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/Problem11_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:36:19,526 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:36:19,528 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:36:19,540 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:36:19,541 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:36:19,542 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:36:19,543 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:36:19,545 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:36:19,547 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:36:19,548 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:36:19,549 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:36:19,549 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:36:19,550 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:36:19,551 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:36:19,553 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:36:19,553 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:36:19,554 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:36:19,556 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:36:19,559 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:36:19,560 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:36:19,562 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:36:19,563 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:36:19,566 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:36:19,566 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:36:19,567 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:36:19,568 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:36:19,569 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:36:19,570 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:36:19,571 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:36:19,572 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:36:19,573 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:36:19,577 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:36:19,577 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:36:19,577 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:36:19,584 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:36:19,585 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:36:19,585 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 18:36:19,604 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:36:19,605 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:36:19,605 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:36:19,606 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:36:19,606 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:36:19,606 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:36:19,606 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:36:19,606 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:36:19,607 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:36:19,607 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:36:19,607 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:36:19,607 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:36:19,607 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:36:19,608 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:36:19,608 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:36:19,609 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:36:19,609 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:36:19,609 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:36:19,609 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:36:19,609 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:36:19,610 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:36:19,610 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:36:19,610 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:36:19,610 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:36:19,610 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:36:19,611 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:36:19,611 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:36:19,611 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:36:19,611 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:36:19,611 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:36:19,612 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:36:19,612 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:36:19,613 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:36:19,613 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:36:19,613 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:36:19,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:36:19,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:36:19,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:36:19,709 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:36:19,710 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:36:19,710 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17_true-unreach-call.c [2018-11-12 18:36:19,785 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/182d51366/4f466a8a52b045f4929575c8dda24f8b/FLAGb580dd1ee [2018-11-12 18:36:20,414 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:36:20,415 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label17_true-unreach-call.c [2018-11-12 18:36:20,433 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/182d51366/4f466a8a52b045f4929575c8dda24f8b/FLAGb580dd1ee [2018-11-12 18:36:20,452 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/182d51366/4f466a8a52b045f4929575c8dda24f8b [2018-11-12 18:36:20,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:36:20,468 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:36:20,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:36:20,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:36:20,476 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:36:20,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:36:20" (1/1) ... [2018-11-12 18:36:20,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3941df6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:20, skipping insertion in model container [2018-11-12 18:36:20,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:36:20" (1/1) ... [2018-11-12 18:36:20,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:36:20,561 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:36:21,249 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:36:21,254 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:36:21,422 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:36:21,446 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:36:21,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21 WrapperNode [2018-11-12 18:36:21,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:36:21,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:36:21,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:36:21,449 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:36:21,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:36:21,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:36:21,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:36:21,617 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:36:21,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (1/1) ... [2018-11-12 18:36:21,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:36:21,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:36:21,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:36:21,744 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:36:21,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (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 18:36:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:36:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:36:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:36:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:36:21,820 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:36:21,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:36:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:36:21,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:36:21,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:36:26,175 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:36:26,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:36:26 BoogieIcfgContainer [2018-11-12 18:36:26,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:36:26,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:36:26,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:36:26,181 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:36:26,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:36:20" (1/3) ... [2018-11-12 18:36:26,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143a5e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:36:26, skipping insertion in model container [2018-11-12 18:36:26,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:36:21" (2/3) ... [2018-11-12 18:36:26,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143a5e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:36:26, skipping insertion in model container [2018-11-12 18:36:26,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:36:26" (3/3) ... [2018-11-12 18:36:26,185 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label17_true-unreach-call.c [2018-11-12 18:36:26,195 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:36:26,205 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:36:26,224 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:36:26,268 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:36:26,268 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:36:26,268 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:36:26,268 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:36:26,268 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:36:26,269 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:36:26,269 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:36:26,269 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:36:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:36:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-12 18:36:26,310 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:26,312 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:26,314 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:26,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1654755049, now seen corresponding path program 1 times [2018-11-12 18:36:26,324 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:26,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:26,384 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:26,816 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:36:26,933 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 18:36:26,936 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:36:26,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 18:36:26,936 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:36:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:36:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:36:26,962 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 3 states. [2018-11-12 18:36:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:29,132 INFO L93 Difference]: Finished difference Result 790 states and 1382 transitions. [2018-11-12 18:36:29,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:36:29,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2018-11-12 18:36:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:29,156 INFO L225 Difference]: With dead ends: 790 [2018-11-12 18:36:29,157 INFO L226 Difference]: Without dead ends: 495 [2018-11-12 18:36:29,164 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:36:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-12 18:36:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2018-11-12 18:36:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-11-12 18:36:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 849 transitions. [2018-11-12 18:36:29,270 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 849 transitions. Word has length 45 [2018-11-12 18:36:29,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:29,271 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 849 transitions. [2018-11-12 18:36:29,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:36:29,271 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 849 transitions. [2018-11-12 18:36:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-12 18:36:29,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:29,279 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:36:29,279 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:29,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash -5486104, now seen corresponding path program 1 times [2018-11-12 18:36:29,280 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:29,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:29,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:29,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:29,283 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:29,621 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:36:29,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 18:36:29,622 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:29,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 18:36:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 18:36:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 18:36:29,626 INFO L87 Difference]: Start difference. First operand 488 states and 849 transitions. Second operand 5 states. [2018-11-12 18:36:35,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:35,093 INFO L93 Difference]: Finished difference Result 1731 states and 3162 transitions. [2018-11-12 18:36:35,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 18:36:35,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2018-11-12 18:36:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:35,107 INFO L225 Difference]: With dead ends: 1731 [2018-11-12 18:36:35,107 INFO L226 Difference]: Without dead ends: 1249 [2018-11-12 18:36:35,113 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:36:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2018-11-12 18:36:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1032. [2018-11-12 18:36:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2018-11-12 18:36:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1658 transitions. [2018-11-12 18:36:35,177 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1658 transitions. Word has length 121 [2018-11-12 18:36:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:35,177 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 1658 transitions. [2018-11-12 18:36:35,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 18:36:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1658 transitions. [2018-11-12 18:36:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-12 18:36:35,182 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:35,182 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:36:35,183 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:35,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -423386729, now seen corresponding path program 1 times [2018-11-12 18:36:35,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:35,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:35,185 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:35,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:35,185 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:35,504 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:36:35,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 18:36:35,504 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:35,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 18:36:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 18:36:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 18:36:35,506 INFO L87 Difference]: Start difference. First operand 1032 states and 1658 transitions. Second operand 5 states. [2018-11-12 18:36:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:39,419 INFO L93 Difference]: Finished difference Result 3664 states and 6086 transitions. [2018-11-12 18:36:39,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 18:36:39,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2018-11-12 18:36:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:39,439 INFO L225 Difference]: With dead ends: 3664 [2018-11-12 18:36:39,439 INFO L226 Difference]: Without dead ends: 2638 [2018-11-12 18:36:39,446 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:36:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2018-11-12 18:36:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2605. [2018-11-12 18:36:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2605 states. [2018-11-12 18:36:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 3729 transitions. [2018-11-12 18:36:39,537 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 3729 transitions. Word has length 132 [2018-11-12 18:36:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:39,537 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 3729 transitions. [2018-11-12 18:36:39,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 18:36:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 3729 transitions. [2018-11-12 18:36:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-12 18:36:39,544 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:39,548 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:36:39,548 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:39,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1552929811, now seen corresponding path program 1 times [2018-11-12 18:36:39,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:39,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:39,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:39,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:39,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:36:39,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:39,949 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:39,950 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2018-11-12 18:36:39,952 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:40,008 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:40,008 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:40,715 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:42,171 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:36:42,173 INFO L272 AbstractInterpreter]: Visited 139 different actions 404 times. Merged at 5 different actions 9 times. Never widened. Performed 6187 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6187 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:36:42,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:42,220 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:36:42,992 INFO L227 lantSequenceWeakener]: Weakened 174 states. On average, predicates are now at 73.58% of their original sizes. [2018-11-12 18:36:42,992 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:36:44,379 INFO L415 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2018-11-12 18:36:44,380 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:36:44,381 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:36:44,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2018-11-12 18:36:44,381 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:36:44,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-12 18:36:44,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-12 18:36:44,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-12 18:36:44,383 INFO L87 Difference]: Start difference. First operand 2605 states and 3729 transitions. Second operand 13 states. [2018-11-12 18:37:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:17,725 INFO L93 Difference]: Finished difference Result 5789 states and 8293 transitions. [2018-11-12 18:37:17,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:37:17,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 177 [2018-11-12 18:37:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:17,741 INFO L225 Difference]: With dead ends: 5789 [2018-11-12 18:37:17,741 INFO L226 Difference]: Without dead ends: 3190 [2018-11-12 18:37:17,750 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-12 18:37:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2018-11-12 18:37:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3184. [2018-11-12 18:37:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2018-11-12 18:37:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4341 transitions. [2018-11-12 18:37:17,829 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4341 transitions. Word has length 177 [2018-11-12 18:37:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:17,830 INFO L480 AbstractCegarLoop]: Abstraction has 3184 states and 4341 transitions. [2018-11-12 18:37:17,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-12 18:37:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4341 transitions. [2018-11-12 18:37:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-12 18:37:17,835 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:17,836 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:17,836 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:17,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1236143779, now seen corresponding path program 1 times [2018-11-12 18:37:17,837 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:17,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:17,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:17,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:17,838 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:19,025 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-12 18:37:19,201 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:37:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:37:19,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:19,967 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:19,968 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 252 with the following transitions: [2018-11-12 18:37:19,968 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [570], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:19,976 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:19,977 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:20,158 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:20,867 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:37:20,867 INFO L272 AbstractInterpreter]: Visited 125 different actions 613 times. Merged at 7 different actions 32 times. Widened at 1 different actions 1 times. Performed 10231 root evaluator evaluations with a maximum evaluation depth of 6. Performed 10231 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:37:20,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:20,874 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:37:21,314 INFO L227 lantSequenceWeakener]: Weakened 248 states. On average, predicates are now at 73.42% of their original sizes. [2018-11-12 18:37:21,314 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:37:21,738 INFO L415 sIntCurrentIteration]: We unified 250 AI predicates to 250 [2018-11-12 18:37:21,739 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:37:21,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:37:21,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2018-11-12 18:37:21,739 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:21,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:37:21,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:37:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:37:21,741 INFO L87 Difference]: Start difference. First operand 3184 states and 4341 transitions. Second operand 11 states. [2018-11-12 18:37:34,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:34,281 INFO L93 Difference]: Finished difference Result 8238 states and 12117 transitions. [2018-11-12 18:37:34,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:37:34,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 251 [2018-11-12 18:37:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:34,308 INFO L225 Difference]: With dead ends: 8238 [2018-11-12 18:37:34,309 INFO L226 Difference]: Without dead ends: 5639 [2018-11-12 18:37:34,322 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:37:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2018-11-12 18:37:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4717. [2018-11-12 18:37:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4717 states. [2018-11-12 18:37:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 6298 transitions. [2018-11-12 18:37:34,456 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 6298 transitions. Word has length 251 [2018-11-12 18:37:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:34,456 INFO L480 AbstractCegarLoop]: Abstraction has 4717 states and 6298 transitions. [2018-11-12 18:37:34,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:37:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 6298 transitions. [2018-11-12 18:37:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-12 18:37:34,464 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:34,464 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:34,465 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:34,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 35307631, now seen corresponding path program 1 times [2018-11-12 18:37:34,465 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:34,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:34,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:34,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:34,472 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:34,916 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-12 18:37:35,115 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-12 18:37:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:37:35,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:35,811 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:35,811 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 262 with the following transitions: [2018-11-12 18:37:35,812 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [570], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:35,816 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:35,816 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:35,980 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:36,948 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:37:36,949 INFO L272 AbstractInterpreter]: Visited 135 different actions 790 times. Merged at 7 different actions 35 times. Widened at 1 different actions 1 times. Performed 13731 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13731 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:37:36,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:36,955 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:37:37,351 INFO L227 lantSequenceWeakener]: Weakened 258 states. On average, predicates are now at 73.41% of their original sizes. [2018-11-12 18:37:37,351 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:37:37,495 INFO L415 sIntCurrentIteration]: We unified 260 AI predicates to 260 [2018-11-12 18:37:37,495 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:37:37,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:37:37,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2018-11-12 18:37:37,495 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:37,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:37:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:37:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:37:37,496 INFO L87 Difference]: Start difference. First operand 4717 states and 6298 transitions. Second operand 11 states. [2018-11-12 18:37:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:53,728 INFO L93 Difference]: Finished difference Result 11564 states and 16394 transitions. [2018-11-12 18:37:53,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:37:53,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 261 [2018-11-12 18:37:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:53,767 INFO L225 Difference]: With dead ends: 11564 [2018-11-12 18:37:53,767 INFO L226 Difference]: Without dead ends: 8965 [2018-11-12 18:37:53,781 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 270 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:37:53,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8965 states. [2018-11-12 18:37:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8965 to 7492. [2018-11-12 18:37:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7492 states. [2018-11-12 18:37:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7492 states to 7492 states and 9866 transitions. [2018-11-12 18:37:53,974 INFO L78 Accepts]: Start accepts. Automaton has 7492 states and 9866 transitions. Word has length 261 [2018-11-12 18:37:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:53,975 INFO L480 AbstractCegarLoop]: Abstraction has 7492 states and 9866 transitions. [2018-11-12 18:37:53,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:37:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 7492 states and 9866 transitions. [2018-11-12 18:37:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-11-12 18:37:53,984 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:53,984 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:37:53,985 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:53,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 69007426, now seen corresponding path program 1 times [2018-11-12 18:37:53,985 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:53,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:53,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:53,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:53,987 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 71 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:37:54,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:54,584 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:54,584 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 283 with the following transitions: [2018-11-12 18:37:54,584 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [570], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:54,588 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:54,588 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:54,715 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:55,784 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:37:55,784 INFO L272 AbstractInterpreter]: Visited 157 different actions 768 times. Merged at 7 different actions 29 times. Never widened. Performed 13913 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13913 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:37:55,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:55,791 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:37:55,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:55,791 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 18:37:56,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:56,403 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:37:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:56,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:37:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-12 18:37:56,620 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:37:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-12 18:37:56,997 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:37:56,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 8 [2018-11-12 18:37:56,997 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:56,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:37:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:37:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:37:56,999 INFO L87 Difference]: Start difference. First operand 7492 states and 9866 transitions. Second operand 3 states. [2018-11-12 18:37:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:58,579 INFO L93 Difference]: Finished difference Result 11660 states and 16230 transitions. [2018-11-12 18:37:58,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:37:58,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2018-11-12 18:37:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:58,604 INFO L225 Difference]: With dead ends: 11660 [2018-11-12 18:37:58,605 INFO L226 Difference]: Without dead ends: 5327 [2018-11-12 18:37:58,637 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 566 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:37:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2018-11-12 18:37:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 5130. [2018-11-12 18:37:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5130 states. [2018-11-12 18:37:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 6837 transitions. [2018-11-12 18:37:58,777 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 6837 transitions. Word has length 282 [2018-11-12 18:37:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:58,778 INFO L480 AbstractCegarLoop]: Abstraction has 5130 states and 6837 transitions. [2018-11-12 18:37:58,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:37:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 6837 transitions. [2018-11-12 18:37:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-11-12 18:37:58,792 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:58,792 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:37:58,793 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:58,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1614467490, now seen corresponding path program 1 times [2018-11-12 18:37:58,793 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:58,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:58,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:58,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:58,797 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 275 proven. 78 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 18:37:59,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:59,561 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:59,561 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 328 with the following transitions: [2018-11-12 18:37:59,562 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:59,565 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:59,565 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:59,673 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:00,035 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:38:00,036 INFO L272 AbstractInterpreter]: Visited 126 different actions 497 times. Merged at 7 different actions 26 times. Never widened. Performed 6664 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6664 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:38:00,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:00,046 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:38:00,409 INFO L227 lantSequenceWeakener]: Weakened 324 states. On average, predicates are now at 73.37% of their original sizes. [2018-11-12 18:38:00,410 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:38:00,781 INFO L415 sIntCurrentIteration]: We unified 326 AI predicates to 326 [2018-11-12 18:38:00,781 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:38:00,782 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:38:00,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:38:00,782 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:00,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:38:00,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:38:00,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:38:00,784 INFO L87 Difference]: Start difference. First operand 5130 states and 6837 transitions. Second operand 11 states. [2018-11-12 18:38:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:12,935 INFO L93 Difference]: Finished difference Result 11573 states and 16056 transitions. [2018-11-12 18:38:12,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:38:12,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 327 [2018-11-12 18:38:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:12,956 INFO L225 Difference]: With dead ends: 11573 [2018-11-12 18:38:12,956 INFO L226 Difference]: Without dead ends: 6831 [2018-11-12 18:38:12,972 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 336 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:38:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2018-11-12 18:38:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 6614. [2018-11-12 18:38:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6614 states. [2018-11-12 18:38:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6614 states to 6614 states and 8563 transitions. [2018-11-12 18:38:13,104 INFO L78 Accepts]: Start accepts. Automaton has 6614 states and 8563 transitions. Word has length 327 [2018-11-12 18:38:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:13,105 INFO L480 AbstractCegarLoop]: Abstraction has 6614 states and 8563 transitions. [2018-11-12 18:38:13,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:38:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6614 states and 8563 transitions. [2018-11-12 18:38:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2018-11-12 18:38:13,117 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:13,117 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:38:13,117 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:13,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1471700502, now seen corresponding path program 1 times [2018-11-12 18:38:13,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:13,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:13,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:13,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:13,119 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 18:38:13,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:13,842 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:13,843 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 332 with the following transitions: [2018-11-12 18:38:13,843 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:13,846 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:13,847 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:13,965 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:14,513 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:38:14,514 INFO L272 AbstractInterpreter]: Visited 126 different actions 497 times. Merged at 7 different actions 26 times. Never widened. Performed 6848 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6848 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:38:14,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:14,523 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:38:17,779 INFO L227 lantSequenceWeakener]: Weakened 328 states. On average, predicates are now at 75.26% of their original sizes. [2018-11-12 18:38:17,780 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:38:17,866 INFO L415 sIntCurrentIteration]: We unified 330 AI predicates to 330 [2018-11-12 18:38:17,867 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:38:17,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:38:17,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-12 18:38:17,867 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:17,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:38:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:38:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:38:17,869 INFO L87 Difference]: Start difference. First operand 6614 states and 8563 transitions. Second operand 10 states. [2018-11-12 18:38:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:30,422 INFO L93 Difference]: Finished difference Result 11389 states and 15589 transitions. [2018-11-12 18:38:30,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:38:30,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 331 [2018-11-12 18:38:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:30,449 INFO L225 Difference]: With dead ends: 11389 [2018-11-12 18:38:30,450 INFO L226 Difference]: Without dead ends: 8190 [2018-11-12 18:38:30,465 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 337 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-12 18:38:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2018-11-12 18:38:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 8122. [2018-11-12 18:38:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8122 states. [2018-11-12 18:38:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 10364 transitions. [2018-11-12 18:38:30,636 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 10364 transitions. Word has length 331 [2018-11-12 18:38:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:30,636 INFO L480 AbstractCegarLoop]: Abstraction has 8122 states and 10364 transitions. [2018-11-12 18:38:30,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:38:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 10364 transitions. [2018-11-12 18:38:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-11-12 18:38:30,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:30,652 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:38:30,652 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:30,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -525676178, now seen corresponding path program 1 times [2018-11-12 18:38:30,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:30,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:30,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:30,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:30,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 275 proven. 78 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-12 18:38:31,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:31,295 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:31,295 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 338 with the following transitions: [2018-11-12 18:38:31,295 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [538], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:31,298 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:31,298 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:31,392 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:31,976 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:38:31,976 INFO L272 AbstractInterpreter]: Visited 136 different actions 665 times. Merged at 7 different actions 29 times. Never widened. Performed 9458 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9458 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:38:31,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:31,983 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:38:32,362 INFO L227 lantSequenceWeakener]: Weakened 334 states. On average, predicates are now at 73.36% of their original sizes. [2018-11-12 18:38:32,362 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:38:32,469 INFO L415 sIntCurrentIteration]: We unified 336 AI predicates to 336 [2018-11-12 18:38:32,470 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:38:32,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:38:32,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:38:32,470 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:32,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:38:32,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:38:32,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:38:32,471 INFO L87 Difference]: Start difference. First operand 8122 states and 10364 transitions. Second operand 11 states. [2018-11-12 18:38:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:52,230 INFO L93 Difference]: Finished difference Result 16746 states and 22353 transitions. [2018-11-12 18:38:52,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:38:52,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 337 [2018-11-12 18:38:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:52,260 INFO L225 Difference]: With dead ends: 16746 [2018-11-12 18:38:52,260 INFO L226 Difference]: Without dead ends: 12037 [2018-11-12 18:38:52,271 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 346 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:38:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12037 states. [2018-11-12 18:38:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12037 to 11258. [2018-11-12 18:38:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11258 states. [2018-11-12 18:38:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11258 states to 11258 states and 14125 transitions. [2018-11-12 18:38:52,477 INFO L78 Accepts]: Start accepts. Automaton has 11258 states and 14125 transitions. Word has length 337 [2018-11-12 18:38:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:52,478 INFO L480 AbstractCegarLoop]: Abstraction has 11258 states and 14125 transitions. [2018-11-12 18:38:52,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:38:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 11258 states and 14125 transitions. [2018-11-12 18:38:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-11-12 18:38:52,496 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:52,496 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:38:52,496 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:52,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:52,497 INFO L82 PathProgramCache]: Analyzing trace with hash -708240591, now seen corresponding path program 1 times [2018-11-12 18:38:52,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:52,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:52,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:52,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:52,498 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 190 proven. 72 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 18:38:53,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:53,074 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:53,074 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 351 with the following transitions: [2018-11-12 18:38:53,074 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:53,078 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:53,079 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:53,217 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:54,005 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:38:54,006 INFO L272 AbstractInterpreter]: Visited 157 different actions 458 times. Merged at 5 different actions 9 times. Never widened. Performed 8649 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8649 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:38:54,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:54,045 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:38:55,631 INFO L227 lantSequenceWeakener]: Weakened 74 states. On average, predicates are now at 74.92% of their original sizes. [2018-11-12 18:38:55,631 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:38:56,283 INFO L415 sIntCurrentIteration]: We unified 349 AI predicates to 349 [2018-11-12 18:38:56,283 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:38:56,283 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:38:56,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-12 18:38:56,284 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:38:56,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 18:38:56,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 18:38:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2018-11-12 18:38:56,285 INFO L87 Difference]: Start difference. First operand 11258 states and 14125 transitions. Second operand 22 states. [2018-11-12 18:39:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:25,893 INFO L93 Difference]: Finished difference Result 19805 states and 25216 transitions. [2018-11-12 18:39:25,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-12 18:39:25,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 350 [2018-11-12 18:39:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:25,924 INFO L225 Difference]: With dead ends: 19805 [2018-11-12 18:39:25,924 INFO L226 Difference]: Without dead ends: 12052 [2018-11-12 18:39:25,934 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 369 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2018-11-12 18:39:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2018-11-12 18:39:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12035. [2018-11-12 18:39:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12035 states. [2018-11-12 18:39:26,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12035 states to 12035 states and 15005 transitions. [2018-11-12 18:39:26,142 INFO L78 Accepts]: Start accepts. Automaton has 12035 states and 15005 transitions. Word has length 350 [2018-11-12 18:39:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:26,143 INFO L480 AbstractCegarLoop]: Abstraction has 12035 states and 15005 transitions. [2018-11-12 18:39:26,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 18:39:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 12035 states and 15005 transitions. [2018-11-12 18:39:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-11-12 18:39:26,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:26,164 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:39:26,164 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:26,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1425164005, now seen corresponding path program 1 times [2018-11-12 18:39:26,165 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:26,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:26,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:26,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:26,166 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:39:26,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:26,492 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:26,492 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 354 with the following transitions: [2018-11-12 18:39:26,492 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [582], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:26,495 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:26,495 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:26,577 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:28,264 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:39:28,265 INFO L272 AbstractInterpreter]: Visited 142 different actions 843 times. Merged at 8 different actions 48 times. Widened at 1 different actions 1 times. Performed 13991 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13991 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:39:28,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:28,271 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:39:28,271 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:28,271 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 18:39:28,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:28,280 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:39:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:28,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:39:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:39:28,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:39:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:39:28,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:39:28,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-12 18:39:28,746 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:39:28,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:39:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:39:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:39:28,747 INFO L87 Difference]: Start difference. First operand 12035 states and 15005 transitions. Second operand 7 states. [2018-11-12 18:39:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:30,988 INFO L93 Difference]: Finished difference Result 15254 states and 19637 transitions. [2018-11-12 18:39:30,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:39:30,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 353 [2018-11-12 18:39:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:31,014 INFO L225 Difference]: With dead ends: 15254 [2018-11-12 18:39:31,014 INFO L226 Difference]: Without dead ends: 12055 [2018-11-12 18:39:31,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 706 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:39:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12055 states. [2018-11-12 18:39:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12055 to 11980. [2018-11-12 18:39:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11980 states. [2018-11-12 18:39:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11980 states to 11980 states and 14395 transitions. [2018-11-12 18:39:31,219 INFO L78 Accepts]: Start accepts. Automaton has 11980 states and 14395 transitions. Word has length 353 [2018-11-12 18:39:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:31,220 INFO L480 AbstractCegarLoop]: Abstraction has 11980 states and 14395 transitions. [2018-11-12 18:39:31,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:39:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11980 states and 14395 transitions. [2018-11-12 18:39:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2018-11-12 18:39:31,240 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:31,240 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:39:31,241 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:31,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash 876593640, now seen corresponding path program 1 times [2018-11-12 18:39:31,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:31,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:31,242 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 206 proven. 88 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-12 18:39:31,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:31,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:31,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 357 with the following transitions: [2018-11-12 18:39:31,847 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [570], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:31,850 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:31,850 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:31,925 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:32,607 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:39:32,608 INFO L272 AbstractInterpreter]: Visited 126 different actions 626 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 9350 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9350 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:39:32,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:32,617 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:39:33,437 INFO L227 lantSequenceWeakener]: Weakened 353 states. On average, predicates are now at 75.3% of their original sizes. [2018-11-12 18:39:33,438 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:39:33,532 INFO L415 sIntCurrentIteration]: We unified 355 AI predicates to 355 [2018-11-12 18:39:33,532 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:39:33,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:39:33,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2018-11-12 18:39:33,533 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:39:33,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:39:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:39:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:39:33,534 INFO L87 Difference]: Start difference. First operand 11980 states and 14395 transitions. Second operand 10 states. [2018-11-12 18:39:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:42,154 INFO L93 Difference]: Finished difference Result 31590 states and 38619 transitions. [2018-11-12 18:39:42,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:39:42,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 356 [2018-11-12 18:39:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:42,208 INFO L225 Difference]: With dead ends: 31590 [2018-11-12 18:39:42,208 INFO L226 Difference]: Without dead ends: 23472 [2018-11-12 18:39:42,232 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 363 GetRequests, 347 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 18:39:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23472 states. [2018-11-12 18:39:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23472 to 21626. [2018-11-12 18:39:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21626 states. [2018-11-12 18:39:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 25377 transitions. [2018-11-12 18:39:42,591 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 25377 transitions. Word has length 356 [2018-11-12 18:39:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:42,592 INFO L480 AbstractCegarLoop]: Abstraction has 21626 states and 25377 transitions. [2018-11-12 18:39:42,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:39:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 25377 transitions. [2018-11-12 18:39:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-11-12 18:39:42,615 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:42,616 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:39:42,616 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:42,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1057039261, now seen corresponding path program 1 times [2018-11-12 18:39:42,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:42,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:42,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:42,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:42,618 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 291 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-12 18:39:43,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:43,008 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:43,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 358 with the following transitions: [2018-11-12 18:39:43,009 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [582], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:43,011 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:43,012 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:43,119 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:44,022 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:39:44,023 INFO L272 AbstractInterpreter]: Visited 142 different actions 706 times. Merged at 8 different actions 42 times. Widened at 1 different actions 1 times. Performed 11511 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11511 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:39:44,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:44,029 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:39:44,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:44,029 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 18:39:44,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:44,038 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:39:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:44,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:39:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 126 proven. 4 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 18:39:44,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:39:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 126 proven. 170 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-11-12 18:39:45,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:39:45,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 16 [2018-11-12 18:39:45,249 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:39:45,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:39:45,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:39:45,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2018-11-12 18:39:45,250 INFO L87 Difference]: Start difference. First operand 21626 states and 25377 transitions. Second operand 10 states. [2018-11-12 18:39:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:39:51,267 INFO L93 Difference]: Finished difference Result 53145 states and 65017 transitions. [2018-11-12 18:39:51,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 18:39:51,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 357 [2018-11-12 18:39:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:39:51,364 INFO L225 Difference]: With dead ends: 53145 [2018-11-12 18:39:51,364 INFO L226 Difference]: Without dead ends: 29587 [2018-11-12 18:39:51,430 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 710 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2018-11-12 18:39:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29587 states. [2018-11-12 18:39:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29587 to 28505. [2018-11-12 18:39:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28505 states. [2018-11-12 18:39:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28505 states to 28505 states and 34552 transitions. [2018-11-12 18:39:51,996 INFO L78 Accepts]: Start accepts. Automaton has 28505 states and 34552 transitions. Word has length 357 [2018-11-12 18:39:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:39:51,997 INFO L480 AbstractCegarLoop]: Abstraction has 28505 states and 34552 transitions. [2018-11-12 18:39:51,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:39:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28505 states and 34552 transitions. [2018-11-12 18:39:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-11-12 18:39:52,033 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:39:52,034 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 18:39:52,034 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:39:52,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -239957510, now seen corresponding path program 1 times [2018-11-12 18:39:52,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:39:52,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:52,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:52,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:39:52,036 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:39:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 5 proven. 78 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2018-11-12 18:39:52,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:52,677 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:39:52,678 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 361 with the following transitions: [2018-11-12 18:39:52,678 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [261], [263], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [959], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:39:52,681 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:39:52,681 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:39:52,773 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:39:54,218 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:39:54,218 INFO L272 AbstractInterpreter]: Visited 176 different actions 862 times. Merged at 7 different actions 29 times. Never widened. Performed 15977 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15977 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 5 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:39:54,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:39:54,224 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:39:54,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:39:54,224 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 18:39:54,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:39:54,233 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:39:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:39:54,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:39:55,862 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_prenex_2 Int)) (let ((.cse0 (mod (+ v_prenex_2 69157) 299861))) (and (<= |c_old(~a29~0)| v_prenex_2) (= .cse0 0) (<= c_~a29~0 (+ .cse0 300138))))) (exists ((v_prenex_1 Int)) (let ((.cse2 (+ v_prenex_1 69157))) (let ((.cse1 (mod .cse2 299861))) (and (<= c_~a29~0 (+ .cse1 277)) (< .cse2 0) (<= |c_old(~a29~0)| v_prenex_1) (not (= .cse1 0)))))) (exists ((v_~a29~0_549 Int)) (let ((.cse3 (+ v_~a29~0_549 69157))) (and (<= |c_old(~a29~0)| v_~a29~0_549) (<= 0 .cse3) (<= c_~a29~0 (+ (mod .cse3 299861) 300138)))))) is different from true [2018-11-12 18:39:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 5 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2018-11-12 18:39:56,087 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-11-12 18:39:56,146 WARN L187 SmtUtils]: Removed 3 from assertion stack [2018-11-12 18:39:56,146 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-12 18:39:56,347 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:39:56,348 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:39:56,354 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:39:56,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:39:56 BoogieIcfgContainer [2018-11-12 18:39:56,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:39:56,355 INFO L168 Benchmark]: Toolchain (without parser) took 215890.95 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -211.5 MB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-11-12 18:39:56,357 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:39:56,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 978.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:39:56,358 INFO L168 Benchmark]: Boogie Procedure Inliner took 167.65 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -832.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2018-11-12 18:39:56,359 INFO L168 Benchmark]: Boogie Preprocessor took 126.55 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:39:56,359 INFO L168 Benchmark]: RCFGBuilder took 4432.34 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 186.4 MB). Peak memory consumption was 186.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:39:56,360 INFO L168 Benchmark]: TraceAbstraction took 210177.48 ms. Allocated memory was 2.2 GB in the beginning and 4.7 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 370.7 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-12 18:39:56,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 978.35 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 167.65 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -832.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.55 ms. Allocated memory is still 2.2 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 4432.34 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 186.4 MB). Peak memory consumption was 186.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 210177.48 ms. Allocated memory was 2.2 GB in the beginning and 4.7 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.6 GB in the end (delta: 370.7 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 120). Cancelled while BasicCegarLoop was analyzing trace of length 361 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 210.0s OverallTime, 15 OverallIterations, 4 TraceHistogramMax, 166.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3375 SDtfs, 16673 SDslu, 5504 SDs, 0 SdLazy, 29860 SolverSat, 3793 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.5s Time, PredicateUnifierStatistics: 16 DeclaredPredicates, 4512 GetRequests, 4289 SyntacticMatches, 6 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28505occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.4s AbstIntTime, 12 AbstIntIterations, 8 AbstIntStrong, 0.9974881447555146 AbsIntWeakeningRatio, 0.10453400503778337 AbsIntAvgWeakeningVarsNumRemoved, 23.326196473551637 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.6s AutomataMinimizationTime, 14 MinimizatonAttempts, 6939 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 4672 NumberOfCodeBlocks, 4672 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 5644 ConstructedInterpolants, 0 QuantifiedInterpolants, 6519572 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1691 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 4352/5035 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown