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/Problem16_label20_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:13:19,485 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:13:19,487 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:13:19,503 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:13:19,503 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:13:19,505 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:13:19,506 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:13:19,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:13:19,511 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:13:19,512 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:13:19,514 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:13:19,514 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:13:19,515 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:13:19,516 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:13:19,524 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:13:19,527 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:13:19,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:13:19,530 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:13:19,536 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:13:19,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:13:19,541 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:13:19,542 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:13:19,544 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:13:19,545 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:13:19,545 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:13:19,546 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:13:19,548 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:13:19,549 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:13:19,550 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:13:19,551 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:13:19,551 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:13:19,552 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:13:19,552 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:13:19,552 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:13:19,555 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:13:19,556 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:13:19,557 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 [2018-11-07 18:13:19,584 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:13:19,585 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:13:19,585 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:13:19,586 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:13:19,587 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:13:19,587 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:13:19,587 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:13:19,587 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:13:19,587 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:13:19,588 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:13:19,588 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:13:19,588 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:13:19,588 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:13:19,589 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:13:19,590 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:13:19,590 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:13:19,590 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:13:19,590 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:13:19,591 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:13:19,591 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:13:19,591 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:13:19,591 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:13:19,591 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:13:19,592 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:13:19,592 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:13:19,592 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:13:19,592 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:13:19,593 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:13:19,593 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:13:19,593 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:13:19,593 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:13:19,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:13:19,594 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:13:19,594 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:13:19,594 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:13:19,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:13:19,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:13:19,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:13:19,657 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:13:19,658 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:13:19,659 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label20_false-unreach-call.c [2018-11-07 18:13:19,729 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5d862b7/e039b6b9de5a49d2ac7eea7919b8646b/FLAG5ecdb8dc6 [2018-11-07 18:13:20,417 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:13:20,417 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label20_false-unreach-call.c [2018-11-07 18:13:20,436 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5d862b7/e039b6b9de5a49d2ac7eea7919b8646b/FLAG5ecdb8dc6 [2018-11-07 18:13:20,454 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d5d862b7/e039b6b9de5a49d2ac7eea7919b8646b [2018-11-07 18:13:20,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:13:20,468 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:13:20,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:13:20,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:13:20,474 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:13:20,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:13:20" (1/1) ... [2018-11-07 18:13:20,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581a459d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:20, skipping insertion in model container [2018-11-07 18:13:20,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:13:20" (1/1) ... [2018-11-07 18:13:20,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:13:20,597 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:13:21,336 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:13:21,341 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:13:21,598 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:13:21,625 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:13:21,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21 WrapperNode [2018-11-07 18:13:21,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:13:21,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:13:21,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:13:21,628 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:13:21,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:13:21,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:13:21,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:13:21,860 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:13:21,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:21,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:22,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (1/1) ... [2018-11-07 18:13:22,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:13:22,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:13:22,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:13:22,031 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:13:22,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (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 [2018-11-07 18:13:22,103 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:13:22,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:13:22,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:13:22,104 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 18:13:22,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 18:13:22,105 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:13:22,105 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:13:22,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:13:22,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:13:22,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:13:22,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:13:27,632 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:13:27,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:13:27 BoogieIcfgContainer [2018-11-07 18:13:27,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:13:27,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:13:27,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:13:27,638 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:13:27,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:13:20" (1/3) ... [2018-11-07 18:13:27,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fe9a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:13:27, skipping insertion in model container [2018-11-07 18:13:27,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:13:21" (2/3) ... [2018-11-07 18:13:27,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36fe9a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:13:27, skipping insertion in model container [2018-11-07 18:13:27,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:13:27" (3/3) ... [2018-11-07 18:13:27,642 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label20_false-unreach-call.c [2018-11-07 18:13:27,653 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:13:27,661 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:13:27,678 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:13:27,728 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:13:27,728 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:13:27,728 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:13:27,729 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:13:27,729 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:13:27,729 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:13:27,729 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:13:27,729 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:13:27,767 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states. [2018-11-07 18:13:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-07 18:13:27,777 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:27,778 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:13:27,780 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:27,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash -730185661, now seen corresponding path program 1 times [2018-11-07 18:13:27,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:27,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:27,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:27,841 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:28,269 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:13:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:13:28,363 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:13:28,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:13:28,364 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:28,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:13:28,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:13:28,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:13:28,391 INFO L87 Difference]: Start difference. First operand 410 states. Second operand 3 states. [2018-11-07 18:13:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:13:31,680 INFO L93 Difference]: Finished difference Result 1156 states and 2144 transitions. [2018-11-07 18:13:31,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:13:31,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2018-11-07 18:13:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:13:31,713 INFO L225 Difference]: With dead ends: 1156 [2018-11-07 18:13:31,713 INFO L226 Difference]: Without dead ends: 744 [2018-11-07 18:13:31,724 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 [2018-11-07 18:13:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2018-11-07 18:13:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2018-11-07 18:13:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2018-11-07 18:13:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1329 transitions. [2018-11-07 18:13:31,886 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1329 transitions. Word has length 31 [2018-11-07 18:13:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:13:31,887 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1329 transitions. [2018-11-07 18:13:31,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:13:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1329 transitions. [2018-11-07 18:13:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-07 18:13:31,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:31,902 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:13:31,903 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:31,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1012571840, now seen corresponding path program 1 times [2018-11-07 18:13:31,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:31,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:31,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:31,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:31,907 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:13:32,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:13:32,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:13:32,330 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:32,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:13:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:13:32,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:13:32,333 INFO L87 Difference]: Start difference. First operand 744 states and 1329 transitions. Second operand 6 states. [2018-11-07 18:13:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:13:38,746 INFO L93 Difference]: Finished difference Result 2183 states and 3908 transitions. [2018-11-07 18:13:38,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:13:38,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2018-11-07 18:13:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:13:38,764 INFO L225 Difference]: With dead ends: 2183 [2018-11-07 18:13:38,765 INFO L226 Difference]: Without dead ends: 1445 [2018-11-07 18:13:38,770 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:13:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2018-11-07 18:13:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1424. [2018-11-07 18:13:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2018-11-07 18:13:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2239 transitions. [2018-11-07 18:13:38,836 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2239 transitions. Word has length 139 [2018-11-07 18:13:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:13:38,837 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 2239 transitions. [2018-11-07 18:13:38,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:13:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2239 transitions. [2018-11-07 18:13:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-07 18:13:38,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:38,848 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:13:38,849 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:38,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -770120659, now seen corresponding path program 1 times [2018-11-07 18:13:38,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:38,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:38,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:38,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:38,851 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:13:39,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:13:39,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:13:39,123 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:39,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:13:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:13:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:13:39,125 INFO L87 Difference]: Start difference. First operand 1424 states and 2239 transitions. Second operand 6 states. [2018-11-07 18:13:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:13:42,984 INFO L93 Difference]: Finished difference Result 3902 states and 6351 transitions. [2018-11-07 18:13:42,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:13:42,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2018-11-07 18:13:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:13:43,009 INFO L225 Difference]: With dead ends: 3902 [2018-11-07 18:13:43,010 INFO L226 Difference]: Without dead ends: 2484 [2018-11-07 18:13:43,015 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:13:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2018-11-07 18:13:43,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2474. [2018-11-07 18:13:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2474 states. [2018-11-07 18:13:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3744 transitions. [2018-11-07 18:13:43,088 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3744 transitions. Word has length 142 [2018-11-07 18:13:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:13:43,089 INFO L480 AbstractCegarLoop]: Abstraction has 2474 states and 3744 transitions. [2018-11-07 18:13:43,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:13:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3744 transitions. [2018-11-07 18:13:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-11-07 18:13:43,098 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:13:43,099 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:13:43,099 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:13:43,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:43,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1326532992, now seen corresponding path program 1 times [2018-11-07 18:13:43,100 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:13:43,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:43,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:13:43,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:13:43,101 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:13:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:13:43,396 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:13:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 48 proven. 106 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 18:13:43,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:13:43,853 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:13:43,854 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 259 with the following transitions: [2018-11-07 18:13:43,857 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:13:43,929 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:13:43,930 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:13:44,800 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:13:44,802 INFO L272 AbstractInterpreter]: Visited 121 different actions 121 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:13:44,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:13:44,838 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:13:45,795 INFO L227 lantSequenceWeakener]: Weakened 236 states. On average, predicates are now at 77.62% of their original sizes. [2018-11-07 18:13:45,796 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:13:47,150 INFO L415 sIntCurrentIteration]: We unified 257 AI predicates to 257 [2018-11-07 18:13:47,150 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:13:47,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:13:47,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 18:13:47,152 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:13:47,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:13:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:13:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:13:47,154 INFO L87 Difference]: Start difference. First operand 2474 states and 3744 transitions. Second operand 10 states. [2018-11-07 18:13:51,969 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:14:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:14:21,958 INFO L93 Difference]: Finished difference Result 5285 states and 7974 transitions. [2018-11-07 18:14:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 18:14:21,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 258 [2018-11-07 18:14:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:14:21,975 INFO L225 Difference]: With dead ends: 5285 [2018-11-07 18:14:21,976 INFO L226 Difference]: Without dead ends: 2817 [2018-11-07 18:14:21,985 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 261 GetRequests, 206 SyntacticMatches, 43 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:14:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2018-11-07 18:14:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2812. [2018-11-07 18:14:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2018-11-07 18:14:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4089 transitions. [2018-11-07 18:14:22,065 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4089 transitions. Word has length 258 [2018-11-07 18:14:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:14:22,066 INFO L480 AbstractCegarLoop]: Abstraction has 2812 states and 4089 transitions. [2018-11-07 18:14:22,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:14:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4089 transitions. [2018-11-07 18:14:22,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-11-07 18:14:22,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:14:22,075 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:14:22,075 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:14:22,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1380972291, now seen corresponding path program 1 times [2018-11-07 18:14:22,078 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:14:22,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:22,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:14:22,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:22,080 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:14:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:14:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 167 proven. 110 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-07 18:14:22,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:14:22,538 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:14:22,538 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 351 with the following transitions: [2018-11-07 18:14:22,538 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [760], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:14:22,543 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:14:22,543 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:14:22,600 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:14:22,811 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:14:22,812 INFO L272 AbstractInterpreter]: Visited 126 different actions 364 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:14:22,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:22,825 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:14:22,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:14:22,825 INFO L194 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 [2018-11-07 18:14:22,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:14:22,839 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:14:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:14:22,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:14:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-07 18:14:24,088 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:14:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 167 proven. 110 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-11-07 18:14:24,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:14:24,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-07 18:14:24,593 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:14:24,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:14:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:14:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:14:24,595 INFO L87 Difference]: Start difference. First operand 2812 states and 4089 transitions. Second operand 9 states. [2018-11-07 18:14:25,748 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:14:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:14:38,898 INFO L93 Difference]: Finished difference Result 11117 states and 16850 transitions. [2018-11-07 18:14:38,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 18:14:38,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 350 [2018-11-07 18:14:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:14:38,952 INFO L225 Difference]: With dead ends: 11117 [2018-11-07 18:14:38,953 INFO L226 Difference]: Without dead ends: 7304 [2018-11-07 18:14:39,025 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 733 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=515, Invalid=1837, Unknown=0, NotChecked=0, Total=2352 [2018-11-07 18:14:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2018-11-07 18:14:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 7038. [2018-11-07 18:14:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7038 states. [2018-11-07 18:14:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 7989 transitions. [2018-11-07 18:14:39,271 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 7989 transitions. Word has length 350 [2018-11-07 18:14:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:14:39,272 INFO L480 AbstractCegarLoop]: Abstraction has 7038 states and 7989 transitions. [2018-11-07 18:14:39,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:14:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 7989 transitions. [2018-11-07 18:14:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-11-07 18:14:39,292 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:14:39,292 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:14:39,293 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:14:39,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1331490203, now seen corresponding path program 1 times [2018-11-07 18:14:39,294 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:14:39,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:39,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:14:39,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:14:39,302 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:14:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:14:40,514 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-07 18:14:40,728 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 18:14:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 182 proven. 123 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-11-07 18:14:41,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:14:41,787 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:14:41,787 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 499 with the following transitions: [2018-11-07 18:14:41,788 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:14:41,801 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:14:41,801 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:14:42,696 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:14:42,697 INFO L272 AbstractInterpreter]: Visited 249 different actions 492 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:14:42,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:14:42,736 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:14:43,801 INFO L227 lantSequenceWeakener]: Weakened 268 states. On average, predicates are now at 77.72% of their original sizes. [2018-11-07 18:14:43,802 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:14:47,027 INFO L415 sIntCurrentIteration]: We unified 497 AI predicates to 497 [2018-11-07 18:14:47,027 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:14:47,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:14:47,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [8] total 24 [2018-11-07 18:14:47,028 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:14:47,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:14:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:14:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:14:47,029 INFO L87 Difference]: Start difference. First operand 7038 states and 7989 transitions. Second operand 18 states. [2018-11-07 18:14:55,239 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:15:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:15:01,395 INFO L93 Difference]: Finished difference Result 14372 states and 16368 transitions. [2018-11-07 18:15:01,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:15:01,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 498 [2018-11-07 18:15:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:15:01,431 INFO L225 Difference]: With dead ends: 14372 [2018-11-07 18:15:01,431 INFO L226 Difference]: Without dead ends: 7678 [2018-11-07 18:15:01,451 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 513 GetRequests, 422 SyntacticMatches, 59 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 18:15:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2018-11-07 18:15:01,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7673. [2018-11-07 18:15:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7673 states. [2018-11-07 18:15:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7673 states to 7673 states and 8640 transitions. [2018-11-07 18:15:01,652 INFO L78 Accepts]: Start accepts. Automaton has 7673 states and 8640 transitions. Word has length 498 [2018-11-07 18:15:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:15:01,653 INFO L480 AbstractCegarLoop]: Abstraction has 7673 states and 8640 transitions. [2018-11-07 18:15:01,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:15:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7673 states and 8640 transitions. [2018-11-07 18:15:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-11-07 18:15:01,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:15:01,673 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:15:01,673 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:15:01,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1570202143, now seen corresponding path program 1 times [2018-11-07 18:15:01,675 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:15:01,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:01,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:15:01,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:01,676 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:15:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:15:02,168 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:15:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 108 proven. 389 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 18:15:02,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:15:02,921 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:15:02,921 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-11-07 18:15:02,922 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:15:02,927 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:15:02,927 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:15:03,014 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:15:05,684 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:15:05,684 INFO L272 AbstractInterpreter]: Visited 258 different actions 2546 times. Merged at 7 different actions 65 times. Widened at 1 different actions 5 times. Found 10 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:15:05,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:05,691 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:15:06,630 INFO L227 lantSequenceWeakener]: Weakened 58 states. On average, predicates are now at 78.95% of their original sizes. [2018-11-07 18:15:06,630 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:15:07,055 INFO L415 sIntCurrentIteration]: We unified 606 AI predicates to 606 [2018-11-07 18:15:07,056 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:15:07,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:15:07,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-07 18:15:07,056 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:15:07,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-07 18:15:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-07 18:15:07,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:15:07,058 INFO L87 Difference]: Start difference. First operand 7673 states and 8640 transitions. Second operand 19 states. [2018-11-07 18:15:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:15:24,279 INFO L93 Difference]: Finished difference Result 15949 states and 18102 transitions. [2018-11-07 18:15:24,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 18:15:24,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 607 [2018-11-07 18:15:24,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:15:24,318 INFO L225 Difference]: With dead ends: 15949 [2018-11-07 18:15:24,319 INFO L226 Difference]: Without dead ends: 9255 [2018-11-07 18:15:24,338 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 618 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-11-07 18:15:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2018-11-07 18:15:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8682. [2018-11-07 18:15:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8682 states. [2018-11-07 18:15:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 9759 transitions. [2018-11-07 18:15:24,577 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 9759 transitions. Word has length 607 [2018-11-07 18:15:24,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:15:24,578 INFO L480 AbstractCegarLoop]: Abstraction has 8682 states and 9759 transitions. [2018-11-07 18:15:24,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-07 18:15:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 9759 transitions. [2018-11-07 18:15:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2018-11-07 18:15:24,611 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:15:24,612 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:15:24,612 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:15:24,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1501697322, now seen corresponding path program 1 times [2018-11-07 18:15:24,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:15:24,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:24,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:15:24,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:24,614 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:15:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:15:25,310 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-11-07 18:15:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 316 proven. 396 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2018-11-07 18:15:26,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:15:26,199 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:15:26,199 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 723 with the following transitions: [2018-11-07 18:15:26,200 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1288], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:15:26,204 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:15:26,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:15:26,490 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:15:27,565 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:15:27,565 INFO L272 AbstractInterpreter]: Visited 250 different actions 1487 times. Merged at 7 different actions 42 times. Widened at 1 different actions 2 times. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:15:27,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:27,573 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:15:28,340 INFO L227 lantSequenceWeakener]: Weakened 160 states. On average, predicates are now at 77.88% of their original sizes. [2018-11-07 18:15:28,341 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:15:28,843 INFO L415 sIntCurrentIteration]: We unified 721 AI predicates to 721 [2018-11-07 18:15:28,844 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:15:28,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:15:28,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [8] total 26 [2018-11-07 18:15:28,845 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:15:28,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:15:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:15:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:15:28,847 INFO L87 Difference]: Start difference. First operand 8682 states and 9759 transitions. Second operand 20 states. [2018-11-07 18:15:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:15:55,720 INFO L93 Difference]: Finished difference Result 19649 states and 22106 transitions. [2018-11-07 18:15:55,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-07 18:15:55,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 722 [2018-11-07 18:15:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:15:55,760 INFO L225 Difference]: With dead ends: 19649 [2018-11-07 18:15:55,760 INFO L226 Difference]: Without dead ends: 12244 [2018-11-07 18:15:55,782 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 734 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 18:15:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12244 states. [2018-11-07 18:15:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12244 to 11714. [2018-11-07 18:15:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11714 states. [2018-11-07 18:15:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11714 states to 11714 states and 12986 transitions. [2018-11-07 18:15:56,037 INFO L78 Accepts]: Start accepts. Automaton has 11714 states and 12986 transitions. Word has length 722 [2018-11-07 18:15:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:15:56,038 INFO L480 AbstractCegarLoop]: Abstraction has 11714 states and 12986 transitions. [2018-11-07 18:15:56,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 18:15:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 11714 states and 12986 transitions. [2018-11-07 18:15:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2018-11-07 18:15:56,059 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:15:56,059 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:15:56,060 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:15:56,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:15:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2095903535, now seen corresponding path program 1 times [2018-11-07 18:15:56,060 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:15:56,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:56,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:15:56,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:15:56,062 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:15:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:15:56,642 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 18:16:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 509 proven. 397 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2018-11-07 18:16:02,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:16:02,611 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:16:02,612 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 771 with the following transitions: [2018-11-07 18:16:02,612 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1044], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:16:02,616 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:16:02,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:16:02,698 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:16:04,834 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:16:04,835 INFO L272 AbstractInterpreter]: Visited 259 different actions 2833 times. Merged at 8 different actions 94 times. Widened at 1 different actions 6 times. Found 20 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:16:04,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:04,841 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:16:05,441 INFO L227 lantSequenceWeakener]: Weakened 767 states. On average, predicates are now at 77.4% of their original sizes. [2018-11-07 18:16:05,441 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:16:05,606 INFO L415 sIntCurrentIteration]: We unified 769 AI predicates to 769 [2018-11-07 18:16:05,607 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:16:05,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:16:05,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 18:16:05,608 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:16:05,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:16:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:16:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:16:05,609 INFO L87 Difference]: Start difference. First operand 11714 states and 12986 transitions. Second operand 10 states. [2018-11-07 18:16:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:16:12,257 INFO L93 Difference]: Finished difference Result 21304 states and 23936 transitions. [2018-11-07 18:16:12,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:16:12,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 770 [2018-11-07 18:16:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:16:12,303 INFO L225 Difference]: With dead ends: 21304 [2018-11-07 18:16:12,303 INFO L226 Difference]: Without dead ends: 12495 [2018-11-07 18:16:12,330 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 777 GetRequests, 742 SyntacticMatches, 19 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:16:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12495 states. [2018-11-07 18:16:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12495 to 12424. [2018-11-07 18:16:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2018-11-07 18:16:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 13768 transitions. [2018-11-07 18:16:12,606 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 13768 transitions. Word has length 770 [2018-11-07 18:16:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:16:12,607 INFO L480 AbstractCegarLoop]: Abstraction has 12424 states and 13768 transitions. [2018-11-07 18:16:12,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:16:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 13768 transitions. [2018-11-07 18:16:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-11-07 18:16:12,629 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:16:12,630 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:16:12,630 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:16:12,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash -572653294, now seen corresponding path program 1 times [2018-11-07 18:16:12,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:16:12,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:12,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:16:12,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:12,633 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:16:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:16:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 406 proven. 223 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2018-11-07 18:16:13,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:16:13,693 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:16:13,693 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 772 with the following transitions: [2018-11-07 18:16:13,693 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1048], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:16:13,697 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:16:13,697 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:16:13,739 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:16:15,567 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:16:15,567 INFO L272 AbstractInterpreter]: Visited 259 different actions 2055 times. Merged at 8 different actions 60 times. Widened at 1 different actions 3 times. Found 11 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:16:15,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:15,574 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:16:16,206 INFO L227 lantSequenceWeakener]: Weakened 768 states. On average, predicates are now at 77.4% of their original sizes. [2018-11-07 18:16:16,206 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:16:16,481 INFO L415 sIntCurrentIteration]: We unified 770 AI predicates to 770 [2018-11-07 18:16:16,481 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:16:16,481 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:16:16,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 18:16:16,482 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:16:16,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:16:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:16:16,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:16:16,483 INFO L87 Difference]: Start difference. First operand 12424 states and 13768 transitions. Second operand 10 states. [2018-11-07 18:16:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:16:24,958 INFO L93 Difference]: Finished difference Result 23066 states and 25855 transitions. [2018-11-07 18:16:24,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:16:24,958 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 771 [2018-11-07 18:16:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:16:25,004 INFO L225 Difference]: With dead ends: 23066 [2018-11-07 18:16:25,005 INFO L226 Difference]: Without dead ends: 13547 [2018-11-07 18:16:25,033 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 778 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:16:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13547 states. [2018-11-07 18:16:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13547 to 13470. [2018-11-07 18:16:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13470 states. [2018-11-07 18:16:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13470 states to 13470 states and 14942 transitions. [2018-11-07 18:16:25,306 INFO L78 Accepts]: Start accepts. Automaton has 13470 states and 14942 transitions. Word has length 771 [2018-11-07 18:16:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:16:25,307 INFO L480 AbstractCegarLoop]: Abstraction has 13470 states and 14942 transitions. [2018-11-07 18:16:25,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:16:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 13470 states and 14942 transitions. [2018-11-07 18:16:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 801 [2018-11-07 18:16:25,337 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:16:25,338 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:16:25,338 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:16:25,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 766369933, now seen corresponding path program 1 times [2018-11-07 18:16:25,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:16:25,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:25,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:16:25,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:25,341 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:16:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:16:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 406 proven. 252 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2018-11-07 18:16:27,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:16:27,071 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:16:27,072 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 801 with the following transitions: [2018-11-07 18:16:27,072 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [796], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [972], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1048], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:16:27,077 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:16:27,077 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:16:27,120 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:16:29,038 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:16:29,039 INFO L272 AbstractInterpreter]: Visited 260 different actions 2854 times. Merged at 10 different actions 111 times. Widened at 1 different actions 6 times. Found 26 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:16:29,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:29,046 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:16:29,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:16:29,046 INFO L194 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 [2018-11-07 18:16:29,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:16:29,056 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:16:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:16:29,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:16:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 1050 proven. 2 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2018-11-07 18:16:30,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:16:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 406 proven. 252 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2018-11-07 18:16:30,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:16:30,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-07 18:16:30,775 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:16:30,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:16:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:16:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:16:30,777 INFO L87 Difference]: Start difference. First operand 13470 states and 14942 transitions. Second operand 9 states. [2018-11-07 18:16:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:16:36,385 INFO L93 Difference]: Finished difference Result 31462 states and 38446 transitions. [2018-11-07 18:16:36,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:16:36,385 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 800 [2018-11-07 18:16:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:16:36,481 INFO L225 Difference]: With dead ends: 31462 [2018-11-07 18:16:36,481 INFO L226 Difference]: Without dead ends: 20057 [2018-11-07 18:16:36,549 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1625 GetRequests, 1605 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:16:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20057 states. [2018-11-07 18:16:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20057 to 19864. [2018-11-07 18:16:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19864 states. [2018-11-07 18:16:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19864 states to 19864 states and 23571 transitions. [2018-11-07 18:16:37,070 INFO L78 Accepts]: Start accepts. Automaton has 19864 states and 23571 transitions. Word has length 800 [2018-11-07 18:16:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:16:37,071 INFO L480 AbstractCegarLoop]: Abstraction has 19864 states and 23571 transitions. [2018-11-07 18:16:37,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:16:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19864 states and 23571 transitions. [2018-11-07 18:16:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2018-11-07 18:16:37,124 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:16:37,125 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:16:37,125 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:16:37,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 303347561, now seen corresponding path program 1 times [2018-11-07 18:16:37,126 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:16:37,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:37,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:16:37,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:16:37,127 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:16:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:16:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2608 backedges. 1287 proven. 142 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2018-11-07 18:16:39,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:16:39,157 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:16:39,157 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1097 with the following transitions: [2018-11-07 18:16:39,157 INFO L202 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [327], [329], [332], [340], [348], [356], [364], [372], [380], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [672], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [964], [965], [969], [972], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1189], [1193], [1197], [1201], [1205], [1209], [1213], [1217], [1221], [1225], [1229], [1233], [1237], [1241], [1245], [1249], [1253], [1257], [1261], [1265], [1269], [1273], [1277], [1281], [1285], [1289], [1293], [1296], [1297], [1301], [1305], [1309], [1313], [1317], [1321], [1325], [1329], [1333], [1337], [1341], [1345], [1349], [1352], [1552], [1556], [1560], [1566], [1570], [1572], [1579], [1580], [1581], [1583], [1584] [2018-11-07 18:16:39,161 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:16:39,161 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:16:39,556 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:16:39,965 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:16:39,965 INFO L272 AbstractInterpreter]: Visited 253 different actions 1004 times. Merged at 7 different actions 25 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:16:39,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:16:39,971 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:16:41,195 INFO L227 lantSequenceWeakener]: Weakened 632 states. On average, predicates are now at 77.5% of their original sizes. [2018-11-07 18:16:41,196 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:16:41,680 INFO L415 sIntCurrentIteration]: We unified 1095 AI predicates to 1095 [2018-11-07 18:16:41,681 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:16:41,681 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:16:41,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [8] total 26 [2018-11-07 18:16:41,681 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:16:41,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 18:16:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 18:16:41,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:16:41,683 INFO L87 Difference]: Start difference. First operand 19864 states and 23571 transitions. Second operand 20 states. Received shutdown request... [2018-11-07 18:16:49,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 18:16:49,195 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:16:49,200 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:16:49,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:16:49 BoogieIcfgContainer [2018-11-07 18:16:49,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:16:49,201 INFO L168 Benchmark]: Toolchain (without parser) took 208734.30 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 71.6 MB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2018-11-07 18:16:49,202 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:16:49,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1157.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:16:49,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 230.29 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2018-11-07 18:16:49,204 INFO L168 Benchmark]: Boogie Preprocessor took 170.90 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:16:49,205 INFO L168 Benchmark]: RCFGBuilder took 5602.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 249.8 MB). Peak memory consumption was 249.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:16:49,205 INFO L168 Benchmark]: TraceAbstraction took 201566.29 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 598.2 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-11-07 18:16:49,210 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1157.39 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 230.29 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 735.1 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -860.9 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 170.90 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5602.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 249.8 MB). Peak memory consumption was 249.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 201566.29 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.0 GB in the beginning and 1.4 GB in the end (delta: 598.2 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 79). Cancelled while BasicCegarLoop was constructing difference of abstraction (19864states) and FLOYD_HOARE automaton (currently 20 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (305 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 410 locations, 1 error locations. TIMEOUT Result, 201.4s OverallTime, 12 OverallIterations, 8 TraceHistogramMax, 150.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2049 SDtfs, 26892 SDslu, 2359 SDs, 0 SdLazy, 35403 SolverSat, 5539 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.1s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 7213 GetRequests, 6845 SyntacticMatches, 128 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19864occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.2s AbstIntTime, 9 AbstIntIterations, 7 AbstIntStrong, 0.9980280446189418 AbsIntWeakeningRatio, 0.05896076352067869 AbsIntAvgWeakeningVarsNumRemoved, 16.77136797454931 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 1751 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 10.6s InterpolantComputationTime, 7334 NumberOfCodeBlocks, 7334 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 8468 ConstructedInterpolants, 0 QuantifiedInterpolants, 23378800 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1685 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 9882/12386 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown