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_label29_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:29:29,433 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:29:29,435 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:29:29,447 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:29:29,447 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:29:29,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:29:29,449 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:29:29,451 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:29:29,453 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:29:29,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:29:29,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:29:29,455 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:29:29,455 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:29:29,456 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:29:29,458 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:29:29,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:29:29,459 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:29:29,461 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:29:29,465 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:29:29,467 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:29:29,470 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:29:29,471 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:29:29,477 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:29:29,477 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:29:29,477 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:29:29,478 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:29:29,485 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:29:29,486 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:29:29,486 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:29:29,491 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:29:29,491 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:29:29,492 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:29:29,492 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:29:29,492 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:29:29,493 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:29:29,494 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:29:29,495 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 16:29:29,524 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:29:29,524 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:29:29,525 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:29:29,525 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:29:29,525 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:29:29,525 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:29:29,526 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:29:29,526 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:29:29,526 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:29:29,526 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:29:29,526 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:29:29,527 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:29:29,527 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:29:29,528 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:29:29,528 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:29:29,528 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:29:29,528 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:29:29,528 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:29:29,529 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:29:29,529 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:29:29,529 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:29:29,529 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:29:29,530 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:29:29,530 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:29:29,530 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:29:29,530 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:29:29,530 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:29:29,531 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:29:29,531 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:29:29,531 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:29:29,531 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:29:29,531 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:29:29,532 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:29:29,532 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:29:29,532 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:29:29,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:29:29,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:29:29,635 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:29:29,637 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:29:29,638 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:29:29,639 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29_false-unreach-call_false-termination.c [2018-11-12 16:29:29,715 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43cb27657/73f22ce2d8f14cc3b0994efb62af2f39/FLAG518618177 [2018-11-12 16:29:30,274 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:29:30,275 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29_false-unreach-call_false-termination.c [2018-11-12 16:29:30,296 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43cb27657/73f22ce2d8f14cc3b0994efb62af2f39/FLAG518618177 [2018-11-12 16:29:30,318 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43cb27657/73f22ce2d8f14cc3b0994efb62af2f39 [2018-11-12 16:29:30,331 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:29:30,334 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:29:30,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:29:30,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:29:30,341 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:29:30,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:30" (1/1) ... [2018-11-12 16:29:30,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2b0430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:30, skipping insertion in model container [2018-11-12 16:29:30,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:30" (1/1) ... [2018-11-12 16:29:30,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:29:30,429 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:29:31,013 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:29:31,019 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:29:31,154 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:29:31,172 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:29:31,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31 WrapperNode [2018-11-12 16:29:31,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:29:31,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:29:31,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:29:31,174 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:29:31,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:29:31,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:29:31,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:29:31,312 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:29:31,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (1/1) ... [2018-11-12 16:29:31,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:29:31,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:29:31,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:29:31,418 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:29:31,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (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 16:29:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:29:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:29:31,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:29:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:29:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:29:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:29:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:29:31,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:29:31,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:29:35,086 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:29:35,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:35 BoogieIcfgContainer [2018-11-12 16:29:35,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:29:35,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:29:35,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:29:35,092 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:29:35,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:29:30" (1/3) ... [2018-11-12 16:29:35,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33306459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:35, skipping insertion in model container [2018-11-12 16:29:35,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:31" (2/3) ... [2018-11-12 16:29:35,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33306459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:35, skipping insertion in model container [2018-11-12 16:29:35,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:35" (3/3) ... [2018-11-12 16:29:35,096 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label29_false-unreach-call_false-termination.c [2018-11-12 16:29:35,107 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:29:35,116 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:29:35,134 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:29:35,170 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:29:35,171 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:29:35,171 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:29:35,171 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:29:35,171 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:29:35,171 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:29:35,171 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:29:35,172 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:29:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:29:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-12 16:29:35,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:35,206 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] [2018-11-12 16:29:35,208 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:35,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1296810127, now seen corresponding path program 1 times [2018-11-12 16:29:35,217 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:35,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:35,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:35,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:35,267 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:35,606 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 16:29:35,610 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:29:35,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:29:35,611 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:29:35,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:29:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:29:35,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:29:35,633 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 16:29:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:38,477 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-12 16:29:38,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:29:38,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2018-11-12 16:29:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:38,501 INFO L225 Difference]: With dead ends: 894 [2018-11-12 16:29:38,501 INFO L226 Difference]: Without dead ends: 633 [2018-11-12 16:29:38,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:29:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-12 16:29:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-12 16:29:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-12 16:29:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 962 transitions. [2018-11-12 16:29:38,604 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 962 transitions. Word has length 23 [2018-11-12 16:29:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:38,605 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 962 transitions. [2018-11-12 16:29:38,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:29:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 962 transitions. [2018-11-12 16:29:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-12 16:29:38,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:38,613 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:38,614 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:38,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1722550117, now seen corresponding path program 1 times [2018-11-12 16:29:38,615 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:38,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:38,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:38,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:38,618 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:29:38,943 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:29:38,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:29:38,943 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:29:38,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:29:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:29:38,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:29:38,947 INFO L87 Difference]: Start difference. First operand 633 states and 962 transitions. Second operand 4 states. [2018-11-12 16:29:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:42,035 INFO L93 Difference]: Finished difference Result 2170 states and 3490 transitions. [2018-11-12 16:29:42,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:29:42,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2018-11-12 16:29:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:42,056 INFO L225 Difference]: With dead ends: 2170 [2018-11-12 16:29:42,056 INFO L226 Difference]: Without dead ends: 1543 [2018-11-12 16:29:42,063 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 16:29:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2018-11-12 16:29:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2018-11-12 16:29:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2018-11-12 16:29:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2271 transitions. [2018-11-12 16:29:42,152 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2271 transitions. Word has length 136 [2018-11-12 16:29:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:42,153 INFO L480 AbstractCegarLoop]: Abstraction has 1543 states and 2271 transitions. [2018-11-12 16:29:42,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:29:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2271 transitions. [2018-11-12 16:29:42,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-11-12 16:29:42,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:42,165 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:29:42,166 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:42,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:42,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1034192261, now seen corresponding path program 1 times [2018-11-12 16:29:42,166 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:42,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:42,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:42,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:42,168 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 32 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:29:42,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:29:42,820 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:29:42,821 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2018-11-12 16:29:42,823 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:29:42,869 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:29:42,869 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:29:43,595 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:29:43,604 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:29:43,605 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Performed 1026 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1026 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:29:43,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:43,641 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:29:44,318 INFO L227 lantSequenceWeakener]: Weakened 202 states. On average, predicates are now at 77.37% of their original sizes. [2018-11-12 16:29:44,318 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:29:44,684 INFO L415 sIntCurrentIteration]: We unified 210 AI predicates to 210 [2018-11-12 16:29:44,685 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:29:44,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:29:44,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-12 16:29:44,686 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:29:44,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:29:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:29:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:29:44,687 INFO L87 Difference]: Start difference. First operand 1543 states and 2271 transitions. Second operand 7 states. [2018-11-12 16:29:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:29:58,463 INFO L93 Difference]: Finished difference Result 3265 states and 4776 transitions. [2018-11-12 16:29:58,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:29:58,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2018-11-12 16:29:58,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:29:58,477 INFO L225 Difference]: With dead ends: 3265 [2018-11-12 16:29:58,477 INFO L226 Difference]: Without dead ends: 1728 [2018-11-12 16:29:58,483 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:29:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2018-11-12 16:29:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2018-11-12 16:29:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-11-12 16:29:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2461 transitions. [2018-11-12 16:29:58,550 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2461 transitions. Word has length 211 [2018-11-12 16:29:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:29:58,551 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2461 transitions. [2018-11-12 16:29:58,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:29:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2461 transitions. [2018-11-12 16:29:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-11-12 16:29:58,560 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:29:58,561 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:29:58,561 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:29:58,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:29:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash 931255223, now seen corresponding path program 1 times [2018-11-12 16:29:58,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:29:58,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:58,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:29:58,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:29:58,565 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:29:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:29:59,207 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:29:59,408 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:30:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 136 proven. 142 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:00,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:00,269 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:00,269 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 297 with the following transitions: [2018-11-12 16:30:00,270 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:00,276 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:00,276 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:00,434 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:00,617 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:00,618 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Performed 2394 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2394 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 16:30:00,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:00,657 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:01,221 INFO L227 lantSequenceWeakener]: Weakened 81 states. On average, predicates are now at 78.03% of their original sizes. [2018-11-12 16:30:01,222 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:03,038 INFO L415 sIntCurrentIteration]: We unified 295 AI predicates to 295 [2018-11-12 16:30:03,039 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:03,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:03,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [25] imperfect sequences [12] total 35 [2018-11-12 16:30:03,040 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:03,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-12 16:30:03,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-12 16:30:03,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-11-12 16:30:03,042 INFO L87 Difference]: Start difference. First operand 1726 states and 2461 transitions. Second operand 25 states. [2018-11-12 16:30:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:32,947 INFO L93 Difference]: Finished difference Result 3979 states and 5656 transitions. [2018-11-12 16:30:32,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 16:30:32,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 296 [2018-11-12 16:30:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:32,960 INFO L225 Difference]: With dead ends: 3979 [2018-11-12 16:30:32,961 INFO L226 Difference]: Without dead ends: 2442 [2018-11-12 16:30:32,967 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 311 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2018-11-12 16:30:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2018-11-12 16:30:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2434. [2018-11-12 16:30:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2018-11-12 16:30:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3203 transitions. [2018-11-12 16:30:33,037 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3203 transitions. Word has length 296 [2018-11-12 16:30:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:33,038 INFO L480 AbstractCegarLoop]: Abstraction has 2434 states and 3203 transitions. [2018-11-12 16:30:33,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-12 16:30:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3203 transitions. [2018-11-12 16:30:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-11-12 16:30:33,046 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:33,047 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:30:33,047 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:33,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:33,048 INFO L82 PathProgramCache]: Analyzing trace with hash 57910923, now seen corresponding path program 1 times [2018-11-12 16:30:33,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:33,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:33,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:33,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:33,049 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:33,558 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:30:33,758 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:30:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:30:35,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:35,167 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:35,167 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 323 with the following transitions: [2018-11-12 16:30:35,167 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:35,175 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:35,175 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:35,308 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:35,422 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:35,422 INFO L272 AbstractInterpreter]: Visited 122 different actions 240 times. Merged at 5 different actions 7 times. Never widened. Performed 3105 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3105 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 16:30:35,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:35,448 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:35,819 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 78.01% of their original sizes. [2018-11-12 16:30:35,819 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:36,812 INFO L415 sIntCurrentIteration]: We unified 321 AI predicates to 321 [2018-11-12 16:30:36,812 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:36,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:36,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 16:30:36,813 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:36,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 16:30:36,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 16:30:36,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-12 16:30:36,814 INFO L87 Difference]: Start difference. First operand 2434 states and 3203 transitions. Second operand 21 states. [2018-11-12 16:30:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:30:52,352 INFO L93 Difference]: Finished difference Result 4344 states and 5953 transitions. [2018-11-12 16:30:52,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:30:52,352 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 322 [2018-11-12 16:30:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:30:52,366 INFO L225 Difference]: With dead ends: 4344 [2018-11-12 16:30:52,366 INFO L226 Difference]: Without dead ends: 2807 [2018-11-12 16:30:52,372 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 339 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-12 16:30:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2018-11-12 16:30:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2802. [2018-11-12 16:30:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2018-11-12 16:30:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3599 transitions. [2018-11-12 16:30:52,443 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3599 transitions. Word has length 322 [2018-11-12 16:30:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:30:52,443 INFO L480 AbstractCegarLoop]: Abstraction has 2802 states and 3599 transitions. [2018-11-12 16:30:52,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 16:30:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3599 transitions. [2018-11-12 16:30:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2018-11-12 16:30:52,455 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:30:52,456 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:30:52,456 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:30:52,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2095528423, now seen corresponding path program 1 times [2018-11-12 16:30:52,457 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:30:52,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:30:52,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:30:52,458 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:30:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:30:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 157 proven. 182 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-11-12 16:30:52,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:30:52,794 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:30:52,794 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 408 with the following transitions: [2018-11-12 16:30:52,795 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:30:52,803 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:30:52,804 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:30:52,967 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:30:53,241 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:30:53,241 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Performed 5960 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5960 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 16:30:53,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:30:53,249 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:30:53,893 INFO L227 lantSequenceWeakener]: Weakened 108 states. On average, predicates are now at 77.84% of their original sizes. [2018-11-12 16:30:53,893 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:30:58,861 INFO L415 sIntCurrentIteration]: We unified 406 AI predicates to 406 [2018-11-12 16:30:58,862 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:30:58,862 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:30:58,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [6] total 27 [2018-11-12 16:30:58,863 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:30:58,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-12 16:30:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-12 16:30:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-11-12 16:30:58,867 INFO L87 Difference]: Start difference. First operand 2802 states and 3599 transitions. Second operand 23 states. [2018-11-12 16:31:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:30,195 INFO L93 Difference]: Finished difference Result 5253 states and 7023 transitions. [2018-11-12 16:31:30,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 16:31:30,195 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 407 [2018-11-12 16:31:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:30,212 INFO L225 Difference]: With dead ends: 5253 [2018-11-12 16:31:30,212 INFO L226 Difference]: Without dead ends: 3716 [2018-11-12 16:31:30,219 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 428 GetRequests, 262 SyntacticMatches, 123 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2018-11-12 16:31:30,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2018-11-12 16:31:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3256. [2018-11-12 16:31:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3256 states. [2018-11-12 16:31:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4097 transitions. [2018-11-12 16:31:30,308 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4097 transitions. Word has length 407 [2018-11-12 16:31:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:30,308 INFO L480 AbstractCegarLoop]: Abstraction has 3256 states and 4097 transitions. [2018-11-12 16:31:30,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-12 16:31:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4097 transitions. [2018-11-12 16:31:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-11-12 16:31:30,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:30,327 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 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 16:31:30,327 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:30,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash -296131329, now seen corresponding path program 1 times [2018-11-12 16:31:30,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:30,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:30,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:30,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:30,329 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:30,670 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:31:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 212 proven. 257 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-11-12 16:31:31,386 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:31,386 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:31,387 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 424 with the following transitions: [2018-11-12 16:31:31,387 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [630], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:31,391 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:31,392 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:31,594 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:31,740 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:31,740 INFO L272 AbstractInterpreter]: Visited 121 different actions 360 times. Merged at 7 different actions 19 times. Never widened. Performed 3448 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3448 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 16:31:31,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:31,778 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:32,139 INFO L227 lantSequenceWeakener]: Weakened 420 states. On average, predicates are now at 80.08% of their original sizes. [2018-11-12 16:31:32,140 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:31:32,251 INFO L415 sIntCurrentIteration]: We unified 422 AI predicates to 422 [2018-11-12 16:31:32,251 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:31:32,251 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:31:32,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 16:31:32,252 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:31:32,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:31:32,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:31:32,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:31:32,253 INFO L87 Difference]: Start difference. First operand 3256 states and 4097 transitions. Second operand 10 states. [2018-11-12 16:31:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:40,752 INFO L93 Difference]: Finished difference Result 6200 states and 8197 transitions. [2018-11-12 16:31:40,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:31:40,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 423 [2018-11-12 16:31:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:40,770 INFO L225 Difference]: With dead ends: 6200 [2018-11-12 16:31:40,771 INFO L226 Difference]: Without dead ends: 4211 [2018-11-12 16:31:40,778 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 430 GetRequests, 414 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 16:31:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2018-11-12 16:31:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 4002. [2018-11-12 16:31:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4002 states. [2018-11-12 16:31:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 4995 transitions. [2018-11-12 16:31:40,876 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 4995 transitions. Word has length 423 [2018-11-12 16:31:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:40,877 INFO L480 AbstractCegarLoop]: Abstraction has 4002 states and 4995 transitions. [2018-11-12 16:31:40,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:31:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 4995 transitions. [2018-11-12 16:31:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2018-11-12 16:31:40,896 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:40,897 INFO L375 BasicCegarLoop]: trace histogram [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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:40,897 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:40,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1495468967, now seen corresponding path program 1 times [2018-11-12 16:31:40,898 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:40,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:40,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:40,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:40,899 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:42,767 WARN L179 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:31:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 400 proven. 387 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-12 16:31:43,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:43,183 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:43,183 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 507 with the following transitions: [2018-11-12 16:31:43,184 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [510], [511], [514], [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], [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 16:31:43,186 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:43,186 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:43,223 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:43,535 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:31:43,535 INFO L272 AbstractInterpreter]: Visited 125 different actions 493 times. Merged at 8 different actions 29 times. Never widened. Performed 5077 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5077 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 16:31:43,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:43,542 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:31:43,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:43,543 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 16:31:43,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:43,553 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:31:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:43,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:31:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 714 proven. 2 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-11-12 16:31:44,186 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:31:44,483 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-12 16:31:44,698 WARN L179 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-12 16:31:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 249 proven. 144 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2018-11-12 16:31:45,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:31:45,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:31:45,404 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:31:45,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:31:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:31:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:31:45,406 INFO L87 Difference]: Start difference. First operand 4002 states and 4995 transitions. Second operand 17 states. [2018-11-12 16:31:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:31:55,096 INFO L93 Difference]: Finished difference Result 10826 states and 15615 transitions. [2018-11-12 16:31:55,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-12 16:31:55,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 506 [2018-11-12 16:31:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:31:55,129 INFO L225 Difference]: With dead ends: 10826 [2018-11-12 16:31:55,129 INFO L226 Difference]: Without dead ends: 5336 [2018-11-12 16:31:55,165 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=652, Invalid=2770, Unknown=0, NotChecked=0, Total=3422 [2018-11-12 16:31:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2018-11-12 16:31:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4977. [2018-11-12 16:31:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4977 states. [2018-11-12 16:31:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4977 states to 4977 states and 5833 transitions. [2018-11-12 16:31:55,319 INFO L78 Accepts]: Start accepts. Automaton has 4977 states and 5833 transitions. Word has length 506 [2018-11-12 16:31:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:31:55,320 INFO L480 AbstractCegarLoop]: Abstraction has 4977 states and 5833 transitions. [2018-11-12 16:31:55,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:31:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4977 states and 5833 transitions. [2018-11-12 16:31:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2018-11-12 16:31:55,331 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:31:55,332 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:31:55,332 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:31:55,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:55,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1721033844, now seen corresponding path program 1 times [2018-11-12 16:31:55,333 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:31:55,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:55,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:31:55,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:31:55,334 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:31:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:31:56,082 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:31:56,277 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:31:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 468 proven. 767 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-11-12 16:31:57,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:31:57,704 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:31:57,704 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 739 with the following transitions: [2018-11-12 16:31:57,704 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [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], [750], [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], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:31:57,707 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:31:57,707 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:31:57,922 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:31:58,755 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:31:58,755 INFO L272 AbstractInterpreter]: Visited 185 different actions 926 times. Merged at 9 different actions 45 times. Never widened. Performed 11054 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11054 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 11 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:31:58,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:31:58,762 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:31:59,821 INFO L227 lantSequenceWeakener]: Weakened 51 states. On average, predicates are now at 78.93% of their original sizes. [2018-11-12 16:31:59,821 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:00,222 INFO L415 sIntCurrentIteration]: We unified 737 AI predicates to 737 [2018-11-12 16:32:00,222 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:00,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:00,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-12 16:32:00,223 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:00,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:32:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:32:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:32:00,224 INFO L87 Difference]: Start difference. First operand 4977 states and 5833 transitions. Second operand 20 states. [2018-11-12 16:32:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:16,440 INFO L93 Difference]: Finished difference Result 11474 states and 13722 transitions. [2018-11-12 16:32:16,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 16:32:16,441 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 738 [2018-11-12 16:32:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:16,469 INFO L225 Difference]: With dead ends: 11474 [2018-11-12 16:32:16,469 INFO L226 Difference]: Without dead ends: 7058 [2018-11-12 16:32:16,486 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 752 GetRequests, 719 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-11-12 16:32:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7058 states. [2018-11-12 16:32:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7058 to 6927. [2018-11-12 16:32:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6927 states. [2018-11-12 16:32:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 7875 transitions. [2018-11-12 16:32:16,640 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 7875 transitions. Word has length 738 [2018-11-12 16:32:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:16,641 INFO L480 AbstractCegarLoop]: Abstraction has 6927 states and 7875 transitions. [2018-11-12 16:32:16,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:32:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 7875 transitions. [2018-11-12 16:32:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2018-11-12 16:32:16,654 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:16,655 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:16,655 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:16,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1644735688, now seen corresponding path program 1 times [2018-11-12 16:32:16,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:16,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:16,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:16,657 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:17,348 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:32:17,552 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:32:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 468 proven. 767 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-11-12 16:32:19,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:19,398 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:19,398 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 745 with the following transitions: [2018-11-12 16:32:19,398 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [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], [750], [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 16:32:19,401 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:19,401 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:19,552 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:20,383 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:20,383 INFO L272 AbstractInterpreter]: Visited 192 different actions 1161 times. Merged at 10 different actions 69 times. Widened at 1 different actions 3 times. Performed 13836 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13836 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 16 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:32:20,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:20,390 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:20,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:20,390 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 16:32:20,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:20,399 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:20,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 927 proven. 2 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2018-11-12 16:32:21,315 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 589 proven. 74 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2018-11-12 16:32:22,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:22,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 20 [2018-11-12 16:32:22,220 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:22,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:32:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:32:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:32:22,222 INFO L87 Difference]: Start difference. First operand 6927 states and 7875 transitions. Second operand 18 states. [2018-11-12 16:32:25,664 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2018-11-12 16:32:25,834 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2018-11-12 16:32:26,562 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2018-11-12 16:32:31,578 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2018-11-12 16:32:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:32,203 INFO L93 Difference]: Finished difference Result 17912 states and 21446 transitions. [2018-11-12 16:32:32,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-12 16:32:32,203 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 744 [2018-11-12 16:32:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:32,242 INFO L225 Difference]: With dead ends: 17912 [2018-11-12 16:32:32,243 INFO L226 Difference]: Without dead ends: 11178 [2018-11-12 16:32:32,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1586 GetRequests, 1511 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=917, Invalid=3775, Unknown=0, NotChecked=0, Total=4692 [2018-11-12 16:32:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11178 states. [2018-11-12 16:32:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11178 to 10467. [2018-11-12 16:32:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10467 states. [2018-11-12 16:32:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 12147 transitions. [2018-11-12 16:32:32,473 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 12147 transitions. Word has length 744 [2018-11-12 16:32:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:32,474 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 12147 transitions. [2018-11-12 16:32:32,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:32:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 12147 transitions. [2018-11-12 16:32:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2018-11-12 16:32:32,487 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:32,488 INFO L375 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 16:32:32,488 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:32,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash -354100163, now seen corresponding path program 1 times [2018-11-12 16:32:32,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:32,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:32,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:32,490 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:33,685 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-12 16:32:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 629 proven. 677 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2018-11-12 16:32:35,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:35,365 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:35,366 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 778 with the following transitions: [2018-11-12 16:32:35,366 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [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], [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 16:32:35,368 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:35,369 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:35,524 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:32:36,402 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:32:36,403 INFO L272 AbstractInterpreter]: Visited 193 different actions 1173 times. Merged at 11 different actions 75 times. Widened at 1 different actions 2 times. Performed 14142 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14142 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 16:32:36,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:36,411 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:32:36,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:36,411 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 16:32:36,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:36,421 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:32:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:36,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:32:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 960 proven. 2 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2018-11-12 16:32:37,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:32:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 622 proven. 74 refuted. 0 times theorem prover too weak. 944 trivial. 0 not checked. [2018-11-12 16:32:38,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:32:38,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 22 [2018-11-12 16:32:38,357 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:32:38,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 16:32:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 16:32:38,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2018-11-12 16:32:38,360 INFO L87 Difference]: Start difference. First operand 10467 states and 12147 transitions. Second operand 20 states. [2018-11-12 16:32:40,862 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2018-11-12 16:32:44,691 WARN L179 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2018-11-12 16:32:49,151 WARN L179 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-12 16:32:51,407 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2018-11-12 16:32:51,891 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-12 16:32:55,073 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2018-11-12 16:32:55,946 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 12 [2018-11-12 16:32:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:59,932 INFO L93 Difference]: Finished difference Result 28912 states and 36050 transitions. [2018-11-12 16:32:59,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-11-12 16:32:59,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 777 [2018-11-12 16:32:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:59,994 INFO L225 Difference]: With dead ends: 28912 [2018-11-12 16:32:59,994 INFO L226 Difference]: Without dead ends: 19012 [2018-11-12 16:33:00,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1785 GetRequests, 1647 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2441, Invalid=15649, Unknown=0, NotChecked=0, Total=18090 [2018-11-12 16:33:00,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19012 states. [2018-11-12 16:33:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19012 to 18539. [2018-11-12 16:33:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18539 states. [2018-11-12 16:33:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18539 states to 18539 states and 21807 transitions. [2018-11-12 16:33:00,406 INFO L78 Accepts]: Start accepts. Automaton has 18539 states and 21807 transitions. Word has length 777 [2018-11-12 16:33:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:00,407 INFO L480 AbstractCegarLoop]: Abstraction has 18539 states and 21807 transitions. [2018-11-12 16:33:00,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 16:33:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18539 states and 21807 transitions. [2018-11-12 16:33:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2018-11-12 16:33:00,429 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:00,430 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1] [2018-11-12 16:33:00,430 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:00,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash 548253286, now seen corresponding path program 1 times [2018-11-12 16:33:00,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:00,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:00,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:00,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:00,432 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:01,274 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:01,470 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:01,685 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:02,004 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 16:33:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 530 proven. 1270 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2018-11-12 16:33:04,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:04,181 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:04,181 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 953 with the following transitions: [2018-11-12 16:33:04,181 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [85], [87], [90], [98], [106], [114], [122], [130], [138], [146], [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], [514], [515], [519], [522], [523], [527], [531], [534], [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], [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 16:33:04,184 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:04,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:04,470 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:05,328 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:33:05,329 INFO L272 AbstractInterpreter]: Visited 195 different actions 1187 times. Merged at 12 different actions 77 times. Widened at 1 different actions 3 times. Performed 15407 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15407 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 26 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:33:05,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:05,336 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:33:05,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:05,336 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 16:33:05,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:05,346 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:33:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:05,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:33:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2018-11-12 16:33:06,417 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:33:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 669 proven. 2 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2018-11-12 16:33:07,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:33:07,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:33:07,933 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:33:07,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:33:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:33:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:33:07,936 INFO L87 Difference]: Start difference. First operand 18539 states and 21807 transitions. Second operand 18 states. Received shutdown request... [2018-11-12 16:33:10,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:33:10,692 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:33:10,697 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:33:10,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:33:10 BoogieIcfgContainer [2018-11-12 16:33:10,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:33:10,699 INFO L168 Benchmark]: Toolchain (without parser) took 220366.94 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:10,700 INFO L168 Benchmark]: CDTParser took 0.22 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 16:33:10,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 837.92 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 16:33:10,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 137.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:10,702 INFO L168 Benchmark]: Boogie Preprocessor took 106.07 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:33:10,703 INFO L168 Benchmark]: RCFGBuilder took 3669.31 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 131.4 MB). Peak memory consumption was 131.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:33:10,703 INFO L168 Benchmark]: TraceAbstraction took 215609.51 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-11-12 16:33:10,710 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 837.92 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 137.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -811.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.07 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3669.31 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 131.4 MB). Peak memory consumption was 131.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 215609.51 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.2 GB). Free memory was 2.1 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 52). Cancelled while BasicCegarLoop was constructing difference of abstraction (18539states) and FLOYD_HOARE automaton (currently 17 states, 18 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 33 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 215.5s OverallTime, 12 OverallIterations, 9 TraceHistogramMax, 165.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2067 SDtfs, 36572 SDslu, 4615 SDs, 0 SdLazy, 45481 SolverSat, 6013 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.2s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 8882 GetRequests, 8278 SyntacticMatches, 137 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11529 ImplicationChecksByTransitivity, 31.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18539occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 6.9s AbstIntTime, 10 AbstIntIterations, 6 AbstIntStrong, 0.9970174693664384 AbsIntWeakeningRatio, 0.0903387703889586 AbsIntAvgWeakeningVarsNumRemoved, 15.327059807611878 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 2358 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 8514 NumberOfCodeBlocks, 8514 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 11473 ConstructedInterpolants, 0 QuantifiedInterpolants, 49495668 SizeOfPredicates, 11 NumberOfNonLiveVariables, 4354 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 19050/24114 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown