java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:08:32,656 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:08:32,658 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:08:32,672 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:08:32,673 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:08:32,674 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:08:32,676 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:08:32,678 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:08:32,680 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:08:32,683 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:08:32,685 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:08:32,686 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:08:32,687 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:08:32,688 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:08:32,689 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:08:32,692 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:08:32,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:08:32,696 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:08:32,705 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:08:32,709 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:08:32,711 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:08:32,712 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:08:32,715 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:08:32,715 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:08:32,715 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:08:32,716 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:08:32,717 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:08:32,718 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:08:32,722 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:08:32,723 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:08:32,723 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:08:32,725 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 19:08:32,726 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 19:08:32,726 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 19:08:32,727 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 19:08:32,728 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 19:08:32,728 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 19:08:32,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:08:32,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:08:32,754 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:08:32,755 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:08:32,755 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:08:32,755 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:08:32,755 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:08:32,755 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:08:32,756 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:08:32,756 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:08:32,756 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:08:32,756 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:08:32,756 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:08:32,757 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:08:32,758 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:08:32,760 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:08:32,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:08:32,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:08:32,760 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:08:32,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:08:32,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:08:32,762 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:08:32,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:08:32,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:08:32,762 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:08:32,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:08:32,763 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:08:32,763 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:08:32,763 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:08:32,763 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:08:32,809 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:08:32,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:08:32,825 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:08:32,826 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:08:32,827 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:08:32,828 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55_true-unreach-call_false-termination.c [2018-11-12 19:08:32,893 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2d5cf89/317d7fb3702f4beab6b3b8632003a906/FLAGbf49807a9 [2018-11-12 19:08:33,439 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:08:33,440 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55_true-unreach-call_false-termination.c [2018-11-12 19:08:33,460 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2d5cf89/317d7fb3702f4beab6b3b8632003a906/FLAGbf49807a9 [2018-11-12 19:08:33,477 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2d5cf89/317d7fb3702f4beab6b3b8632003a906 [2018-11-12 19:08:33,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:08:33,490 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:08:33,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:08:33,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:08:33,495 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:08:33,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:08:33" (1/1) ... [2018-11-12 19:08:33,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e4202d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:33, skipping insertion in model container [2018-11-12 19:08:33,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:08:33" (1/1) ... [2018-11-12 19:08:33,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:08:33,573 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:08:34,089 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:08:34,093 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:08:34,256 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:08:34,277 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:08:34,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34 WrapperNode [2018-11-12 19:08:34,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:08:34,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:08:34,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:08:34,279 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:08:34,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:08:34,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:08:34,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:08:34,454 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:08:34,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... [2018-11-12 19:08:34,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:08:34,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:08:34,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:08:34,550 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:08:34,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:08:34,620 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:08:34,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:08:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:08:34,621 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:08:34,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:08:34,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:08:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:08:34,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:08:34,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:08:38,303 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:08:38,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:08:38 BoogieIcfgContainer [2018-11-12 19:08:38,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:08:38,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:08:38,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:08:38,309 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:08:38,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:08:33" (1/3) ... [2018-11-12 19:08:38,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f8ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:08:38, skipping insertion in model container [2018-11-12 19:08:38,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:08:34" (2/3) ... [2018-11-12 19:08:38,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f8ee77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:08:38, skipping insertion in model container [2018-11-12 19:08:38,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:08:38" (3/3) ... [2018-11-12 19:08:38,313 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label55_true-unreach-call_false-termination.c [2018-11-12 19:08:38,324 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:08:38,337 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:08:38,356 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:08:38,397 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:08:38,397 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:08:38,397 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:08:38,398 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:08:38,398 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:08:38,398 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:08:38,399 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:08:38,399 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:08:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:08:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-12 19:08:38,438 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:38,440 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:38,442 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:38,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -353931284, now seen corresponding path program 1 times [2018-11-12 19:08:38,452 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:38,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:38,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:38,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:38,512 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:38,961 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-11-12 19:08:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:08:38,991 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:08:38,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:08:38,993 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:39,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:08:39,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:08:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:08:39,024 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 19:08:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:41,792 INFO L93 Difference]: Finished difference Result 894 states and 1611 transitions. [2018-11-12 19:08:41,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:08:41,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2018-11-12 19:08:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:41,821 INFO L225 Difference]: With dead ends: 894 [2018-11-12 19:08:41,821 INFO L226 Difference]: Without dead ends: 633 [2018-11-12 19:08:41,831 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:08:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-12 19:08:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 633. [2018-11-12 19:08:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 633 states. [2018-11-12 19:08:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1007 transitions. [2018-11-12 19:08:41,934 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1007 transitions. Word has length 64 [2018-11-12 19:08:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:41,935 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1007 transitions. [2018-11-12 19:08:41,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:08:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1007 transitions. [2018-11-12 19:08:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-12 19:08:41,959 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:41,960 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 19:08:41,960 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:41,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash 835688739, now seen corresponding path program 1 times [2018-11-12 19:08:41,962 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:41,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:41,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:41,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:41,964 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:08:42,425 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:08:42,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:08:42,425 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:42,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:08:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:08:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:08:42,428 INFO L87 Difference]: Start difference. First operand 633 states and 1007 transitions. Second operand 4 states. [2018-11-12 19:08:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:46,451 INFO L93 Difference]: Finished difference Result 2358 states and 3926 transitions. [2018-11-12 19:08:46,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:08:46,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 177 [2018-11-12 19:08:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:46,467 INFO L225 Difference]: With dead ends: 2358 [2018-11-12 19:08:46,467 INFO L226 Difference]: Without dead ends: 1731 [2018-11-12 19:08:46,473 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:08:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-12 19:08:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-12 19:08:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-12 19:08:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2621 transitions. [2018-11-12 19:08:46,565 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2621 transitions. Word has length 177 [2018-11-12 19:08:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:46,567 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2621 transitions. [2018-11-12 19:08:46,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:08:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2621 transitions. [2018-11-12 19:08:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-11-12 19:08:46,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:46,578 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:08:46,578 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:46,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:46,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1405952572, now seen corresponding path program 1 times [2018-11-12 19:08:46,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:46,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:46,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:46,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:46,581 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:08:47,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:47,158 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:47,159 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 261 with the following transitions: [2018-11-12 19:08:47,161 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:47,226 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:47,226 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:47,848 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:47,851 INFO L272 AbstractInterpreter]: Visited 117 different actions 117 times. Never merged. Never widened. Performed 1016 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1016 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 19:08:47,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:47,870 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:48,478 INFO L227 lantSequenceWeakener]: Weakened 251 states. On average, predicates are now at 78.09% of their original sizes. [2018-11-12 19:08:48,478 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:48,633 INFO L415 sIntCurrentIteration]: We unified 259 AI predicates to 259 [2018-11-12 19:08:48,633 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:48,634 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:48,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 19:08:48,635 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:48,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:08:48,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:08:48,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:08:48,636 INFO L87 Difference]: Start difference. First operand 1731 states and 2621 transitions. Second operand 7 states. [2018-11-12 19:08:50,538 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:03,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:03,558 INFO L93 Difference]: Finished difference Result 3641 states and 5476 transitions. [2018-11-12 19:09:03,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:09:03,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 260 [2018-11-12 19:09:03,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:03,570 INFO L225 Difference]: With dead ends: 3641 [2018-11-12 19:09:03,571 INFO L226 Difference]: Without dead ends: 1916 [2018-11-12 19:09:03,577 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 260 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:09:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-12 19:09:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-12 19:09:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-12 19:09:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2811 transitions. [2018-11-12 19:09:03,634 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2811 transitions. Word has length 260 [2018-11-12 19:09:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:03,634 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2811 transitions. [2018-11-12 19:09:03,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:09:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2811 transitions. [2018-11-12 19:09:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-11-12 19:09:03,644 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:03,645 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:03,645 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:03,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:03,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1712998387, now seen corresponding path program 1 times [2018-11-12 19:09:03,646 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:03,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:03,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:03,648 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:04,438 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 19:09:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 258 proven. 161 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:09:04,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:04,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:04,991 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 346 with the following transitions: [2018-11-12 19:09:04,991 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:04,997 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:04,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:05,421 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:05,421 INFO L272 AbstractInterpreter]: Visited 121 different actions 236 times. Merged at 5 different actions 5 times. Never widened. Performed 3288 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3288 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:09:05,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:05,458 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:06,248 INFO L227 lantSequenceWeakener]: Weakened 154 states. On average, predicates are now at 78.04% of their original sizes. [2018-11-12 19:09:06,249 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:07,852 INFO L415 sIntCurrentIteration]: We unified 344 AI predicates to 344 [2018-11-12 19:09:07,852 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:07,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:07,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [12] total 34 [2018-11-12 19:09:07,853 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:07,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 19:09:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 19:09:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-11-12 19:09:07,856 INFO L87 Difference]: Start difference. First operand 1914 states and 2811 transitions. Second operand 24 states. [2018-11-12 19:09:14,780 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:30,369 INFO L93 Difference]: Finished difference Result 5233 states and 7449 transitions. [2018-11-12 19:09:30,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-12 19:09:30,369 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 345 [2018-11-12 19:09:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:30,394 INFO L225 Difference]: With dead ends: 5233 [2018-11-12 19:09:30,394 INFO L226 Difference]: Without dead ends: 3508 [2018-11-12 19:09:30,402 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 354 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-11-12 19:09:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2018-11-12 19:09:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3261. [2018-11-12 19:09:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3261 states. [2018-11-12 19:09:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3261 states to 3261 states and 4236 transitions. [2018-11-12 19:09:30,497 INFO L78 Accepts]: Start accepts. Automaton has 3261 states and 4236 transitions. Word has length 345 [2018-11-12 19:09:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:30,498 INFO L480 AbstractCegarLoop]: Abstraction has 3261 states and 4236 transitions. [2018-11-12 19:09:30,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-12 19:09:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3261 states and 4236 transitions. [2018-11-12 19:09:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-11-12 19:09:30,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:30,514 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 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] [2018-11-12 19:09:30,514 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:30,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:30,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2042367905, now seen corresponding path program 1 times [2018-11-12 19:09:30,515 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:30,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:30,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:30,516 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 230 proven. 166 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2018-11-12 19:09:31,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:31,123 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:31,123 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 372 with the following transitions: [2018-11-12 19:09:31,123 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:31,129 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:31,130 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:31,277 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:31,277 INFO L272 AbstractInterpreter]: Visited 121 different actions 236 times. Merged at 5 different actions 5 times. Never widened. Performed 2157 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2157 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:09:31,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:31,285 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:32,214 INFO L227 lantSequenceWeakener]: Weakened 147 states. On average, predicates are now at 79.03% of their original sizes. [2018-11-12 19:09:32,215 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:32,801 INFO L415 sIntCurrentIteration]: We unified 370 AI predicates to 370 [2018-11-12 19:09:32,801 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:32,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:32,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [8] total 26 [2018-11-12 19:09:32,802 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:32,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:09:32,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:09:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:09:32,804 INFO L87 Difference]: Start difference. First operand 3261 states and 4236 transitions. Second operand 20 states. [2018-11-12 19:09:39,620 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:45,160 INFO L93 Difference]: Finished difference Result 5359 states and 7337 transitions. [2018-11-12 19:09:45,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:09:45,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 371 [2018-11-12 19:09:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:45,179 INFO L225 Difference]: With dead ends: 5359 [2018-11-12 19:09:45,179 INFO L226 Difference]: Without dead ends: 3634 [2018-11-12 19:09:45,186 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 388 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 19:09:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-11-12 19:09:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 3629. [2018-11-12 19:09:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2018-11-12 19:09:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4633 transitions. [2018-11-12 19:09:45,269 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4633 transitions. Word has length 371 [2018-11-12 19:09:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:45,270 INFO L480 AbstractCegarLoop]: Abstraction has 3629 states and 4633 transitions. [2018-11-12 19:09:45,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:09:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4633 transitions. [2018-11-12 19:09:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2018-11-12 19:09:45,284 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:45,284 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2018-11-12 19:09:45,285 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:45,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1187534869, now seen corresponding path program 1 times [2018-11-12 19:09:45,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:45,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:45,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:45,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:45,286 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 184 proven. 262 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:09:46,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:46,000 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:46,000 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 382 with the following transitions: [2018-11-12 19:09:46,001 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:46,005 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:46,005 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:46,741 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:46,741 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Performed 3315 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3315 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:09:46,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:46,748 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:47,268 INFO L227 lantSequenceWeakener]: Weakened 96 states. On average, predicates are now at 78.5% of their original sizes. [2018-11-12 19:09:47,268 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:47,887 INFO L415 sIntCurrentIteration]: We unified 380 AI predicates to 380 [2018-11-12 19:09:47,887 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:47,887 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:47,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-12 19:09:47,888 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:47,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:09:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:09:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:09:47,890 INFO L87 Difference]: Start difference. First operand 3629 states and 4633 transitions. Second operand 20 states. [2018-11-12 19:09:56,617 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:10:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:10:16,055 INFO L93 Difference]: Finished difference Result 6653 states and 8929 transitions. [2018-11-12 19:10:16,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 19:10:16,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 381 [2018-11-12 19:10:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:10:16,074 INFO L225 Difference]: With dead ends: 6653 [2018-11-12 19:10:16,074 INFO L226 Difference]: Without dead ends: 4928 [2018-11-12 19:10:16,083 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 389 GetRequests, 360 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-11-12 19:10:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2018-11-12 19:10:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4249. [2018-11-12 19:10:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4249 states. [2018-11-12 19:10:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 5290 transitions. [2018-11-12 19:10:16,187 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 5290 transitions. Word has length 381 [2018-11-12 19:10:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:10:16,187 INFO L480 AbstractCegarLoop]: Abstraction has 4249 states and 5290 transitions. [2018-11-12 19:10:16,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:10:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 5290 transitions. [2018-11-12 19:10:16,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2018-11-12 19:10:16,203 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:10:16,204 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:10:16,204 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:10:16,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2056592459, now seen corresponding path program 1 times [2018-11-12 19:10:16,205 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:10:16,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:16,206 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:10:16,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:16,206 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:10:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:10:16,556 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 19:10:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 309 proven. 124 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 19:10:16,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:10:16,857 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:10:16,858 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 398 with the following transitions: [2018-11-12 19:10:16,858 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:10:16,861 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:10:16,862 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:10:17,050 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:10:17,218 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:10:17,219 INFO L272 AbstractInterpreter]: Visited 121 different actions 357 times. Merged at 7 different actions 16 times. Never widened. Performed 3456 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3456 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:10:17,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:17,260 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:10:17,744 INFO L227 lantSequenceWeakener]: Weakened 394 states. On average, predicates are now at 80.49% of their original sizes. [2018-11-12 19:10:17,744 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:10:17,867 INFO L415 sIntCurrentIteration]: We unified 396 AI predicates to 396 [2018-11-12 19:10:17,867 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:10:17,867 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:10:17,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 19:10:17,867 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:10:17,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:10:17,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:10:17,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:10:17,868 INFO L87 Difference]: Start difference. First operand 4249 states and 5290 transitions. Second operand 10 states. [2018-11-12 19:10:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:10:23,262 INFO L93 Difference]: Finished difference Result 6550 states and 8863 transitions. [2018-11-12 19:10:23,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:10:23,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 397 [2018-11-12 19:10:23,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:10:23,282 INFO L225 Difference]: With dead ends: 6550 [2018-11-12 19:10:23,282 INFO L226 Difference]: Without dead ends: 4825 [2018-11-12 19:10:23,291 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 404 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:10:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2018-11-12 19:10:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4808. [2018-11-12 19:10:23,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4808 states. [2018-11-12 19:10:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 6011 transitions. [2018-11-12 19:10:23,391 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 6011 transitions. Word has length 397 [2018-11-12 19:10:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:10:23,392 INFO L480 AbstractCegarLoop]: Abstraction has 4808 states and 6011 transitions. [2018-11-12 19:10:23,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:10:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 6011 transitions. [2018-11-12 19:10:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-11-12 19:10:23,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:10:23,410 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2018-11-12 19:10:23,410 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:10:23,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:23,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1011030864, now seen corresponding path program 1 times [2018-11-12 19:10:23,410 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:10:23,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:23,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:10:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:23,412 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:10:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:10:23,927 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 19:10:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 184 proven. 262 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:10:24,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:10:24,366 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:10:24,367 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 407 with the following transitions: [2018-11-12 19:10:24,367 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:10:24,371 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:10:24,371 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:10:24,562 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:10:24,562 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Performed 3191 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3191 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:10:24,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:24,564 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:10:25,075 INFO L227 lantSequenceWeakener]: Weakened 96 states. On average, predicates are now at 78.5% of their original sizes. [2018-11-12 19:10:25,075 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:10:25,550 INFO L415 sIntCurrentIteration]: We unified 405 AI predicates to 405 [2018-11-12 19:10:25,551 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:10:25,551 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:10:25,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [12] total 31 [2018-11-12 19:10:25,551 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:10:25,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:10:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:10:25,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:10:25,554 INFO L87 Difference]: Start difference. First operand 4808 states and 6011 transitions. Second operand 21 states. [2018-11-12 19:10:35,001 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:10:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:10:51,373 INFO L93 Difference]: Finished difference Result 8508 states and 11191 transitions. [2018-11-12 19:10:51,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-12 19:10:51,373 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 406 [2018-11-12 19:10:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:10:51,393 INFO L225 Difference]: With dead ends: 8508 [2018-11-12 19:10:51,394 INFO L226 Difference]: Without dead ends: 6224 [2018-11-12 19:10:51,401 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 416 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-11-12 19:10:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2018-11-12 19:10:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 5422. [2018-11-12 19:10:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5422 states. [2018-11-12 19:10:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5422 states to 5422 states and 6661 transitions. [2018-11-12 19:10:51,516 INFO L78 Accepts]: Start accepts. Automaton has 5422 states and 6661 transitions. Word has length 406 [2018-11-12 19:10:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:10:51,517 INFO L480 AbstractCegarLoop]: Abstraction has 5422 states and 6661 transitions. [2018-11-12 19:10:51,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:10:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5422 states and 6661 transitions. [2018-11-12 19:10:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-11-12 19:10:51,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:10:51,538 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:10:51,538 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:10:51,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:51,538 INFO L82 PathProgramCache]: Analyzing trace with hash 274668287, now seen corresponding path program 1 times [2018-11-12 19:10:51,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:10:51,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:51,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:10:51,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:51,540 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:10:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:10:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 258 proven. 188 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:10:52,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:10:52,364 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:10:52,364 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 420 with the following transitions: [2018-11-12 19:10:52,365 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:10:52,368 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:10:52,368 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:10:52,585 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:10:52,585 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Performed 3490 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3490 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:10:52,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:52,593 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:10:53,055 INFO L227 lantSequenceWeakener]: Weakened 96 states. On average, predicates are now at 78.5% of their original sizes. [2018-11-12 19:10:53,055 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:10:53,490 INFO L415 sIntCurrentIteration]: We unified 418 AI predicates to 418 [2018-11-12 19:10:53,491 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:10:53,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:10:53,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [12] total 31 [2018-11-12 19:10:53,491 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:10:53,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:10:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:10:53,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:10:53,493 INFO L87 Difference]: Start difference. First operand 5422 states and 6661 transitions. Second operand 21 states. [2018-11-12 19:11:01,869 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:11:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:11:18,729 INFO L93 Difference]: Finished difference Result 9123 states and 11842 transitions. [2018-11-12 19:11:18,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-12 19:11:18,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 419 [2018-11-12 19:11:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:11:18,748 INFO L225 Difference]: With dead ends: 9123 [2018-11-12 19:11:18,748 INFO L226 Difference]: Without dead ends: 6839 [2018-11-12 19:11:18,756 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 429 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2018-11-12 19:11:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2018-11-12 19:11:18,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 6036. [2018-11-12 19:11:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6036 states. [2018-11-12 19:11:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6036 states to 6036 states and 7311 transitions. [2018-11-12 19:11:18,861 INFO L78 Accepts]: Start accepts. Automaton has 6036 states and 7311 transitions. Word has length 419 [2018-11-12 19:11:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:11:18,861 INFO L480 AbstractCegarLoop]: Abstraction has 6036 states and 7311 transitions. [2018-11-12 19:11:18,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:11:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6036 states and 7311 transitions. [2018-11-12 19:11:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2018-11-12 19:11:18,878 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:11:18,879 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:11:18,879 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:11:18,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:11:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash -34982489, now seen corresponding path program 1 times [2018-11-12 19:11:18,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:11:18,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:11:18,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:11:18,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:11:18,881 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:11:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:11:19,316 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:11:19,528 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:11:19,781 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:11:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 246 proven. 200 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:11:20,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:11:20,452 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:11:20,452 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 432 with the following transitions: [2018-11-12 19:11:20,452 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [662], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:11:20,455 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:11:20,456 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:11:20,751 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:11:20,752 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Performed 5058 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5058 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 19:11:20,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:11:20,760 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:11:21,380 INFO L227 lantSequenceWeakener]: Weakened 92 states. On average, predicates are now at 78.56% of their original sizes. [2018-11-12 19:11:21,380 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:11:22,028 INFO L415 sIntCurrentIteration]: We unified 430 AI predicates to 430 [2018-11-12 19:11:22,028 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:11:22,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:11:22,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-12 19:11:22,029 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:11:22,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:11:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:11:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:11:22,030 INFO L87 Difference]: Start difference. First operand 6036 states and 7311 transitions. Second operand 20 states. [2018-11-12 19:11:29,782 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:11:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:11:48,841 INFO L93 Difference]: Finished difference Result 9697 states and 12445 transitions. [2018-11-12 19:11:48,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-12 19:11:48,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 431 [2018-11-12 19:11:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:11:48,860 INFO L225 Difference]: With dead ends: 9697 [2018-11-12 19:11:48,860 INFO L226 Difference]: Without dead ends: 7413 [2018-11-12 19:11:48,868 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 441 GetRequests, 406 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2018-11-12 19:11:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2018-11-12 19:11:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 6731. [2018-11-12 19:11:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6731 states. [2018-11-12 19:11:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6731 states to 6731 states and 8048 transitions. [2018-11-12 19:11:48,976 INFO L78 Accepts]: Start accepts. Automaton has 6731 states and 8048 transitions. Word has length 431 [2018-11-12 19:11:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:11:48,977 INFO L480 AbstractCegarLoop]: Abstraction has 6731 states and 8048 transitions. [2018-11-12 19:11:48,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:11:48,977 INFO L276 IsEmpty]: Start isEmpty. Operand 6731 states and 8048 transitions. [2018-11-12 19:11:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-11-12 19:11:48,996 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:11:48,996 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:11:48,997 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:11:48,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:11:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1208234952, now seen corresponding path program 1 times [2018-11-12 19:11:48,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:11:48,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:11:48,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:11:48,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:11:48,998 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:11:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:11:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 321 proven. 165 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-11-12 19:11:49,667 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:11:49,667 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:11:49,668 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 457 with the following transitions: [2018-11-12 19:11:49,668 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [550], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:11:49,670 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:11:49,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:11:49,951 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:11:49,951 INFO L272 AbstractInterpreter]: Visited 122 different actions 360 times. Merged at 7 different actions 16 times. Never widened. Performed 4354 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4354 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:11:49,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:11:49,959 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:11:50,464 INFO L227 lantSequenceWeakener]: Weakened 152 states. On average, predicates are now at 78.05% of their original sizes. [2018-11-12 19:11:50,464 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:11:50,848 INFO L415 sIntCurrentIteration]: We unified 455 AI predicates to 455 [2018-11-12 19:11:50,849 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:11:50,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:11:50,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 23 [2018-11-12 19:11:50,850 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:11:50,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 19:11:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 19:11:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2018-11-12 19:11:50,852 INFO L87 Difference]: Start difference. First operand 6731 states and 8048 transitions. Second operand 19 states. [2018-11-12 19:12:00,621 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:12:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:12:12,657 INFO L93 Difference]: Finished difference Result 10679 states and 13430 transitions. [2018-11-12 19:12:12,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-12 19:12:12,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 456 [2018-11-12 19:12:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:12:12,678 INFO L225 Difference]: With dead ends: 10679 [2018-11-12 19:12:12,679 INFO L226 Difference]: Without dead ends: 8395 [2018-11-12 19:12:12,686 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 468 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2018-11-12 19:12:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8395 states. [2018-11-12 19:12:12,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8395 to 8187. [2018-11-12 19:12:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8187 states. [2018-11-12 19:12:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8187 states to 8187 states and 9674 transitions. [2018-11-12 19:12:12,825 INFO L78 Accepts]: Start accepts. Automaton has 8187 states and 9674 transitions. Word has length 456 [2018-11-12 19:12:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:12:12,826 INFO L480 AbstractCegarLoop]: Abstraction has 8187 states and 9674 transitions. [2018-11-12 19:12:12,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 19:12:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8187 states and 9674 transitions. [2018-11-12 19:12:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-11-12 19:12:12,850 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:12:12,850 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:12:12,851 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:12:12,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:12:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash -459172996, now seen corresponding path program 1 times [2018-11-12 19:12:12,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:12:12,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:12:12,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:12:12,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:12:12,852 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:12:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:12:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 19:12:13,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:12:13,509 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:12:13,509 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 483 with the following transitions: [2018-11-12 19:12:13,510 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [413], [415], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:12:13,512 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:12:13,512 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:12:13,798 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:12:14,025 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:12:14,025 INFO L272 AbstractInterpreter]: Visited 123 different actions 611 times. Merged at 8 different actions 43 times. Widened at 1 different actions 1 times. Performed 7161 root evaluator evaluations with a maximum evaluation depth of 6. Performed 7161 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:12:14,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:12:14,037 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:12:14,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:12:14,037 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:12:14,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:12:14,505 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:12:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:12:14,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:12:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 19:12:15,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:12:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 538 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 19:12:16,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:12:16,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 19:12:16,368 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:12:16,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 19:12:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 19:12:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:12:16,370 INFO L87 Difference]: Start difference. First operand 8187 states and 9674 transitions. Second operand 9 states. Received shutdown request... [2018-11-12 19:12:19,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 19:12:19,640 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:12:19,645 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:12:19,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:12:19 BoogieIcfgContainer [2018-11-12 19:12:19,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:12:19,646 INFO L168 Benchmark]: Toolchain (without parser) took 226156.91 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 3.0 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 19:12:19,647 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:12:19,647 INFO L168 Benchmark]: CACSL2BoogieTranslator took 787.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 19:12:19,648 INFO L168 Benchmark]: Boogie Procedure Inliner took 174.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -832.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2018-11-12 19:12:19,649 INFO L168 Benchmark]: Boogie Preprocessor took 95.81 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 19:12:19,650 INFO L168 Benchmark]: RCFGBuilder took 3754.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 123.9 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:12:19,650 INFO L168 Benchmark]: TraceAbstraction took 221340.32 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -462.0 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. [2018-11-12 19:12:19,655 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 787.16 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 174.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -832.8 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 95.81 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 3754.53 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 123.9 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221340.32 ms. Allocated memory was 2.3 GB in the beginning and 4.5 GB in the end (delta: 2.3 GB). Free memory was 2.1 GB in the beginning and 2.6 GB in the end (delta: -462.0 MB). Peak memory consumption was 1.8 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 175]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 175). Cancelled while BasicCegarLoop was constructing difference of abstraction (8187states) and FLOYD_HOARE automaton (currently 20 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (9714 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 221.2s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 193.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2458 SDtfs, 30257 SDslu, 2330 SDs, 0 SdLazy, 30142 SolverSat, 3524 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.2s Time, PredicateUnifierStatistics: 18 DeclaredPredicates, 4554 GetRequests, 4282 SyntacticMatches, 10 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8187occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.0s AbstIntTime, 10 AbstIntIterations, 9 AbstIntStrong, 0.9974233287596092 AbsIntWeakeningRatio, 0.08330922765403528 AbsIntAvgWeakeningVarsNumRemoved, 14.716517211455018 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 3445 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 4671 NumberOfCodeBlocks, 4671 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 5139 ConstructedInterpolants, 0 QuantifiedInterpolants, 11864937 SizeOfPredicates, 0 NumberOfNonLiveVariables, 742 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 5102/6638 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown