 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:27:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:27:56,799 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:27:56,991 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:27:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 160 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:27:57,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:27:57,500 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:27:57,501 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 335 with the following transitions: [2018-11-12 16:27:57,501 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:27:57,506 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:27:57,507 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:27:57,700 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:27:57,889 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:27:57,889 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Performed 2384 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2384 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:27:57,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:27:57,928 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:27:58,617 INFO L227 lantSequenceWeakener]: Weakened 119 states. On average, predicates are now at 78.09% of their original sizes. [2018-11-12 16:27:58,618 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:00,934 INFO L415 sIntCurrentIteration]: We unified 333 AI predicates to 333 [2018-11-12 16:28:00,935 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:00,935 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:00,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-12 16:28:00,936 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:00,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-12 16:28:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-12 16:28:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-12 16:28:00,938 INFO L87 Difference]: Start difference. First operand 4834 states and 6649 transitions. Second operand 25 states. [2018-11-12 16:28:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:25,303 INFO L93 Difference]: Finished difference Result 9819 states and 13446 transitions. [2018-11-12 16:28:25,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 16:28:25,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 334 [2018-11-12 16:28:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:25,327 INFO L225 Difference]: With dead ends: 9819 [2018-11-12 16:28:25,327 INFO L226 Difference]: Without dead ends: 4839 [2018-11-12 16:28:25,351 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 348 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2018-11-12 16:28:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2018-11-12 16:28:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 4834. [2018-11-12 16:28:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-12 16:28:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6643 transitions. [2018-11-12 16:28:25,488 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6643 transitions. Word has length 334 [2018-11-12 16:28:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:25,488 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6643 transitions. [2018-11-12 16:28:25,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-12 16:28:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6643 transitions. [2018-11-12 16:28:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-12 16:28:25,509 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:25,510 INFO L375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:28:25,510 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:25,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1103940409, now seen corresponding path program 1 times [2018-11-12 16:28:25,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:25,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:25,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:25,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:25,512 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:28:26,025 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:28:26,225 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:28:26,441 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:28:26,829 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-12 16:28:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 85 proven. 303 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:28:27,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:28:27,600 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:28:27,600 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-12 16:28:27,601 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:28:27,604 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:28:27,605 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:28:27,664 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:28:27,756 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:28:27,756 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Performed 2204 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2204 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:28:27,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:27,760 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:28:28,242 INFO L227 lantSequenceWeakener]: Weakened 134 states. On average, predicates are now at 78.08% of their original sizes. [2018-11-12 16:28:28,242 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:28,675 INFO L415 sIntCurrentIteration]: We unified 359 AI predicates to 359 [2018-11-12 16:28:28,675 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:28,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:28,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 16:28:28,676 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:28,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 16:28:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 16:28:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:28:28,678 INFO L87 Difference]: Start difference. First operand 4834 states and 6643 transitions. Second operand 21 states. [2018-11-12 16:28:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:28:41,240 INFO L93 Difference]: Finished difference Result 9484 states and 13110 transitions. [2018-11-12 16:28:41,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:28:41,241 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 360 [2018-11-12 16:28:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:28:41,262 INFO L225 Difference]: With dead ends: 9484 [2018-11-12 16:28:41,262 INFO L226 Difference]: Without dead ends: 4839 [2018-11-12 16:28:41,279 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 377 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-12 16:28:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2018-11-12 16:28:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 4834. [2018-11-12 16:28:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4834 states. [2018-11-12 16:28:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4834 states to 4834 states and 6587 transitions. [2018-11-12 16:28:41,414 INFO L78 Accepts]: Start accepts. Automaton has 4834 states and 6587 transitions. Word has length 360 [2018-11-12 16:28:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:28:41,414 INFO L480 AbstractCegarLoop]: Abstraction has 4834 states and 6587 transitions. [2018-11-12 16:28:41,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 16:28:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4834 states and 6587 transitions. [2018-11-12 16:28:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-11-12 16:28:41,438 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:28:41,438 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:28:41,439 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:28:41,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash -136240211, now seen corresponding path program 1 times [2018-11-12 16:28:41,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:28:41,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:41,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:28:41,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:28:41,444 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:28:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:28:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 189 proven. 166 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-11-12 16:28:42,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:28:42,149 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:28:42,149 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 446 with the following transitions: [2018-11-12 16:28:42,149 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:28:42,157 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:28:42,157 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:28:42,343 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:28:42,722 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:28:42,722 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Performed 5380 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:28:42,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:28:42,749 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:28:44,055 INFO L227 lantSequenceWeakener]: Weakened 133 states. On average, predicates are now at 78% of their original sizes. [2018-11-12 16:28:44,055 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:28:44,611 INFO L415 sIntCurrentIteration]: We unified 444 AI predicates to 444 [2018-11-12 16:28:44,611 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:28:44,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:28:44,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [6] total 29 [2018-11-12 16:28:44,612 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:28:44,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-12 16:28:44,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-12 16:28:44,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2018-11-12 16:28:44,614 INFO L87 Difference]: Start difference. First operand 4834 states and 6587 transitions. Second operand 25 states. [2018-11-12 16:29:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:08,363 INFO L93 Difference]: Finished difference Result 10304 states and 13904 transitions. [2018-11-12 16:29:08,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 16:29:08,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 445 [2018-11-12 16:29:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:08,379 INFO L225 Difference]: With dead ends: 10304 [2018-11-12 16:29:08,380 INFO L226 Difference]: Without dead ends: 4837 [2018-11-12 16:29:08,389 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 469 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=448, Invalid=2002, Unknown=0, NotChecked=0, Total=2450 [2018-11-12 16:29:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2018-11-12 16:29:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4832. [2018-11-12 16:29:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4832 states. [2018-11-12 16:29:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 6564 transitions. [2018-11-12 16:29:08,494 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 6564 transitions. Word has length 445 [2018-11-12 16:29:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:08,495 INFO L480 AbstractCegarLoop]: Abstraction has 4832 states and 6564 transitions. [2018-11-12 16:29:08,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-12 16:29:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 6564 transitions. [2018-11-12 16:29:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-11-12 16:29:08,520 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:08,520 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:08,520 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:08,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2023204654, now seen corresponding path program 1 times [2018-11-12 16:29:08,521 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:08,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:08,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:08,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:08,522 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:09,296 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-12 16:29:09,539 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-11-12 16:29:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-12 16:29:10,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:10,189 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:10,190 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 471 with the following transitions: [2018-11-12 16:29:10,190 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:10,193 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:10,193 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:10,274 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:10,585 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:29:10,585 INFO L272 AbstractInterpreter]: Visited 123 different actions 366 times. Merged at 7 different actions 19 times. Never widened. Performed 3574 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3574 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:29:10,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:10,611 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:29:11,174 INFO L227 lantSequenceWeakener]: Weakened 467 states. On average, predicates are now at 80.16% of their original sizes. [2018-11-12 16:29:11,174 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:29:11,295 INFO L415 sIntCurrentIteration]: We unified 469 AI predicates to 469 [2018-11-12 16:29:11,296 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:29:11,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:29:11,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2018-11-12 16:29:11,296 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:29:11,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:29:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:29:11,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:29:11,297 INFO L87 Difference]: Start difference. First operand 4832 states and 6564 transitions. Second operand 10 states. [2018-11-12 16:29:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:16,476 INFO L93 Difference]: Finished difference Result 9688 states and 13528 transitions. [2018-11-12 16:29:16,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:29:16,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 470 [2018-11-12 16:29:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:16,496 INFO L225 Difference]: With dead ends: 9688 [2018-11-12 16:29:16,497 INFO L226 Difference]: Without dead ends: 5417 [2018-11-12 16:29:16,509 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 477 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:29:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2018-11-12 16:29:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 5395. [2018-11-12 16:29:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5395 states. [2018-11-12 16:29:16,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5395 states to 5395 states and 7341 transitions. [2018-11-12 16:29:16,628 INFO L78 Accepts]: Start accepts. Automaton has 5395 states and 7341 transitions. Word has length 470 [2018-11-12 16:29:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:16,629 INFO L480 AbstractCegarLoop]: Abstraction has 5395 states and 7341 transitions. [2018-11-12 16:29:16,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:29:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5395 states and 7341 transitions. [2018-11-12 16:29:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2018-11-12 16:29:16,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:16,655 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:16,656 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:16,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1157088157, now seen corresponding path program 1 times [2018-11-12 16:29:16,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:16,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:16,657 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 330 proven. 309 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-12 16:29:18,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:18,200 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:18,200 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 538 with the following transitions: [2018-11-12 16:29:18,200 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:18,204 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:18,205 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:18,841 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:19,548 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:19,548 INFO L272 AbstractInterpreter]: Visited 191 different actions 957 times. Merged at 9 different actions 50 times. Widened at 1 different actions 2 times. Performed 12658 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12658 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:19,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:19,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:19,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:19,556 INFO L192 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 [2018-11-12 16:29:19,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:19,569 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:19,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 608 proven. 2 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-11-12 16:29:20,275 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:20,654 WARN L179 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2018-11-12 16:29:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 328 proven. 104 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2018-11-12 16:29:21,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:21,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 16:29:21,259 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:21,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:29:21,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:29:21,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:29:21,261 INFO L87 Difference]: Start difference. First operand 5395 states and 7341 transitions. Second operand 17 states. [2018-11-12 16:29:22,421 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-11-12 16:29:24,692 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-12 16:29:25,108 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2018-11-12 16:29:26,413 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-12 16:29:29,817 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2018-11-12 16:29:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:32,632 INFO L93 Difference]: Finished difference Result 13679 states and 20165 transitions. [2018-11-12 16:29:32,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-12 16:29:32,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 537 [2018-11-12 16:29:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:32,667 INFO L225 Difference]: With dead ends: 13679 [2018-11-12 16:29:32,668 INFO L226 Difference]: Without dead ends: 8845 [2018-11-12 16:29:32,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 16:29:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8845 states. [2018-11-12 16:29:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8845 to 8148. [2018-11-12 16:29:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8148 states. [2018-11-12 16:29:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8148 states to 8148 states and 10885 transitions. [2018-11-12 16:29:32,891 INFO L78 Accepts]: Start accepts. Automaton has 8148 states and 10885 transitions. Word has length 537 [2018-11-12 16:29:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:32,892 INFO L480 AbstractCegarLoop]: Abstraction has 8148 states and 10885 transitions. [2018-11-12 16:29:32,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:29:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 8148 states and 10885 transitions. [2018-11-12 16:29:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-11-12 16:29:32,924 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:32,925 INFO L375 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:32,925 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:32,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:32,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1330600406, now seen corresponding path program 1 times [2018-11-12 16:29:32,926 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:32,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:32,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:32,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:32,927 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 439 proven. 445 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-11-12 16:29:34,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:34,287 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:34,287 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 544 with the following transitions: [2018-11-12 16:29:34,287 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:34,290 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:34,290 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:34,351 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:34,786 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:34,786 INFO L272 AbstractInterpreter]: Visited 125 different actions 493 times. Merged at 8 different actions 29 times. Never widened. Performed 5042 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5042 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:34,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:34,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:34,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:34,792 INFO L192 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 [2018-11-12 16:29:34,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:34,801 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:34,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 781 proven. 2 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-11-12 16:29:35,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 433 proven. 104 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-11-12 16:29:36,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:36,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:29:36,134 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:36,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:29:36,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:29:36,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:29:36,135 INFO L87 Difference]: Start difference. First operand 8148 states and 10885 transitions. Second operand 17 states. [2018-11-12 16:29:37,367 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-11-12 16:29:41,799 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-12 16:29:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:42,977 INFO L93 Difference]: Finished difference Result 15903 states and 22816 transitions. [2018-11-12 16:29:42,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 16:29:42,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 543 [2018-11-12 16:29:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:43,012 INFO L225 Difference]: With dead ends: 15903 [2018-11-12 16:29:43,013 INFO L226 Difference]: Without dead ends: 7111 [2018-11-12 16:29:43,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1096 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2018-11-12 16:29:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7111 states. [2018-11-12 16:29:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7111 to 6712. [2018-11-12 16:29:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6712 states. [2018-11-12 16:29:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 7982 transitions. [2018-11-12 16:29:43,188 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 7982 transitions. Word has length 543 [2018-11-12 16:29:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:43,188 INFO L480 AbstractCegarLoop]: Abstraction has 6712 states and 7982 transitions. [2018-11-12 16:29:43,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:29:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 7982 transitions. [2018-11-12 16:29:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2018-11-12 16:29:43,201 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:43,202 INFO L375 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:43,202 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:43,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1779031265, now seen corresponding path program 2 times [2018-11-12 16:29:43,203 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:43,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:43,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:43,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:43,204 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 471 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-12 16:29:44,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:44,156 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:44,156 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 16:29:44,156 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:29:44,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:44,157 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:29:44,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 16:29:44,173 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 16:29:44,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-12 16:29:44,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 16:29:44,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 729 proven. 46 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2018-11-12 16:29:44,663 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 769 proven. 104 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2018-11-12 16:29:45,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:45,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2018-11-12 16:29:45,249 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:45,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:29:45,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:29:45,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:29:45,250 INFO L87 Difference]: Start difference. First operand 6712 states and 7982 transitions. Second operand 9 states. [2018-11-12 16:29:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:48,181 INFO L93 Difference]: Finished difference Result 20248 states and 30678 transitions. [2018-11-12 16:29:48,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:29:48,182 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 648 [2018-11-12 16:29:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:48,290 INFO L225 Difference]: With dead ends: 20248 [2018-11-12 16:29:48,290 INFO L226 Difference]: Without dead ends: 14097 [2018-11-12 16:29:48,373 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1292 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:29:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14097 states. [2018-11-12 16:29:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14097 to 13638. [2018-11-12 16:29:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13638 states. [2018-11-12 16:29:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13638 states to 13638 states and 16524 transitions. [2018-11-12 16:29:48,823 INFO L78 Accepts]: Start accepts. Automaton has 13638 states and 16524 transitions. Word has length 648 [2018-11-12 16:29:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:48,824 INFO L480 AbstractCegarLoop]: Abstraction has 13638 states and 16524 transitions. [2018-11-12 16:29:48,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:29:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13638 states and 16524 transitions. [2018-11-12 16:29:48,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 656 [2018-11-12 16:29:48,841 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:48,841 INFO L375 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:48,841 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:48,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1759764776, now seen corresponding path program 1 times [2018-11-12 16:29:48,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:48,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:48,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 16:29:48,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:48,843 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 478 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-12 16:29:49,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:49,766 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:49,766 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 656 with the following transitions: [2018-11-12 16:29:49,766 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:49,769 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:49,770 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:49,938 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:50,636 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:50,637 INFO L272 AbstractInterpreter]: Visited 192 different actions 968 times. Merged at 10 different actions 56 times. Widened at 1 different actions 2 times. Performed 11344 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11344 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:29:50,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:50,652 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:50,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:50,652 INFO L192 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 [2018-11-12 16:29:50,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:50,801 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:50,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 858 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-12 16:29:51,399 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:29:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 478 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-12 16:29:52,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:29:52,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:29:52,059 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:29:52,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:29:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:29:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:29:52,061 INFO L87 Difference]: Start difference. First operand 13638 states and 16524 transitions. Second operand 7 states. [2018-11-12 16:29:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:54,936 INFO L93 Difference]: Finished difference Result 33973 states and 51121 transitions. [2018-11-12 16:29:54,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:29:54,936 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 655 [2018-11-12 16:29:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:55,122 INFO L225 Difference]: With dead ends: 33973 [2018-11-12 16:29:55,122 INFO L226 Difference]: Without dead ends: 20896 [2018-11-12 16:29:55,275 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1312 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:29:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20896 states. [2018-11-12 16:29:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20896 to 20141. [2018-11-12 16:29:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20141 states. [2018-11-12 16:29:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 25218 transitions. [2018-11-12 16:29:56,322 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 25218 transitions. Word has length 655 [2018-11-12 16:29:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:56,323 INFO L480 AbstractCegarLoop]: Abstraction has 20141 states and 25218 transitions. [2018-11-12 16:29:56,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:29:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 25218 transitions. [2018-11-12 16:29:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2018-11-12 16:29:56,345 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:56,346 INFO L375 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:56,346 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:56,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1719192567, now seen corresponding path program 1 times [2018-11-12 16:29:56,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:56,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:56,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:56,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:56,348 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 477 proven. 567 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-11-12 16:29:57,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:57,799 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:57,799 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 701 with the following transitions: [2018-11-12 16:29:57,800 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:57,803 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:57,803 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:57,985 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:58,938 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:29:58,938 INFO L272 AbstractInterpreter]: Visited 192 different actions 1154 times. Merged at 10 different actions 62 times. Widened at 1 different actions 3 times. Performed 13599 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13599 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 16 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:29:58,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:58,944 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:29:58,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:58,944 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:29:58,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:58,954 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:29:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:59,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:29:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 903 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-11-12 16:29:59,646 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 523 proven. 104 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2018-11-12 16:30:00,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:00,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-12 16:30:00,565 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:00,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:30:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:30:00,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:30:00,567 INFO L87 Difference]: Start difference. First operand 20141 states and 25218 transitions. Second operand 17 states. [2018-11-12 16:30:04,371 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-12 16:30:04,844 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-11-12 16:30:05,498 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-12 16:30:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:07,860 INFO L93 Difference]: Finished difference Result 39533 states and 50207 transitions. [2018-11-12 16:30:07,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-12 16:30:07,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 700 [2018-11-12 16:30:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:07,936 INFO L225 Difference]: With dead ends: 39533 [2018-11-12 16:30:07,936 INFO L226 Difference]: Without dead ends: 19585 [2018-11-12 16:30:08,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1472 GetRequests, 1422 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-12 16:30:08,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19585 states. [2018-11-12 16:30:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19585 to 19334. [2018-11-12 16:30:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19334 states. [2018-11-12 16:30:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19334 states to 19334 states and 23481 transitions. [2018-11-12 16:30:08,553 INFO L78 Accepts]: Start accepts. Automaton has 19334 states and 23481 transitions. Word has length 700 [2018-11-12 16:30:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:08,554 INFO L480 AbstractCegarLoop]: Abstraction has 19334 states and 23481 transitions. [2018-11-12 16:30:08,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:30:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19334 states and 23481 transitions. [2018-11-12 16:30:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2018-11-12 16:30:08,569 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:08,571 INFO L375 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:08,571 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:08,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1415427705, now seen corresponding path program 1 times [2018-11-12 16:30:08,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:08,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:08,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:08,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:08,573 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 670 proven. 104 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2018-11-12 16:30:09,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:09,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:09,536 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 816 with the following transitions: [2018-11-12 16:30:09,536 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:09,539 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:09,539 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:09,688 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:10,653 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:30:10,653 INFO L272 AbstractInterpreter]: Visited 193 different actions 1173 times. Merged at 11 different actions 75 times. Widened at 1 different actions 2 times. Performed 14185 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14185 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:30:10,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:10,660 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:30:10,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:10,660 INFO L192 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 [2018-11-12 16:30:10,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:10,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:10,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 1150 proven. 2 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2018-11-12 16:30:11,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1838 backedges. 670 proven. 104 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2018-11-12 16:30:11,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:11,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:30:11,980 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:11,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:30:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:30:11,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:30:11,981 INFO L87 Difference]: Start difference. First operand 19334 states and 23481 transitions. Second operand 7 states. [2018-11-12 16:30:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:13,924 INFO L93 Difference]: Finished difference Result 36535 states and 44467 transitions. [2018-11-12 16:30:13,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-12 16:30:13,924 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 815 [2018-11-12 16:30:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:13,968 INFO L225 Difference]: With dead ends: 36535 [2018-11-12 16:30:13,968 INFO L226 Difference]: Without dead ends: 17575 [2018-11-12 16:30:14,015 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1645 GetRequests, 1632 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:30:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17575 states. [2018-11-12 16:30:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17575 to 16759. [2018-11-12 16:30:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16759 states. [2018-11-12 16:30:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16759 states to 16759 states and 19456 transitions. [2018-11-12 16:30:14,356 INFO L78 Accepts]: Start accepts. Automaton has 16759 states and 19456 transitions. Word has length 815 [2018-11-12 16:30:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:14,357 INFO L480 AbstractCegarLoop]: Abstraction has 16759 states and 19456 transitions. [2018-11-12 16:30:14,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:30:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16759 states and 19456 transitions. [2018-11-12 16:30:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2018-11-12 16:30:14,370 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:14,370 INFO L375 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, 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, 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, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:30:14,371 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:14,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1190468721, now seen corresponding path program 1 times [2018-11-12 16:30:14,371 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:14,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:14,372 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 555 proven. 1133 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2018-11-12 16:30:17,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:17,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:17,003 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 911 with the following transitions: [2018-11-12 16:30:17,003 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:17,006 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:17,006 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:17,174 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:17,872 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:30:17,872 INFO L272 AbstractInterpreter]: Visited 194 different actions 987 times. Merged at 11 different actions 65 times. Widened at 1 different actions 2 times. Performed 11373 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11373 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:30:17,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:17,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:30:17,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:17,880 INFO L192 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 [2018-11-12 16:30:17,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:17,891 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:18,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 1681 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2018-11-12 16:30:18,781 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 556 proven. 353 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2018-11-12 16:30:19,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:19,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:30:19,703 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:19,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:30:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:30:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:30:19,705 INFO L87 Difference]: Start difference. First operand 16759 states and 19456 transitions. Second operand 18 states. [2018-11-12 16:30:28,598 WARN L179 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2018-11-12 16:30:29,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:29,894 INFO L93 Difference]: Finished difference Result 33228 states and 38694 transitions. [2018-11-12 16:30:29,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-12 16:30:29,895 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 910 [2018-11-12 16:30:29,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:29,926 INFO L225 Difference]: With dead ends: 33228 [2018-11-12 16:30:29,926 INFO L226 Difference]: Without dead ends: 16843 [2018-11-12 16:30:29,954 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1910 GetRequests, 1847 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-12 16:30:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16843 states. [2018-11-12 16:30:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16843 to 16736. [2018-11-12 16:30:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16736 states. [2018-11-12 16:30:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16736 states to 16736 states and 18795 transitions. [2018-11-12 16:30:30,245 INFO L78 Accepts]: Start accepts. Automaton has 16736 states and 18795 transitions. Word has length 910 [2018-11-12 16:30:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:30,246 INFO L480 AbstractCegarLoop]: Abstraction has 16736 states and 18795 transitions. [2018-11-12 16:30:30,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:30:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 16736 states and 18795 transitions. [2018-11-12 16:30:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2018-11-12 16:30:30,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:30,261 INFO L375 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, 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, 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, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:30,261 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:30,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:30,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1957952450, now seen corresponding path program 1 times [2018-11-12 16:30:30,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:30,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:30,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:30,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:30,263 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 100 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-11-12 16:30:31,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:31,223 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:31,224 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 956 with the following transitions: [2018-11-12 16:30:31,224 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:31,227 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:31,227 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:31,459 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:32,743 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:30:32,744 INFO L272 AbstractInterpreter]: Visited 194 different actions 979 times. Merged at 12 different actions 57 times. Never widened. Performed 12278 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12278 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:30:32,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:32,782 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:30:32,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:32,783 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:30:32,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:32,795 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:33,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 6 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2018-11-12 16:30:33,883 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:30:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1317 proven. 104 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-12 16:30:34,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:30:34,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2018-11-12 16:30:34,916 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:30:34,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:30:34,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:30:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-11-12 16:30:34,917 INFO L87 Difference]: Start difference. First operand 16736 states and 18795 transitions. Second operand 10 states. [2018-11-12 16:30:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:39,272 INFO L93 Difference]: Finished difference Result 38419 states and 43550 transitions. [2018-11-12 16:30:39,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 16:30:39,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 955 [2018-11-12 16:30:39,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:39,336 INFO L225 Difference]: With dead ends: 38419 [2018-11-12 16:30:39,336 INFO L226 Difference]: Without dead ends: 22057 [2018-11-12 16:30:39,365 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1932 GetRequests, 1910 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:30:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22057 states. [2018-11-12 16:30:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22057 to 20839. [2018-11-12 16:30:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20839 states. [2018-11-12 16:30:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20839 states to 20839 states and 23419 transitions. [2018-11-12 16:30:39,701 INFO L78 Accepts]: Start accepts. Automaton has 20839 states and 23419 transitions. Word has length 955 [2018-11-12 16:30:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:39,702 INFO L480 AbstractCegarLoop]: Abstraction has 20839 states and 23419 transitions. [2018-11-12 16:30:39,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:30:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20839 states and 23419 transitions. [2018-11-12 16:30:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1087 [2018-11-12 16:30:39,716 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:39,716 INFO L375 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, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:39,717 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:39,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1401521414, now seen corresponding path program 1 times [2018-11-12 16:30:39,717 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:39,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:39,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:39,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:39,718 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:41,280 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 16 Received shutdown request... [2018-11-12 16:30:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3252 backedges. 875 proven. 1666 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2018-11-12 16:30:44,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:44,131 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:44,131 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1087 with the following transitions: [2018-11-12 16:30:44,131 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [149], [151], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [738], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:44,134 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:44,134 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:44,134 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-12 16:30:44,135 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-12 16:30:44,135 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:30:44,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:44,135 INFO L192 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 [2018-11-12 16:30:44,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:44,144 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:30:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:44,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:30:44,452 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-12 16:30:44,654 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:30:44,654 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:30:44,659 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:30:44,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:30:44 BoogieIcfgContainer [2018-11-12 16:30:44,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:30:44,662 INFO L168 Benchmark]: Toolchain (without parser) took 209479.77 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -173.6 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-11-12 16:30:44,663 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:30:44,664 INFO L168 Benchmark]: CACSL2BoogieTranslator took 843.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:44,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 170.90 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 710.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.8 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:44,665 INFO L168 Benchmark]: Boogie Preprocessor took 106.76 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:30:44,665 INFO L168 Benchmark]: RCFGBuilder took 3862.74 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.1 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. [2018-11-12 16:30:44,674 INFO L168 Benchmark]: TraceAbstraction took 204490.90 ms. Allocated memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 453.9 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. [2018-11-12 16:30:44,693 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 843.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 170.90 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 710.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -791.8 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.76 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3862.74 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 122.1 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204490.90 ms. Allocated memory was 2.2 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 453.9 MB). Peak memory consumption was 2.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 1087 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 204.4s OverallTime, 19 OverallIterations, 9 TraceHistogramMax, 144.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2438 SDtfs, 36913 SDslu, 4462 SDs, 0 SdLazy, 46322 SolverSat, 6837 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.0s Time, PredicateUnifierStatistics: 10 DeclaredPredicates, 13870 GetRequests, 13405 SyntacticMatches, 11 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 23.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20839occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.8s AbstIntTime, 13 AbstIntIterations, 5 AbstIntStrong, 0.9971922002254422 AbsIntWeakeningRatio, 0.08958445763626552 AbsIntAvgWeakeningVarsNumRemoved, 17.682676740420938 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.6s AutomataMinimizationTime, 18 MinimizatonAttempts, 4885 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 23.0s InterpolantComputationTime, 13827 NumberOfCodeBlocks, 13606 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 19556 ConstructedInterpolants, 0 QuantifiedInterpolants, 56315875 SizeOfPredicates, 28 NumberOfNonLiveVariables, 8001 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 34 InterpolantComputations, 5 PerfectInterpolantSequences, 33977/38643 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown