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_label45_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:06:32,559 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:06:32,563 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:06:32,575 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:06:32,576 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:06:32,577 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:06:32,578 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:06:32,580 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:06:32,582 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:06:32,583 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:06:32,583 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:06:32,584 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:06:32,585 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:06:32,586 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:06:32,587 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:06:32,588 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:06:32,589 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:06:32,591 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:06:32,593 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:06:32,595 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:06:32,596 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:06:32,597 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:06:32,603 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:06:32,603 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:06:32,603 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:06:32,608 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:06:32,609 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:06:32,610 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:06:32,612 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:06:32,614 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:06:32,614 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:06:32,614 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 19:06:32,615 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 19:06:32,615 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 19:06:32,617 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 19:06:32,618 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 19:06:32,619 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 19:06:32,639 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:06:32,639 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:06:32,640 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:06:32,640 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:06:32,640 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:06:32,640 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:06:32,641 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:06:32,641 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:06:32,641 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:06:32,641 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:06:32,641 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:06:32,642 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:06:32,642 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:06:32,643 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:06:32,643 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:06:32,643 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:06:32,643 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:06:32,643 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:06:32,644 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:06:32,644 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:06:32,644 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:06:32,644 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:06:32,645 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:06:32,645 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:06:32,645 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:06:32,645 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:06:32,645 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:06:32,646 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:06:32,646 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:06:32,646 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:06:32,646 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:06:32,646 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:06:32,647 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:06:32,647 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:06:32,647 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:06:32,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:06:32,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:06:32,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:06:32,739 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:06:32,739 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:06:32,740 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-11-12 19:06:32,817 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cc34d73/a6f9b401bcf240febad543511cbffa38/FLAGd8a1eb0b1 [2018-11-12 19:06:33,387 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:06:33,393 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45_true-unreach-call_false-termination.c [2018-11-12 19:06:33,415 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cc34d73/a6f9b401bcf240febad543511cbffa38/FLAGd8a1eb0b1 [2018-11-12 19:06:33,437 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65cc34d73/a6f9b401bcf240febad543511cbffa38 [2018-11-12 19:06:33,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:06:33,452 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:06:33,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:06:33,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:06:33,462 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:06:33,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:06:33" (1/1) ... [2018-11-12 19:06:33,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfe8fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:33, skipping insertion in model container [2018-11-12 19:06:33,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:06:33" (1/1) ... [2018-11-12 19:06:33,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:06:33,552 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:06:34,105 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:06:34,111 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:06:34,333 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:06:34,361 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:06:34,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34 WrapperNode [2018-11-12 19:06:34,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:06:34,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:06:34,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:06:34,363 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:06:34,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:06:34,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:06:34,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:06:34,528 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:06:34,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (1/1) ... [2018-11-12 19:06:34,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:06:34,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:06:34,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:06:34,661 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:06:34,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (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 19:06:34,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:06:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:06:34,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:06:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:06:34,735 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:06:34,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:06:34,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:06:34,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:06:34,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:06:38,259 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:06:38,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:06:38 BoogieIcfgContainer [2018-11-12 19:06:38,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:06:38,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:06:38,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:06:38,265 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:06:38,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:06:33" (1/3) ... [2018-11-12 19:06:38,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116862fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:06:38, skipping insertion in model container [2018-11-12 19:06:38,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:06:34" (2/3) ... [2018-11-12 19:06:38,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@116862fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:06:38, skipping insertion in model container [2018-11-12 19:06:38,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:06:38" (3/3) ... [2018-11-12 19:06:38,269 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label45_true-unreach-call_false-termination.c [2018-11-12 19:06:38,278 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:06:38,287 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:06:38,302 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:06:38,342 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:06:38,342 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:06:38,343 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:06:38,343 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:06:38,343 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:06:38,343 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:06:38,343 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:06:38,344 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:06:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 19:06:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-11-12 19:06:38,384 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:38,385 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] [2018-11-12 19:06:38,387 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:38,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1525638783, now seen corresponding path program 1 times [2018-11-12 19:06:38,395 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:38,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:38,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:38,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:38,452 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:38,830 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 19:06:38,833 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:38,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:06:38,834 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:38,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:06:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:06:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:38,860 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 4 states. [2018-11-12 19:06:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:41,681 INFO L93 Difference]: Finished difference Result 894 states and 1610 transitions. [2018-11-12 19:06:41,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:06:41,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-11-12 19:06:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:41,707 INFO L225 Difference]: With dead ends: 894 [2018-11-12 19:06:41,707 INFO L226 Difference]: Without dead ends: 633 [2018-11-12 19:06:41,720 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 19:06:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2018-11-12 19:06:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 434. [2018-11-12 19:06:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-12 19:06:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 662 transitions. [2018-11-12 19:06:41,812 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 662 transitions. Word has length 43 [2018-11-12 19:06:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:41,813 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 662 transitions. [2018-11-12 19:06:41,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:06:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 662 transitions. [2018-11-12 19:06:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-11-12 19:06:41,820 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:41,821 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:41,821 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:41,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2115089016, now seen corresponding path program 1 times [2018-11-12 19:06:41,822 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:41,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:41,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:41,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:41,824 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:42,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:42,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:06:42,077 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:42,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:06:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:06:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:42,080 INFO L87 Difference]: Start difference. First operand 434 states and 662 transitions. Second operand 4 states. [2018-11-12 19:06:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:44,871 INFO L93 Difference]: Finished difference Result 1594 states and 2534 transitions. [2018-11-12 19:06:44,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:06:44,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2018-11-12 19:06:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:44,887 INFO L225 Difference]: With dead ends: 1594 [2018-11-12 19:06:44,887 INFO L226 Difference]: Without dead ends: 780 [2018-11-12 19:06:44,894 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2018-11-12 19:06:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2018-11-12 19:06:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2018-11-12 19:06:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1153 transitions. [2018-11-12 19:06:44,938 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1153 transitions. Word has length 127 [2018-11-12 19:06:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:44,939 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 1153 transitions. [2018-11-12 19:06:44,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:06:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1153 transitions. [2018-11-12 19:06:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-11-12 19:06:44,943 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:44,943 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:06:44,946 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:44,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash -385622320, now seen corresponding path program 1 times [2018-11-12 19:06:44,947 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:44,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:44,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:44,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:44,948 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:45,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:06:45,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:06:45,172 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:45,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:06:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:06:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:45,173 INFO L87 Difference]: Start difference. First operand 780 states and 1153 transitions. Second operand 4 states. [2018-11-12 19:06:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:06:47,495 INFO L93 Difference]: Finished difference Result 3018 states and 4609 transitions. [2018-11-12 19:06:47,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:06:47,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2018-11-12 19:06:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:06:47,513 INFO L225 Difference]: With dead ends: 3018 [2018-11-12 19:06:47,514 INFO L226 Difference]: Without dead ends: 2244 [2018-11-12 19:06:47,525 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:06:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2018-11-12 19:06:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2244. [2018-11-12 19:06:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2244 states. [2018-11-12 19:06:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 3156 transitions. [2018-11-12 19:06:47,605 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 3156 transitions. Word has length 139 [2018-11-12 19:06:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:06:47,606 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 3156 transitions. [2018-11-12 19:06:47,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:06:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 3156 transitions. [2018-11-12 19:06:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-11-12 19:06:47,620 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:06:47,621 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:06:47,621 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:06:47,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1047456719, now seen corresponding path program 1 times [2018-11-12 19:06:47,622 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:06:47,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:47,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:06:47,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:06:47,623 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:06:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:06:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:06:47,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:06:47,976 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:06:47,977 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 260 with the following transitions: [2018-11-12 19:06:47,979 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:06:48,031 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:06:48,031 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:06:48,683 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:06:48,686 INFO L272 AbstractInterpreter]: Visited 125 different actions 125 times. Never merged. Never widened. Performed 1107 root evaluator evaluations with a maximum evaluation depth of 6. Performed 1107 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 19:06:48,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:06:48,733 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:06:49,353 INFO L227 lantSequenceWeakener]: Weakened 250 states. On average, predicates are now at 77.72% of their original sizes. [2018-11-12 19:06:49,353 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:06:49,730 INFO L415 sIntCurrentIteration]: We unified 258 AI predicates to 258 [2018-11-12 19:06:49,731 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:06:49,735 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:06:49,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 19:06:49,735 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:06:49,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 19:06:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 19:06:49,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 19:06:49,737 INFO L87 Difference]: Start difference. First operand 2244 states and 3156 transitions. Second operand 7 states. [2018-11-12 19:06:51,896 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:05,376 INFO L93 Difference]: Finished difference Result 4667 states and 6540 transitions. [2018-11-12 19:07:05,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:07:05,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2018-11-12 19:07:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:05,393 INFO L225 Difference]: With dead ends: 4667 [2018-11-12 19:07:05,393 INFO L226 Difference]: Without dead ends: 2429 [2018-11-12 19:07:05,408 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 259 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 19:07:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2018-11-12 19:07:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2018-11-12 19:07:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2427 states. [2018-11-12 19:07:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3347 transitions. [2018-11-12 19:07:05,490 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3347 transitions. Word has length 259 [2018-11-12 19:07:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 2427 states and 3347 transitions. [2018-11-12 19:07:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 19:07:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3347 transitions. [2018-11-12 19:07:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-11-12 19:07:05,502 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:05,502 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:05,503 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:05,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash -643952831, now seen corresponding path program 1 times [2018-11-12 19:07:05,503 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:05,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:05,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:05,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:05,506 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:06,009 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 196 proven. 173 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:06,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:06,644 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:06,645 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 345 with the following transitions: [2018-11-12 19:07:06,645 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:06,651 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:06,652 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:06,996 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:06,997 INFO L272 AbstractInterpreter]: Visited 129 different actions 251 times. Merged at 4 different actions 4 times. Never widened. Performed 2583 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2583 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 19:07:07,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:07,041 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:07,865 INFO L227 lantSequenceWeakener]: Weakened 153 states. On average, predicates are now at 77.42% of their original sizes. [2018-11-12 19:07:07,866 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:09,206 INFO L415 sIntCurrentIteration]: We unified 343 AI predicates to 343 [2018-11-12 19:07:09,207 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:09,207 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:09,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [12] total 32 [2018-11-12 19:07:09,207 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:09,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 19:07:09,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 19:07:09,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-12 19:07:09,209 INFO L87 Difference]: Start difference. First operand 2427 states and 3347 transitions. Second operand 22 states. [2018-11-12 19:07:17,250 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:30,615 INFO L93 Difference]: Finished difference Result 5514 states and 7437 transitions. [2018-11-12 19:07:30,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:07:30,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 344 [2018-11-12 19:07:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:30,631 INFO L225 Difference]: With dead ends: 5514 [2018-11-12 19:07:30,632 INFO L226 Difference]: Without dead ends: 2797 [2018-11-12 19:07:30,648 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 352 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2018-11-12 19:07:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2018-11-12 19:07:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2795. [2018-11-12 19:07:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2795 states. [2018-11-12 19:07:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3723 transitions. [2018-11-12 19:07:30,721 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3723 transitions. Word has length 344 [2018-11-12 19:07:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:30,722 INFO L480 AbstractCegarLoop]: Abstraction has 2795 states and 3723 transitions. [2018-11-12 19:07:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 19:07:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3723 transitions. [2018-11-12 19:07:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-11-12 19:07:30,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:30,734 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:30,734 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:30,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash 58481173, now seen corresponding path program 1 times [2018-11-12 19:07:30,735 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:30,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:30,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:30,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:30,736 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:31,219 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:31,419 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:07:31,650 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 207 proven. 199 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:32,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:32,660 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:32,661 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 371 with the following transitions: [2018-11-12 19:07:32,661 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:32,665 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:32,666 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:32,875 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:32,875 INFO L272 AbstractInterpreter]: Visited 129 different actions 254 times. Merged at 5 different actions 7 times. Never widened. Performed 3357 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3357 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 19:07:32,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:32,880 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:33,299 INFO L227 lantSequenceWeakener]: Weakened 146 states. On average, predicates are now at 78.39% of their original sizes. [2018-11-12 19:07:33,300 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:33,869 INFO L415 sIntCurrentIteration]: We unified 369 AI predicates to 369 [2018-11-12 19:07:33,869 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:33,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:33,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [15] total 33 [2018-11-12 19:07:33,870 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:33,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 19:07:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 19:07:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:07:33,872 INFO L87 Difference]: Start difference. First operand 2795 states and 3723 transitions. Second operand 20 states. [2018-11-12 19:07:41,256 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:07:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:07:48,852 INFO L93 Difference]: Finished difference Result 5403 states and 7324 transitions. [2018-11-12 19:07:48,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:07:48,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 370 [2018-11-12 19:07:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:07:48,867 INFO L225 Difference]: With dead ends: 5403 [2018-11-12 19:07:48,868 INFO L226 Difference]: Without dead ends: 3165 [2018-11-12 19:07:48,882 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 385 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2018-11-12 19:07:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2018-11-12 19:07:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2980. [2018-11-12 19:07:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2980 states. [2018-11-12 19:07:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 3915 transitions. [2018-11-12 19:07:48,957 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 3915 transitions. Word has length 370 [2018-11-12 19:07:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:07:48,958 INFO L480 AbstractCegarLoop]: Abstraction has 2980 states and 3915 transitions. [2018-11-12 19:07:48,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 19:07:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 3915 transitions. [2018-11-12 19:07:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2018-11-12 19:07:48,971 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:07:48,971 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:07:48,972 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:07:48,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 13558729, now seen corresponding path program 1 times [2018-11-12 19:07:48,972 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:07:48,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:48,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:07:48,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:07:48,974 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:07:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:07:49,499 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:07:49,694 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:07:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 207 proven. 208 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:07:50,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:07:50,492 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:07:50,492 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 381 with the following transitions: [2018-11-12 19:07:50,493 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:07:50,497 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:07:50,497 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:07:50,689 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:07:50,690 INFO L272 AbstractInterpreter]: Visited 130 different actions 253 times. Merged at 4 different actions 4 times. Never widened. Performed 3324 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3324 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 19:07:50,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:07:50,699 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:07:51,200 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 19:07:51,200 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:07:51,783 INFO L415 sIntCurrentIteration]: We unified 379 AI predicates to 379 [2018-11-12 19:07:51,783 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:07:51,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:07:51,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [12] total 27 [2018-11-12 19:07:51,784 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:07:51,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:07:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:07:51,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-11-12 19:07:51,786 INFO L87 Difference]: Start difference. First operand 2980 states and 3915 transitions. Second operand 17 states. [2018-11-12 19:07:58,260 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:09,222 INFO L93 Difference]: Finished difference Result 5887 states and 7816 transitions. [2018-11-12 19:08:09,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 19:08:09,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 380 [2018-11-12 19:08:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:09,235 INFO L225 Difference]: With dead ends: 5887 [2018-11-12 19:08:09,235 INFO L226 Difference]: Without dead ends: 3170 [2018-11-12 19:08:09,249 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 387 GetRequests, 358 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-11-12 19:08:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2018-11-12 19:08:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 2982. [2018-11-12 19:08:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2018-11-12 19:08:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 3916 transitions. [2018-11-12 19:08:09,321 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 3916 transitions. Word has length 380 [2018-11-12 19:08:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:09,322 INFO L480 AbstractCegarLoop]: Abstraction has 2982 states and 3916 transitions. [2018-11-12 19:08:09,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 19:08:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 3916 transitions. [2018-11-12 19:08:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-11-12 19:08:09,336 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:09,336 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 19:08:09,336 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:09,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1536953169, now seen corresponding path program 1 times [2018-11-12 19:08:09,337 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:09,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:09,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:09,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:09,338 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:09,683 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 19:08:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 246 proven. 124 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 19:08:10,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:10,245 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:10,245 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 385 with the following transitions: [2018-11-12 19:08:10,245 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:08:10,248 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:10,249 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:10,395 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:10,525 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:10,525 INFO L272 AbstractInterpreter]: Visited 129 different actions 381 times. Merged at 7 different actions 16 times. Never widened. Performed 3896 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3896 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 19:08:10,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:10,526 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:10,854 INFO L227 lantSequenceWeakener]: Weakened 381 states. On average, predicates are now at 80.2% of their original sizes. [2018-11-12 19:08:10,855 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:10,932 INFO L415 sIntCurrentIteration]: We unified 383 AI predicates to 383 [2018-11-12 19:08:10,932 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:10,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:10,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-12 19:08:10,933 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:10,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:08:10,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:08:10,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:08:10,934 INFO L87 Difference]: Start difference. First operand 2982 states and 3916 transitions. Second operand 10 states. [2018-11-12 19:08:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:15,374 INFO L93 Difference]: Finished difference Result 5791 states and 7973 transitions. [2018-11-12 19:08:15,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 19:08:15,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 384 [2018-11-12 19:08:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:15,393 INFO L225 Difference]: With dead ends: 5791 [2018-11-12 19:08:15,394 INFO L226 Difference]: Without dead ends: 3553 [2018-11-12 19:08:15,406 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 391 GetRequests, 375 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 19:08:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2018-11-12 19:08:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3541. [2018-11-12 19:08:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3541 states. [2018-11-12 19:08:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 4633 transitions. [2018-11-12 19:08:15,499 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 4633 transitions. Word has length 384 [2018-11-12 19:08:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:15,500 INFO L480 AbstractCegarLoop]: Abstraction has 3541 states and 4633 transitions. [2018-11-12 19:08:15,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 19:08:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 4633 transitions. [2018-11-12 19:08:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2018-11-12 19:08:15,518 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:15,518 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:15,519 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:15,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1364763422, now seen corresponding path program 1 times [2018-11-12 19:08:15,519 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:15,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:15,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:15,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:15,521 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:16,054 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:16,255 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 19:08:16,458 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:16,898 WARN L179 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-12 19:08:17,182 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 19:08:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 121 proven. 294 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:17,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:17,658 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:17,659 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 406 with the following transitions: [2018-11-12 19:08:17,659 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [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 19:08:17,662 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:17,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:17,899 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:17,899 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Performed 4218 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4218 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 19:08:17,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:17,904 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:18,522 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 19:08:18,523 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:19,107 INFO L415 sIntCurrentIteration]: We unified 404 AI predicates to 404 [2018-11-12 19:08:19,107 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:19,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:19,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [12] total 27 [2018-11-12 19:08:19,108 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:19,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:08:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:08:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-11-12 19:08:19,109 INFO L87 Difference]: Start difference. First operand 3541 states and 4633 transitions. Second operand 17 states. [2018-11-12 19:08:26,505 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:36,461 INFO L93 Difference]: Finished difference Result 7005 states and 9252 transitions. [2018-11-12 19:08:36,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 19:08:36,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 405 [2018-11-12 19:08:36,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:36,477 INFO L225 Difference]: With dead ends: 7005 [2018-11-12 19:08:36,477 INFO L226 Difference]: Without dead ends: 3729 [2018-11-12 19:08:36,485 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 412 GetRequests, 383 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-11-12 19:08:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2018-11-12 19:08:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3541. [2018-11-12 19:08:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3541 states. [2018-11-12 19:08:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 4633 transitions. [2018-11-12 19:08:36,568 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 4633 transitions. Word has length 405 [2018-11-12 19:08:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:36,569 INFO L480 AbstractCegarLoop]: Abstraction has 3541 states and 4633 transitions. [2018-11-12 19:08:36,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 19:08:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 4633 transitions. [2018-11-12 19:08:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-11-12 19:08:36,580 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:36,580 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:36,581 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:36,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 795964789, now seen corresponding path program 1 times [2018-11-12 19:08:36,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:36,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:36,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:36,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:36,582 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 195 proven. 220 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:37,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:37,428 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:37,428 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 419 with the following transitions: [2018-11-12 19:08:37,429 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [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 19:08:37,431 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:37,431 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:37,704 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:37,704 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Performed 4661 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4661 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 19:08:37,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:37,712 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:38,294 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 19:08:38,294 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:38,908 INFO L415 sIntCurrentIteration]: We unified 417 AI predicates to 417 [2018-11-12 19:08:38,909 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:38,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:38,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [12] total 28 [2018-11-12 19:08:38,910 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:38,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:08:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:08:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:08:38,912 INFO L87 Difference]: Start difference. First operand 3541 states and 4633 transitions. Second operand 18 states. [2018-11-12 19:08:45,340 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:08:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:08:56,328 INFO L93 Difference]: Finished difference Result 7005 states and 9252 transitions. [2018-11-12 19:08:56,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 19:08:56,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 418 [2018-11-12 19:08:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:08:56,343 INFO L225 Difference]: With dead ends: 7005 [2018-11-12 19:08:56,344 INFO L226 Difference]: Without dead ends: 3729 [2018-11-12 19:08:56,351 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 426 GetRequests, 395 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2018-11-12 19:08:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2018-11-12 19:08:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3541. [2018-11-12 19:08:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3541 states. [2018-11-12 19:08:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 4633 transitions. [2018-11-12 19:08:56,423 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 4633 transitions. Word has length 418 [2018-11-12 19:08:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:08:56,424 INFO L480 AbstractCegarLoop]: Abstraction has 3541 states and 4633 transitions. [2018-11-12 19:08:56,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:08:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 4633 transitions. [2018-11-12 19:08:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-11-12 19:08:56,434 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:08:56,434 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:56,435 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:08:56,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash -888009651, now seen corresponding path program 1 times [2018-11-12 19:08:56,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:08:56,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:56,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:08:56,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:08:56,437 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:08:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:08:56,903 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:08:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 183 proven. 232 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:08:57,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:08:57,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:08:57,736 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 431 with the following transitions: [2018-11-12 19:08:57,736 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [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 19:08:57,739 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:08:57,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:08:58,069 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:08:58,069 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Performed 5073 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5073 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 19:08:58,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:08:58,076 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:08:58,701 INFO L227 lantSequenceWeakener]: Weakened 91 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 19:08:58,702 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:08:59,317 INFO L415 sIntCurrentIteration]: We unified 429 AI predicates to 429 [2018-11-12 19:08:59,317 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:08:59,317 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:08:59,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [14] total 30 [2018-11-12 19:08:59,318 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:08:59,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 19:08:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 19:08:59,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:08:59,319 INFO L87 Difference]: Start difference. First operand 3541 states and 4633 transitions. Second operand 18 states. [2018-11-12 19:09:07,802 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:21,705 INFO L93 Difference]: Finished difference Result 7003 states and 9250 transitions. [2018-11-12 19:09:21,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-12 19:09:21,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 430 [2018-11-12 19:09:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:21,717 INFO L225 Difference]: With dead ends: 7003 [2018-11-12 19:09:21,717 INFO L226 Difference]: Without dead ends: 3727 [2018-11-12 19:09:21,725 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 437 GetRequests, 407 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2018-11-12 19:09:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2018-11-12 19:09:21,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3539. [2018-11-12 19:09:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3539 states. [2018-11-12 19:09:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4631 transitions. [2018-11-12 19:09:21,795 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4631 transitions. Word has length 430 [2018-11-12 19:09:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:21,796 INFO L480 AbstractCegarLoop]: Abstraction has 3539 states and 4631 transitions. [2018-11-12 19:09:21,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 19:09:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4631 transitions. [2018-11-12 19:09:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-12 19:09:21,807 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:21,807 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 19:09:21,808 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:21,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash 663653076, now seen corresponding path program 1 times [2018-11-12 19:09:21,808 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:21,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:21,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:21,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:21,809 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:22,849 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 19:09:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 255 proven. 451 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:09:23,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:23,940 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:23,940 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-12 19:09:23,940 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:23,942 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:23,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:24,239 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:24,240 INFO L272 AbstractInterpreter]: Visited 130 different actions 385 times. Merged at 7 different actions 17 times. Never widened. Performed 4652 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4652 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:24,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:24,248 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:24,875 INFO L227 lantSequenceWeakener]: Weakened 109 states. On average, predicates are now at 77.48% of their original sizes. [2018-11-12 19:09:24,875 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:25,674 INFO L415 sIntCurrentIteration]: We unified 457 AI predicates to 457 [2018-11-12 19:09:25,674 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:25,674 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:25,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-12 19:09:25,675 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:25,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-12 19:09:25,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-12 19:09:25,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2018-11-12 19:09:25,676 INFO L87 Difference]: Start difference. First operand 3539 states and 4631 transitions. Second operand 21 states. [2018-11-12 19:09:34,853 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:47,480 INFO L93 Difference]: Finished difference Result 7191 states and 9444 transitions. [2018-11-12 19:09:47,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-12 19:09:47,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 458 [2018-11-12 19:09:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:47,496 INFO L225 Difference]: With dead ends: 7191 [2018-11-12 19:09:47,496 INFO L226 Difference]: Without dead ends: 3915 [2018-11-12 19:09:47,506 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 474 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2018-11-12 19:09:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2018-11-12 19:09:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3912. [2018-11-12 19:09:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3912 states. [2018-11-12 19:09:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 5010 transitions. [2018-11-12 19:09:47,576 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 5010 transitions. Word has length 458 [2018-11-12 19:09:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:47,577 INFO L480 AbstractCegarLoop]: Abstraction has 3912 states and 5010 transitions. [2018-11-12 19:09:47,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-12 19:09:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 5010 transitions. [2018-11-12 19:09:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2018-11-12 19:09:47,589 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:47,590 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:09:47,590 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:47,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:47,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1878977812, now seen corresponding path program 1 times [2018-11-12 19:09:47,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:47,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:47,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:47,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:47,592 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 19:09:48,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:48,061 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:48,061 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 459 with the following transitions: [2018-11-12 19:09:48,061 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:48,063 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:48,063 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:48,091 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:09:48,595 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:09:48,595 INFO L272 AbstractInterpreter]: Visited 131 different actions 646 times. Merged at 8 different actions 38 times. Widened at 1 different actions 1 times. Performed 6930 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6930 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 19:09:48,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:48,605 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:09:48,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:48,605 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 19:09:48,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:48,615 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:09:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:48,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:09:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 19:09:49,123 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:09:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 443 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-11-12 19:09:50,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:09:50,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 19:09:50,487 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:09:50,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 19:09:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 19:09:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2018-11-12 19:09:50,489 INFO L87 Difference]: Start difference. First operand 3912 states and 5010 transitions. Second operand 9 states. [2018-11-12 19:09:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:09:53,623 INFO L93 Difference]: Finished difference Result 8639 states and 12738 transitions. [2018-11-12 19:09:53,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 19:09:53,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 458 [2018-11-12 19:09:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:09:53,658 INFO L225 Difference]: With dead ends: 8639 [2018-11-12 19:09:53,659 INFO L226 Difference]: Without dead ends: 5842 [2018-11-12 19:09:53,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 917 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2018-11-12 19:09:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5842 states. [2018-11-12 19:09:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5842 to 5543. [2018-11-12 19:09:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5543 states. [2018-11-12 19:09:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5543 states to 5543 states and 7383 transitions. [2018-11-12 19:09:53,830 INFO L78 Accepts]: Start accepts. Automaton has 5543 states and 7383 transitions. Word has length 458 [2018-11-12 19:09:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:09:53,831 INFO L480 AbstractCegarLoop]: Abstraction has 5543 states and 7383 transitions. [2018-11-12 19:09:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 19:09:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5543 states and 7383 transitions. [2018-11-12 19:09:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2018-11-12 19:09:53,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:09:53,847 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 19:09:53,847 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:09:53,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 721842360, now seen corresponding path program 1 times [2018-11-12 19:09:53,848 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:09:53,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:53,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:09:53,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:09:53,849 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:09:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:09:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 257 proven. 455 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:09:54,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:09:54,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:09:54,676 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 461 with the following transitions: [2018-11-12 19:09:54,677 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [574], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:09:54,679 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:09:54,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:09:54,900 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 19:09:54,901 INFO L272 AbstractInterpreter]: Visited 130 different actions 385 times. Merged at 7 different actions 17 times. Never widened. Performed 3917 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3917 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 19:09:54,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:09:54,909 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 19:09:55,416 INFO L227 lantSequenceWeakener]: Weakened 135 states. On average, predicates are now at 77.44% of their original sizes. [2018-11-12 19:09:55,417 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 19:09:55,738 INFO L415 sIntCurrentIteration]: We unified 459 AI predicates to 459 [2018-11-12 19:09:55,739 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 19:09:55,739 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 19:09:55,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [16] total 31 [2018-11-12 19:09:55,740 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:09:55,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 19:09:55,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 19:09:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-12 19:09:55,742 INFO L87 Difference]: Start difference. First operand 5543 states and 7383 transitions. Second operand 17 states. [2018-11-12 19:10:04,585 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:10:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:10:15,455 INFO L93 Difference]: Finished difference Result 11047 states and 14739 transitions. [2018-11-12 19:10:15,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-12 19:10:15,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 460 [2018-11-12 19:10:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:10:15,481 INFO L225 Difference]: With dead ends: 11047 [2018-11-12 19:10:15,481 INFO L226 Difference]: Without dead ends: 5353 [2018-11-12 19:10:15,502 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 473 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2018-11-12 19:10:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2018-11-12 19:10:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 4984. [2018-11-12 19:10:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4984 states. [2018-11-12 19:10:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4984 states to 4984 states and 6800 transitions. [2018-11-12 19:10:15,629 INFO L78 Accepts]: Start accepts. Automaton has 4984 states and 6800 transitions. Word has length 460 [2018-11-12 19:10:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:10:15,630 INFO L480 AbstractCegarLoop]: Abstraction has 4984 states and 6800 transitions. [2018-11-12 19:10:15,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 19:10:15,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4984 states and 6800 transitions. [2018-11-12 19:10:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2018-11-12 19:10:15,644 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:10:15,644 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 2, 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 19:10:15,644 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:10:15,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1668643611, now seen corresponding path program 1 times [2018-11-12 19:10:15,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:10:15,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:15,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:10:15,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:10:15,646 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:10:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:10:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 341 proven. 136 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2018-11-12 19:10:16,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:10:16,094 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:10:16,095 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 551 with the following transitions: [2018-11-12 19:10:16,095 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], [245], [247], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [494], [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], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [694], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 19:10:16,097 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:10:16,097 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:10:16,244 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:10:16,605 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:10:16,605 INFO L272 AbstractInterpreter]: Visited 132 different actions 654 times. Merged at 9 different actions 41 times. Widened at 1 different actions 1 times. Performed 6989 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6989 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 19:10:16,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:10:16,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:10:16,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:10:16,622 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:10:16,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:10:16,635 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:10:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:10:16,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:10:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 800 proven. 2 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2018-11-12 19:10:16,986 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:10:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 341 proven. 136 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2018-11-12 19:10:17,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:10:17,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 19:10:17,668 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:10:17,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 19:10:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 19:10:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-12 19:10:17,669 INFO L87 Difference]: Start difference. First operand 4984 states and 6800 transitions. Second operand 10 states. Received shutdown request... [2018-11-12 19:10:21,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 19:10:21,064 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:10:21,069 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:10:21,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:10:21 BoogieIcfgContainer [2018-11-12 19:10:21,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:10:21,071 INFO L168 Benchmark]: Toolchain (without parser) took 227620.13 ms. Allocated memory was 1.5 GB in the beginning and 4.0 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -494.7 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-12 19:10:21,072 INFO L168 Benchmark]: CDTParser took 0.20 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 19:10:21,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 908.18 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: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:21,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 164.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 723.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -812.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:21,074 INFO L168 Benchmark]: Boogie Preprocessor took 131.91 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 19:10:21,074 INFO L168 Benchmark]: RCFGBuilder took 3600.25 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: 133.1 MB). Peak memory consumption was 133.1 MB. Max. memory is 7.1 GB. [2018-11-12 19:10:21,075 INFO L168 Benchmark]: TraceAbstraction took 222808.53 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 139.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-11-12 19:10:21,079 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 908.18 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: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 164.74 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 723.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -812.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.91 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 3600.25 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: 133.1 MB). Peak memory consumption was 133.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222808.53 ms. Allocated memory was 2.3 GB in the beginning and 4.0 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 1.9 GB in the end (delta: 139.3 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 112). Cancelled while BasicCegarLoop was constructing difference of abstraction (4984states) and FLOYD_HOARE automaton (currently 20 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (4912 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 222.7s OverallTime, 15 OverallIterations, 6 TraceHistogramMax, 187.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2839 SDtfs, 26253 SDslu, 2087 SDs, 0 SdLazy, 34329 SolverSat, 3213 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.1s Time, PredicateUnifierStatistics: 20 DeclaredPredicates, 6080 GetRequests, 5763 SyntacticMatches, 27 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5543occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 4.3s AbstIntTime, 12 AbstIntIterations, 10 AbstIntStrong, 0.9973921881536599 AbsIntWeakeningRatio, 0.0836326321190354 AbsIntAvgWeakeningVarsNumRemoved, 12.387891226269883 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 1823 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 6233 NumberOfCodeBlocks, 6233 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 7222 ConstructedInterpolants, 0 QuantifiedInterpolants, 17166431 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1564 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 7262/9900 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown