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_label54_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:32:43,407 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:32:43,409 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:32:43,427 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:32:43,427 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:32:43,429 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:32:43,431 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:32:43,434 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:32:43,443 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:32:43,444 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:32:43,446 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:32:43,446 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:32:43,447 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:32:43,450 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:32:43,453 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:32:43,454 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:32:43,455 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:32:43,460 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:32:43,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:32:43,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:32:43,469 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:32:43,471 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:32:43,475 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:32:43,475 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:32:43,476 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:32:43,477 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:32:43,478 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:32:43,479 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:32:43,481 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:32:43,483 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:32:43,484 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:32:43,485 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:32:43,485 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:32:43,485 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:32:43,486 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:32:43,487 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:32:43,487 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 16:32:43,516 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:32:43,516 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:32:43,518 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:32:43,518 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:32:43,518 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:32:43,518 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:32:43,518 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:32:43,519 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:32:43,519 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:32:43,519 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:32:43,519 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:32:43,519 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:32:43,520 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:32:43,521 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:32:43,521 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:32:43,521 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:32:43,521 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:32:43,521 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:32:43,523 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:32:43,523 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:32:43,524 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:32:43,524 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:32:43,524 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:32:43,525 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:32:43,525 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:32:43,525 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:32:43,525 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:32:43,525 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:32:43,526 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:32:43,526 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:32:43,526 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:32:43,526 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:32:43,526 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:32:43,527 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:32:43,527 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:32:43,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:32:43,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:32:43,614 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:32:43,616 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:32:43,616 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:32:43,617 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-11-12 16:32:43,702 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5b530a0/a3ef82be9c8447cda9ef2f3f301d1769/FLAGa761cef26 [2018-11-12 16:32:44,303 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:32:44,304 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-11-12 16:32:44,318 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5b530a0/a3ef82be9c8447cda9ef2f3f301d1769/FLAGa761cef26 [2018-11-12 16:32:44,338 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c5b530a0/a3ef82be9c8447cda9ef2f3f301d1769 [2018-11-12 16:32:44,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:32:44,353 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:32:44,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:32:44,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:32:44,361 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:32:44,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:44" (1/1) ... [2018-11-12 16:32:44,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2b0430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:44, skipping insertion in model container [2018-11-12 16:32:44,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:32:44" (1/1) ... [2018-11-12 16:32:44,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:32:44,447 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:32:44,928 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:32:44,934 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:32:45,091 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:32:45,110 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:32:45,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45 WrapperNode [2018-11-12 16:32:45,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:32:45,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:32:45,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:32:45,113 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:32:45,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:32:45,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:32:45,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:32:45,266 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:32:45,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... [2018-11-12 16:32:45,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:32:45,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:32:45,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:32:45,387 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:32:45,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:32:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:32:45,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:32:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:32:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:32:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:32:45,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:32:45,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:32:45,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:32:45,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:32:48,920 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:32:48,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:48 BoogieIcfgContainer [2018-11-12 16:32:48,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:32:48,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:32:48,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:32:48,925 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:32:48,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:32:44" (1/3) ... [2018-11-12 16:32:48,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33306459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:48, skipping insertion in model container [2018-11-12 16:32:48,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:32:45" (2/3) ... [2018-11-12 16:32:48,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33306459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:32:48, skipping insertion in model container [2018-11-12 16:32:48,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:32:48" (3/3) ... [2018-11-12 16:32:48,929 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label54_false-unreach-call_false-termination.c [2018-11-12 16:32:48,940 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:32:48,947 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:32:48,962 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:32:49,002 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:32:49,002 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:32:49,002 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:32:49,003 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:32:49,003 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:32:49,003 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:32:49,003 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:32:49,003 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:32:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-12 16:32:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-12 16:32:49,038 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:49,040 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:49,042 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:49,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:49,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204119, now seen corresponding path program 1 times [2018-11-12 16:32:49,051 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:49,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:49,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:49,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:49,103 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:32:49,281 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:32:49,282 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:32:49,282 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:49,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:32:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:32:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:32:49,307 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-12 16:32:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:51,718 INFO L93 Difference]: Finished difference Result 707 states and 1242 transitions. [2018-11-12 16:32:51,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:32:51,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-12 16:32:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:51,739 INFO L225 Difference]: With dead ends: 707 [2018-11-12 16:32:51,739 INFO L226 Difference]: Without dead ends: 450 [2018-11-12 16:32:51,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:32:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2018-11-12 16:32:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2018-11-12 16:32:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-11-12 16:32:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 678 transitions. [2018-11-12 16:32:51,835 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 678 transitions. Word has length 13 [2018-11-12 16:32:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:51,835 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 678 transitions. [2018-11-12 16:32:51,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:32:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 678 transitions. [2018-11-12 16:32:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-12 16:32:51,840 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:51,840 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:51,840 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:51,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1515047808, now seen corresponding path program 1 times [2018-11-12 16:32:51,841 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:51,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:51,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:51,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:51,843 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:32:52,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:32:52,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:32:52,107 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:52,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:32:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:32:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:32:52,110 INFO L87 Difference]: Start difference. First operand 450 states and 678 transitions. Second operand 3 states. [2018-11-12 16:32:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:32:53,677 INFO L93 Difference]: Finished difference Result 1260 states and 1959 transitions. [2018-11-12 16:32:53,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:32:53,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2018-11-12 16:32:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:32:53,685 INFO L225 Difference]: With dead ends: 1260 [2018-11-12 16:32:53,686 INFO L226 Difference]: Without dead ends: 816 [2018-11-12 16:32:53,690 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:32:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2018-11-12 16:32:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2018-11-12 16:32:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2018-11-12 16:32:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1139 transitions. [2018-11-12 16:32:53,751 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1139 transitions. Word has length 97 [2018-11-12 16:32:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:32:53,753 INFO L480 AbstractCegarLoop]: Abstraction has 816 states and 1139 transitions. [2018-11-12 16:32:53,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:32:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1139 transitions. [2018-11-12 16:32:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-12 16:32:53,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:32:53,757 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:32:53,757 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:32:53,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash -966929960, now seen corresponding path program 1 times [2018-11-12 16:32:53,758 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:32:53,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:53,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:32:53,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:32:53,760 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:32:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:32:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:32:54,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:32:54,078 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:32:54,079 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 110 with the following transitions: [2018-11-12 16:32:54,081 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:32:54,143 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:32:54,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:32:54,781 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:32:54,787 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Performed 832 root evaluator evaluations with a maximum evaluation depth of 6. Performed 832 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 24 variables. [2018-11-12 16:32:54,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:32:54,834 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:32:55,198 INFO L227 lantSequenceWeakener]: Weakened 103 states. On average, predicates are now at 76.96% of their original sizes. [2018-11-12 16:32:55,198 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:32:55,551 INFO L415 sIntCurrentIteration]: We unified 108 AI predicates to 108 [2018-11-12 16:32:55,552 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:32:55,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:32:55,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 16:32:55,554 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:32:55,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:32:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:32:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 16:32:55,558 INFO L87 Difference]: Start difference. First operand 816 states and 1139 transitions. Second operand 7 states. [2018-11-12 16:32:57,860 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:05,940 INFO L93 Difference]: Finished difference Result 1811 states and 2515 transitions. [2018-11-12 16:33:05,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:33:05,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2018-11-12 16:33:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:05,947 INFO L225 Difference]: With dead ends: 1811 [2018-11-12 16:33:05,948 INFO L226 Difference]: Without dead ends: 1001 [2018-11-12 16:33:05,951 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:33:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2018-11-12 16:33:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2018-11-12 16:33:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2018-11-12 16:33:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1330 transitions. [2018-11-12 16:33:05,985 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1330 transitions. Word has length 109 [2018-11-12 16:33:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:05,986 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 1330 transitions. [2018-11-12 16:33:05,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:33:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1330 transitions. [2018-11-12 16:33:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-12 16:33:05,992 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:05,992 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:05,992 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:05,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044886, now seen corresponding path program 1 times [2018-11-12 16:33:05,993 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:05,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:05,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:05,995 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:06,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:06,486 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:06,692 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:33:06,933 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:07,385 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 16:33:07,576 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-11-12 16:33:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:33:07,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:07,873 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:07,873 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-11-12 16:33:07,874 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:07,879 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:07,879 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:08,332 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:08,332 INFO L272 AbstractInterpreter]: Visited 104 different actions 204 times. Merged at 5 different actions 7 times. Never widened. Performed 2668 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2668 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:33:08,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:08,371 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:08,847 INFO L227 lantSequenceWeakener]: Weakened 71 states. On average, predicates are now at 77.49% of their original sizes. [2018-11-12 16:33:08,848 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:10,382 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-11-12 16:33:10,382 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:10,383 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:10,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [28] imperfect sequences [12] total 38 [2018-11-12 16:33:10,383 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:10,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-12 16:33:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-12 16:33:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2018-11-12 16:33:10,385 INFO L87 Difference]: Start difference. First operand 999 states and 1330 transitions. Second operand 28 states. [2018-11-12 16:33:20,433 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:32,075 INFO L93 Difference]: Finished difference Result 2525 states and 3402 transitions. [2018-11-12 16:33:32,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-12 16:33:32,076 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 194 [2018-11-12 16:33:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:32,085 INFO L225 Difference]: With dead ends: 2525 [2018-11-12 16:33:32,085 INFO L226 Difference]: Without dead ends: 1715 [2018-11-12 16:33:32,090 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2018-11-12 16:33:32,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2018-11-12 16:33:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1707. [2018-11-12 16:33:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2018-11-12 16:33:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2071 transitions. [2018-11-12 16:33:32,145 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2071 transitions. Word has length 194 [2018-11-12 16:33:32,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:32,146 INFO L480 AbstractCegarLoop]: Abstraction has 1707 states and 2071 transitions. [2018-11-12 16:33:32,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-12 16:33:32,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2071 transitions. [2018-11-12 16:33:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-11-12 16:33:32,150 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:32,151 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:32,151 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:32,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash -71904578, now seen corresponding path program 1 times [2018-11-12 16:33:32,152 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:32,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:32,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:32,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:32,153 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:32,697 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:33:32,911 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:33:33,314 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-12 16:33:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:33:33,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:33,516 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:33,516 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-11-12 16:33:33,516 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:33,520 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:33,520 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:33,679 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:33,679 INFO L272 AbstractInterpreter]: Visited 119 different actions 234 times. Merged at 5 different actions 7 times. Never widened. Performed 3006 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3006 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-12 16:33:33,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:33,698 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:34,017 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-12 16:33:34,018 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:34,795 INFO L415 sIntCurrentIteration]: We unified 219 AI predicates to 219 [2018-11-12 16:33:34,795 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:34,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:34,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 31 [2018-11-12 16:33:34,796 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:34,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:33:34,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:33:34,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:33:34,798 INFO L87 Difference]: Start difference. First operand 1707 states and 2071 transitions. Second operand 18 states. [2018-11-12 16:33:41,942 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:33:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:49,649 INFO L93 Difference]: Finished difference Result 2888 states and 3640 transitions. [2018-11-12 16:33:49,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-12 16:33:49,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 220 [2018-11-12 16:33:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:49,659 INFO L225 Difference]: With dead ends: 2888 [2018-11-12 16:33:49,659 INFO L226 Difference]: Without dead ends: 2078 [2018-11-12 16:33:49,663 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 238 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2018-11-12 16:33:49,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2018-11-12 16:33:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1892. [2018-11-12 16:33:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2018-11-12 16:33:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2263 transitions. [2018-11-12 16:33:49,713 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2263 transitions. Word has length 220 [2018-11-12 16:33:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:49,714 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 2263 transitions. [2018-11-12 16:33:49,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:33:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2263 transitions. [2018-11-12 16:33:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-12 16:33:49,718 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:49,718 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:33:49,719 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:49,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2114463494, now seen corresponding path program 1 times [2018-11-12 16:33:49,719 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:49,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:49,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:49,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:49,721 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-12 16:33:49,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:33:49,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:33:49,977 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:49,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:33:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:33:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:33:49,978 INFO L87 Difference]: Start difference. First operand 1892 states and 2263 transitions. Second operand 4 states. [2018-11-12 16:33:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:33:51,626 INFO L93 Difference]: Finished difference Result 3434 states and 4635 transitions. [2018-11-12 16:33:51,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:33:51,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2018-11-12 16:33:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:33:51,651 INFO L225 Difference]: With dead ends: 3434 [2018-11-12 16:33:51,651 INFO L226 Difference]: Without dead ends: 2624 [2018-11-12 16:33:51,659 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:33:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2018-11-12 16:33:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2624. [2018-11-12 16:33:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2018-11-12 16:33:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3318 transitions. [2018-11-12 16:33:51,745 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3318 transitions. Word has length 234 [2018-11-12 16:33:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:33:51,746 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 3318 transitions. [2018-11-12 16:33:51,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:33:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3318 transitions. [2018-11-12 16:33:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-12 16:33:51,753 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:33:51,754 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-12 16:33:51,754 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:33:51,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash 303357292, now seen corresponding path program 1 times [2018-11-12 16:33:51,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:33:51,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:51,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:33:51,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:33:51,756 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:33:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:33:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 106 proven. 95 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-12 16:33:52,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:33:52,144 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:33:52,144 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-12 16:33:52,144 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [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], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:33:52,148 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:33:52,148 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:33:52,994 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:33:52,995 INFO L272 AbstractInterpreter]: Visited 120 different actions 355 times. Merged at 7 different actions 17 times. Never widened. Performed 4957 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4957 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:33:53,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:33:53,007 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:33:53,504 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 77.66% of their original sizes. [2018-11-12 16:33:53,504 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:33:54,082 INFO L415 sIntCurrentIteration]: We unified 304 AI predicates to 304 [2018-11-12 16:33:54,082 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:33:54,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:33:54,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [6] total 28 [2018-11-12 16:33:54,082 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:33:54,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-12 16:33:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-12 16:33:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:33:54,084 INFO L87 Difference]: Start difference. First operand 2624 states and 3318 transitions. Second operand 24 states. [2018-11-12 16:34:02,853 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:09,716 INFO L93 Difference]: Finished difference Result 5260 states and 6850 transitions. [2018-11-12 16:34:09,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-12 16:34:09,717 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 305 [2018-11-12 16:34:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:09,734 INFO L225 Difference]: With dead ends: 5260 [2018-11-12 16:34:09,735 INFO L226 Difference]: Without dead ends: 3718 [2018-11-12 16:34:09,745 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 322 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2018-11-12 16:34:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2018-11-12 16:34:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3185. [2018-11-12 16:34:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2018-11-12 16:34:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3914 transitions. [2018-11-12 16:34:09,839 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3914 transitions. Word has length 305 [2018-11-12 16:34:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:09,840 INFO L480 AbstractCegarLoop]: Abstraction has 3185 states and 3914 transitions. [2018-11-12 16:34:09,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-12 16:34:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3914 transitions. [2018-11-12 16:34:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-12 16:34:09,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:09,846 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:34:09,847 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:09,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:09,847 INFO L82 PathProgramCache]: Analyzing trace with hash -695505714, now seen corresponding path program 1 times [2018-11-12 16:34:09,847 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:09,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:09,848 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:09,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:09,849 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:10,155 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:34:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 156 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-12 16:34:10,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:10,428 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:10,429 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-12 16:34:10,429 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:10,432 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:10,432 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:10,547 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:10,631 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:34:10,631 INFO L272 AbstractInterpreter]: Visited 120 different actions 354 times. Merged at 7 different actions 16 times. Never widened. Performed 3405 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3405 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 16:34:10,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:10,639 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:34:10,938 INFO L227 lantSequenceWeakener]: Weakened 302 states. On average, predicates are now at 79.79% of their original sizes. [2018-11-12 16:34:10,938 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:34:11,027 INFO L415 sIntCurrentIteration]: We unified 304 AI predicates to 304 [2018-11-12 16:34:11,027 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:34:11,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:34:11,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-12 16:34:11,028 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:11,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:34:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:34:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:34:11,029 INFO L87 Difference]: Start difference. First operand 3185 states and 3914 transitions. Second operand 10 states. [2018-11-12 16:34:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:15,748 INFO L93 Difference]: Finished difference Result 5495 states and 7237 transitions. [2018-11-12 16:34:15,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:34:15,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 305 [2018-11-12 16:34:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:15,764 INFO L225 Difference]: With dead ends: 5495 [2018-11-12 16:34:15,765 INFO L226 Difference]: Without dead ends: 3953 [2018-11-12 16:34:15,773 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 312 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:34:15,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2018-11-12 16:34:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3931. [2018-11-12 16:34:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3931 states. [2018-11-12 16:34:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 4814 transitions. [2018-11-12 16:34:15,866 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 4814 transitions. Word has length 305 [2018-11-12 16:34:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:15,867 INFO L480 AbstractCegarLoop]: Abstraction has 3931 states and 4814 transitions. [2018-11-12 16:34:15,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:34:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 4814 transitions. [2018-11-12 16:34:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-12 16:34:15,875 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:15,876 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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 16:34:15,876 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:15,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1390657654, now seen corresponding path program 1 times [2018-11-12 16:34:15,876 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:15,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:15,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:15,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:15,878 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-12 16:34:16,108 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:34:16,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-12 16:34:16,108 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:16,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:34:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:34:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:34:16,109 INFO L87 Difference]: Start difference. First operand 3931 states and 4814 transitions. Second operand 3 states. [2018-11-12 16:34:17,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:17,334 INFO L93 Difference]: Finished difference Result 7134 states and 9434 transitions. [2018-11-12 16:34:17,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:34:17,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2018-11-12 16:34:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:17,356 INFO L225 Difference]: With dead ends: 7134 [2018-11-12 16:34:17,356 INFO L226 Difference]: Without dead ends: 4846 [2018-11-12 16:34:17,369 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 16:34:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2018-11-12 16:34:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4846. [2018-11-12 16:34:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4846 states. [2018-11-12 16:34:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4846 states to 4846 states and 5947 transitions. [2018-11-12 16:34:17,483 INFO L78 Accepts]: Start accepts. Automaton has 4846 states and 5947 transitions. Word has length 319 [2018-11-12 16:34:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:17,484 INFO L480 AbstractCegarLoop]: Abstraction has 4846 states and 5947 transitions. [2018-11-12 16:34:17,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:34:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4846 states and 5947 transitions. [2018-11-12 16:34:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-11-12 16:34:17,500 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:17,500 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:17,501 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:17,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1833483425, now seen corresponding path program 1 times [2018-11-12 16:34:17,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:17,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:17,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:17,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:17,503 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:18,105 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-11-12 16:34:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 313 proven. 161 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-12 16:34:18,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:18,559 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:18,559 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 404 with the following transitions: [2018-11-12 16:34:18,559 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [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], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:18,562 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:18,562 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:18,667 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:18,926 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:18,926 INFO L272 AbstractInterpreter]: Visited 122 different actions 602 times. Merged at 8 different actions 39 times. Widened at 1 different actions 1 times. Performed 6118 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6118 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 16:34:18,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:18,934 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:18,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:18,934 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:18,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:18,943 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:19,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:19,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:19,562 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:34:19,930 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 16:34:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 16:34:20,175 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:20,712 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-12 16:34:21,337 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-12 16:34:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-12 16:34:21,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:21,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:34:21,929 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:21,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:34:21,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:34:21,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:34:21,931 INFO L87 Difference]: Start difference. First operand 4846 states and 5947 transitions. Second operand 17 states. [2018-11-12 16:34:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:29,714 INFO L93 Difference]: Finished difference Result 11436 states and 15147 transitions. [2018-11-12 16:34:29,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-12 16:34:29,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 403 [2018-11-12 16:34:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:29,743 INFO L225 Difference]: With dead ends: 11436 [2018-11-12 16:34:29,743 INFO L226 Difference]: Without dead ends: 4550 [2018-11-12 16:34:29,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-12 16:34:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2018-11-12 16:34:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 3610. [2018-11-12 16:34:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2018-11-12 16:34:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 4203 transitions. [2018-11-12 16:34:29,895 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 4203 transitions. Word has length 403 [2018-11-12 16:34:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:29,896 INFO L480 AbstractCegarLoop]: Abstraction has 3610 states and 4203 transitions. [2018-11-12 16:34:29,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:34:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 4203 transitions. [2018-11-12 16:34:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-11-12 16:34:29,904 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:29,904 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:29,904 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:29,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1139655653, now seen corresponding path program 1 times [2018-11-12 16:34:29,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:29,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:29,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:29,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:29,906 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:30,262 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-12 16:34:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 44 proven. 185 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-12 16:34:30,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:30,530 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:30,530 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2018-11-12 16:34:30,531 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:30,534 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:30,534 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:30,687 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:31,275 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 16:34:31,275 INFO L272 AbstractInterpreter]: Visited 183 different actions 732 times. Merged at 8 different actions 33 times. Widened at 1 different actions 1 times. Performed 8678 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8678 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:34:31,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:31,313 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 16:34:31,811 INFO L227 lantSequenceWeakener]: Weakened 405 states. On average, predicates are now at 79.92% of their original sizes. [2018-11-12 16:34:31,811 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 16:34:32,149 INFO L415 sIntCurrentIteration]: We unified 407 AI predicates to 407 [2018-11-12 16:34:32,149 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 16:34:32,149 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:34:32,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2018-11-12 16:34:32,150 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:32,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:34:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:34:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:34:32,151 INFO L87 Difference]: Start difference. First operand 3610 states and 4203 transitions. Second operand 10 states. [2018-11-12 16:34:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:36,719 INFO L93 Difference]: Finished difference Result 7738 states and 9235 transitions. [2018-11-12 16:34:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-12 16:34:36,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 408 [2018-11-12 16:34:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:36,737 INFO L225 Difference]: With dead ends: 7738 [2018-11-12 16:34:36,737 INFO L226 Difference]: Without dead ends: 4502 [2018-11-12 16:34:36,747 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 415 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-12 16:34:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2018-11-12 16:34:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4469. [2018-11-12 16:34:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4469 states. [2018-11-12 16:34:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 5103 transitions. [2018-11-12 16:34:36,840 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 5103 transitions. Word has length 408 [2018-11-12 16:34:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:36,841 INFO L480 AbstractCegarLoop]: Abstraction has 4469 states and 5103 transitions. [2018-11-12 16:34:36,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:34:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 5103 transitions. [2018-11-12 16:34:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-11-12 16:34:36,857 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:36,857 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:34:36,858 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:36,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:36,858 INFO L82 PathProgramCache]: Analyzing trace with hash -992715388, now seen corresponding path program 1 times [2018-11-12 16:34:36,858 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:36,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:36,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:36,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:36,859 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-11-12 16:34:38,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:38,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:38,137 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-11-12 16:34:38,137 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:38,140 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:38,140 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:38,306 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:38,957 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:38,957 INFO L272 AbstractInterpreter]: Visited 192 different actions 966 times. Merged at 10 different actions 54 times. Widened at 1 different actions 2 times. Performed 11276 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11276 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-12 16:34:38,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:38,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:38,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:38,963 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:38,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:38,973 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:39,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 666 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-11-12 16:34:39,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-11-12 16:34:39,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:39,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-12 16:34:39,789 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:39,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 16:34:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 16:34:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-12 16:34:39,791 INFO L87 Difference]: Start difference. First operand 4469 states and 5103 transitions. Second operand 7 states. [2018-11-12 16:34:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:42,895 INFO L93 Difference]: Finished difference Result 11229 states and 14985 transitions. [2018-11-12 16:34:42,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-12 16:34:42,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 607 [2018-11-12 16:34:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:42,936 INFO L225 Difference]: With dead ends: 11229 [2018-11-12 16:34:42,937 INFO L226 Difference]: Without dead ends: 7134 [2018-11-12 16:34:42,960 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1216 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:34:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7134 states. [2018-11-12 16:34:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7134 to 6930. [2018-11-12 16:34:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6930 states. [2018-11-12 16:34:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 8300 transitions. [2018-11-12 16:34:43,168 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 8300 transitions. Word has length 607 [2018-11-12 16:34:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:43,169 INFO L480 AbstractCegarLoop]: Abstraction has 6930 states and 8300 transitions. [2018-11-12 16:34:43,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 16:34:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 8300 transitions. [2018-11-12 16:34:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-11-12 16:34:43,191 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:43,192 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 16:34:43,192 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:43,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1365388396, now seen corresponding path program 1 times [2018-11-12 16:34:43,193 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:43,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:43,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:43,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:43,194 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2018-11-12 16:34:43,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:34:43,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:34:43,796 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:34:43,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:34:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:34:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:34:43,797 INFO L87 Difference]: Start difference. First operand 6930 states and 8300 transitions. Second operand 4 states. [2018-11-12 16:34:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:45,340 INFO L93 Difference]: Finished difference Result 20124 states and 26318 transitions. [2018-11-12 16:34:45,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:34:45,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 663 [2018-11-12 16:34:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:45,390 INFO L225 Difference]: With dead ends: 20124 [2018-11-12 16:34:45,390 INFO L226 Difference]: Without dead ends: 9658 [2018-11-12 16:34:45,464 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:34:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9658 states. [2018-11-12 16:34:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9658 to 9475. [2018-11-12 16:34:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9475 states. [2018-11-12 16:34:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9475 states to 9475 states and 11305 transitions. [2018-11-12 16:34:45,713 INFO L78 Accepts]: Start accepts. Automaton has 9475 states and 11305 transitions. Word has length 663 [2018-11-12 16:34:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:45,715 INFO L480 AbstractCegarLoop]: Abstraction has 9475 states and 11305 transitions. [2018-11-12 16:34:45,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:34:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9475 states and 11305 transitions. [2018-11-12 16:34:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2018-11-12 16:34:45,737 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:45,737 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2018-11-12 16:34:45,737 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:45,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash -675509568, now seen corresponding path program 1 times [2018-11-12 16:34:45,738 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:45,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:45,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:45,739 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-12 16:34:46,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:46,939 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:46,940 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 734 with the following transitions: [2018-11-12 16:34:46,940 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:46,943 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:46,943 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:47,110 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:48,066 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:48,066 INFO L272 AbstractInterpreter]: Visited 192 different actions 1153 times. Merged at 10 different actions 61 times. Widened at 1 different actions 1 times. Performed 14410 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14410 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 16 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-12 16:34:48,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:48,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:48,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:48,072 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:48,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:48,081 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:48,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-12 16:34:48,530 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-12 16:34:48,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:48,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-12 16:34:48,962 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:48,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:34:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:34:48,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-12 16:34:48,964 INFO L87 Difference]: Start difference. First operand 9475 states and 11305 transitions. Second operand 10 states. [2018-11-12 16:34:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:34:52,318 INFO L93 Difference]: Finished difference Result 23067 states and 28811 transitions. [2018-11-12 16:34:52,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-12 16:34:52,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 733 [2018-11-12 16:34:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:34:52,389 INFO L225 Difference]: With dead ends: 23067 [2018-11-12 16:34:52,390 INFO L226 Difference]: Without dead ends: 13966 [2018-11-12 16:34:52,444 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1475 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-11-12 16:34:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13966 states. [2018-11-12 16:34:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13966 to 13761. [2018-11-12 16:34:52,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13761 states. [2018-11-12 16:34:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13761 states to 13761 states and 16059 transitions. [2018-11-12 16:34:52,738 INFO L78 Accepts]: Start accepts. Automaton has 13761 states and 16059 transitions. Word has length 733 [2018-11-12 16:34:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:34:52,739 INFO L480 AbstractCegarLoop]: Abstraction has 13761 states and 16059 transitions. [2018-11-12 16:34:52,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:34:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13761 states and 16059 transitions. [2018-11-12 16:34:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-11-12 16:34:52,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:34:52,770 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:34:52,770 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:34:52,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2016796591, now seen corresponding path program 1 times [2018-11-12 16:34:52,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:34:52,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:52,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:52,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:34:52,772 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:34:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 408 proven. 890 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-11-12 16:34:54,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:54,987 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:34:54,988 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 814 with the following transitions: [2018-11-12 16:34:54,988 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:34:54,991 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:34:54,991 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:34:55,208 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:34:56,123 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:34:56,123 INFO L272 AbstractInterpreter]: Visited 193 different actions 1161 times. Merged at 11 different actions 63 times. Widened at 1 different actions 1 times. Performed 15757 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15757 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 18 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-12 16:34:56,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:34:56,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:34:56,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:34:56,129 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:34:56,137 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:34:56,138 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:34:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:34:56,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:34:57,410 WARN L179 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-11-12 16:34:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 1252 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2018-11-12 16:34:57,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:34:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 465 proven. 221 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2018-11-12 16:34:58,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:34:58,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-12 16:34:58,968 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:34:58,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:34:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:34:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:34:58,970 INFO L87 Difference]: Start difference. First operand 13761 states and 16059 transitions. Second operand 17 states. [2018-11-12 16:34:59,667 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2018-11-12 16:35:00,160 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2018-11-12 16:35:02,762 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2018-11-12 16:35:03,197 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-11-12 16:35:03,868 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-12 16:35:07,046 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2018-11-12 16:35:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:07,872 INFO L93 Difference]: Finished difference Result 30346 states and 35762 transitions. [2018-11-12 16:35:07,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-12 16:35:07,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 813 [2018-11-12 16:35:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:07,923 INFO L225 Difference]: With dead ends: 30346 [2018-11-12 16:35:07,923 INFO L226 Difference]: Without dead ends: 16052 [2018-11-12 16:35:07,961 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1657 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=873, Invalid=3549, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 16:35:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2018-11-12 16:35:08,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 15752. [2018-11-12 16:35:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2018-11-12 16:35:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 18127 transitions. [2018-11-12 16:35:08,256 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 18127 transitions. Word has length 813 [2018-11-12 16:35:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:08,257 INFO L480 AbstractCegarLoop]: Abstraction has 15752 states and 18127 transitions. [2018-11-12 16:35:08,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:35:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 18127 transitions. [2018-11-12 16:35:08,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2018-11-12 16:35:08,284 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:08,285 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:08,285 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:08,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 749842866, now seen corresponding path program 1 times [2018-11-12 16:35:08,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:08,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:08,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:08,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:08,287 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 588 proven. 221 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2018-11-12 16:35:09,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:09,303 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:09,303 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 918 with the following transitions: [2018-11-12 16:35:09,303 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:09,307 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:09,307 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:09,466 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:10,272 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:10,273 INFO L272 AbstractInterpreter]: Visited 194 different actions 1176 times. Merged at 12 different actions 72 times. Widened at 1 different actions 3 times. Performed 13482 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13482 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 22 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:35:10,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:10,279 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:10,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:10,279 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:10,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:10,294 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:10,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1563 proven. 2 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2018-11-12 16:35:11,179 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 588 proven. 221 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2018-11-12 16:35:11,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:11,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-12 16:35:11,816 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:11,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:35:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:35:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:35:11,818 INFO L87 Difference]: Start difference. First operand 15752 states and 18127 transitions. Second operand 6 states. [2018-11-12 16:35:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:13,606 INFO L93 Difference]: Finished difference Result 32903 states and 38261 transitions. [2018-11-12 16:35:13,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 16:35:13,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 917 [2018-11-12 16:35:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:13,665 INFO L225 Difference]: With dead ends: 32903 [2018-11-12 16:35:13,666 INFO L226 Difference]: Without dead ends: 17525 [2018-11-12 16:35:13,711 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1846 GetRequests, 1835 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:35:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17525 states. [2018-11-12 16:35:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17525 to 16856. [2018-11-12 16:35:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16856 states. [2018-11-12 16:35:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 19065 transitions. [2018-11-12 16:35:14,007 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 19065 transitions. Word has length 917 [2018-11-12 16:35:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:14,008 INFO L480 AbstractCegarLoop]: Abstraction has 16856 states and 19065 transitions. [2018-11-12 16:35:14,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:35:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 19065 transitions. [2018-11-12 16:35:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2018-11-12 16:35:14,034 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:14,035 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:35:14,035 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:14,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1292338358, now seen corresponding path program 1 times [2018-11-12 16:35:14,036 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:14,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:14,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:14,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:14,037 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:14,898 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:35:15,095 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:35:15,320 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-12 16:35:15,644 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-12 16:35:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 450 proven. 1418 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-11-12 16:35:18,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:18,113 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:18,113 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1013 with the following transitions: [2018-11-12 16:35:18,113 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:18,116 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:18,116 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:18,345 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:19,352 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:19,353 INFO L272 AbstractInterpreter]: Visited 195 different actions 1187 times. Merged at 12 different actions 77 times. Widened at 1 different actions 3 times. Performed 14070 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14070 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 26 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:35:19,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:19,361 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:19,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:19,361 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:19,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:19,376 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:19,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 1992 proven. 2 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2018-11-12 16:35:20,369 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:20,561 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2018-11-12 16:35:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 451 proven. 470 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-11-12 16:35:21,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:21,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-12 16:35:21,457 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:21,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-12 16:35:21,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-12 16:35:21,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:35:21,459 INFO L87 Difference]: Start difference. First operand 16856 states and 19065 transitions. Second operand 18 states. [2018-11-12 16:35:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:30,705 INFO L93 Difference]: Finished difference Result 31663 states and 35984 transitions. [2018-11-12 16:35:30,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-12 16:35:30,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1012 [2018-11-12 16:35:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:30,739 INFO L225 Difference]: With dead ends: 31663 [2018-11-12 16:35:30,739 INFO L226 Difference]: Without dead ends: 15181 [2018-11-12 16:35:30,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2115 GetRequests, 2051 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=830, Invalid=3460, Unknown=0, NotChecked=0, Total=4290 [2018-11-12 16:35:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15181 states. [2018-11-12 16:35:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15181 to 14835. [2018-11-12 16:35:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14835 states. [2018-11-12 16:35:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14835 states to 14835 states and 16206 transitions. [2018-11-12 16:35:31,020 INFO L78 Accepts]: Start accepts. Automaton has 14835 states and 16206 transitions. Word has length 1012 [2018-11-12 16:35:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:31,021 INFO L480 AbstractCegarLoop]: Abstraction has 14835 states and 16206 transitions. [2018-11-12 16:35:31,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-12 16:35:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 14835 states and 16206 transitions. [2018-11-12 16:35:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2018-11-12 16:35:31,044 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:31,045 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2018-11-12 16:35:31,045 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:31,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1156216731, now seen corresponding path program 1 times [2018-11-12 16:35:31,046 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:31,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:31,047 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1127 proven. 223 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-11-12 16:35:32,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:32,559 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:32,559 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1058 with the following transitions: [2018-11-12 16:35:32,560 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:32,563 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:32,563 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:32,729 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:33,578 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:33,579 INFO L272 AbstractInterpreter]: Visited 195 different actions 1195 times. Merged at 13 different actions 85 times. Widened at 1 different actions 3 times. Performed 14360 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14360 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 26 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-12 16:35:33,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:33,588 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:33,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:33,588 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:33,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:33,598 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:33,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1903 proven. 6 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-11-12 16:35:34,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1127 proven. 296 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2018-11-12 16:35:35,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:35,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-12 16:35:35,785 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:35,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:35:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:35:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-12 16:35:35,787 INFO L87 Difference]: Start difference. First operand 14835 states and 16206 transitions. Second operand 9 states. [2018-11-12 16:35:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:39,476 INFO L93 Difference]: Finished difference Result 33569 states and 37038 transitions. [2018-11-12 16:35:39,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 16:35:39,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1057 [2018-11-12 16:35:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:39,514 INFO L225 Difference]: With dead ends: 33569 [2018-11-12 16:35:39,514 INFO L226 Difference]: Without dead ends: 19108 [2018-11-12 16:35:39,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2131 GetRequests, 2112 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:35:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19108 states. [2018-11-12 16:35:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19108 to 16995. [2018-11-12 16:35:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16995 states. [2018-11-12 16:35:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16995 states to 16995 states and 18739 transitions. [2018-11-12 16:35:39,813 INFO L78 Accepts]: Start accepts. Automaton has 16995 states and 18739 transitions. Word has length 1057 [2018-11-12 16:35:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:39,814 INFO L480 AbstractCegarLoop]: Abstraction has 16995 states and 18739 transitions. [2018-11-12 16:35:39,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:35:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16995 states and 18739 transitions. [2018-11-12 16:35:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2018-11-12 16:35:39,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:39,831 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 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, 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] [2018-11-12 16:35:39,832 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:39,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1655208758, now seen corresponding path program 1 times [2018-11-12 16:35:39,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:39,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:39,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:39,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:39,834 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:41,126 WARN L179 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-12 16:35:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 846 proven. 860 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2018-11-12 16:35:42,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:42,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:42,954 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1210 with the following transitions: [2018-11-12 16:35:42,955 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:42,958 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:42,958 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:43,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:44,034 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:44,034 INFO L272 AbstractInterpreter]: Visited 196 different actions 999 times. Merged at 14 different actions 67 times. Widened at 1 different actions 2 times. Performed 11897 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11897 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 23 fixpoints after 6 different actions. Largest state had 24 variables. [2018-11-12 16:35:44,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:44,040 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:44,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:44,040 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:44,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:44,049 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:44,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 1778 proven. 2 refuted. 0 times theorem prover too weak. 2306 trivial. 0 not checked. [2018-11-12 16:35:45,472 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:35:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 855 proven. 112 refuted. 0 times theorem prover too weak. 3119 trivial. 0 not checked. [2018-11-12 16:35:47,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:35:47,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:35:47,139 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:35:47,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:35:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:35:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:35:47,141 INFO L87 Difference]: Start difference. First operand 16995 states and 18739 transitions. Second operand 17 states. [2018-11-12 16:35:51,136 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2018-11-12 16:35:53,338 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2018-11-12 16:35:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:35:53,882 INFO L93 Difference]: Finished difference Result 34251 states and 37839 transitions. [2018-11-12 16:35:53,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-12 16:35:53,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1209 [2018-11-12 16:35:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:35:53,923 INFO L225 Difference]: With dead ends: 34251 [2018-11-12 16:35:53,923 INFO L226 Difference]: Without dead ends: 17630 [2018-11-12 16:35:53,952 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2487 GetRequests, 2437 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=508, Invalid=2042, Unknown=0, NotChecked=0, Total=2550 [2018-11-12 16:35:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17630 states. [2018-11-12 16:35:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17630 to 16849. [2018-11-12 16:35:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16849 states. [2018-11-12 16:35:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16849 states to 16849 states and 18528 transitions. [2018-11-12 16:35:54,313 INFO L78 Accepts]: Start accepts. Automaton has 16849 states and 18528 transitions. Word has length 1209 [2018-11-12 16:35:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:35:54,314 INFO L480 AbstractCegarLoop]: Abstraction has 16849 states and 18528 transitions. [2018-11-12 16:35:54,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:35:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16849 states and 18528 transitions. [2018-11-12 16:35:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1533 [2018-11-12 16:35:54,343 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:35:54,344 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 2, 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 16:35:54,345 INFO L423 AbstractCegarLoop]: === Iteration 20 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:35:54,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 136064099, now seen corresponding path program 1 times [2018-11-12 16:35:54,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:35:54,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:54,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:54,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:35:54,347 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:35:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6522 backedges. 1341 proven. 2 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2018-11-12 16:35:56,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:56,270 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:35:56,270 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1533 with the following transitions: [2018-11-12 16:35:56,270 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [662], [663], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:35:56,272 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:35:56,272 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:35:56,417 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:35:57,265 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:35:57,265 INFO L272 AbstractInterpreter]: Visited 201 different actions 1231 times. Merged at 15 different actions 85 times. Widened at 1 different actions 1 times. Performed 15143 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15143 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 37 fixpoints after 6 different actions. Largest state had 24 variables. [2018-11-12 16:35:57,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:35:57,272 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:35:57,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:35:57,272 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:35:57,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:35:57,282 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:35:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:35:57,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:35:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6522 backedges. 1341 proven. 2 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2018-11-12 16:35:58,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:36:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6522 backedges. 1341 proven. 2 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2018-11-12 16:36:00,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:36:00,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 16:36:00,312 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:36:00,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 16:36:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 16:36:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-12 16:36:00,314 INFO L87 Difference]: Start difference. First operand 16849 states and 18528 transitions. Second operand 10 states. [2018-11-12 16:36:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:36:02,749 INFO L93 Difference]: Finished difference Result 34934 states and 38702 transitions. [2018-11-12 16:36:02,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 16:36:02,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1532 [2018-11-12 16:36:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:36:02,759 INFO L225 Difference]: With dead ends: 34934 [2018-11-12 16:36:02,759 INFO L226 Difference]: Without dead ends: 5674 [2018-11-12 16:36:02,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3088 GetRequests, 3068 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2018-11-12 16:36:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2018-11-12 16:36:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5276. [2018-11-12 16:36:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5276 states. [2018-11-12 16:36:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5276 states to 5276 states and 5507 transitions. [2018-11-12 16:36:02,869 INFO L78 Accepts]: Start accepts. Automaton has 5276 states and 5507 transitions. Word has length 1532 [2018-11-12 16:36:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:36:02,870 INFO L480 AbstractCegarLoop]: Abstraction has 5276 states and 5507 transitions. [2018-11-12 16:36:02,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 16:36:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 5276 states and 5507 transitions. [2018-11-12 16:36:02,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2018-11-12 16:36:02,889 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:36:02,890 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 2, 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 16:36:02,890 INFO L423 AbstractCegarLoop]: === Iteration 21 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:36:02,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:36:02,891 INFO L82 PathProgramCache]: Analyzing trace with hash -641386390, now seen corresponding path program 1 times [2018-11-12 16:36:02,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:36:02,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:36:02,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:36:02,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:36:02,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:36:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:36:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6529 backedges. 1100 proven. 1084 refuted. 0 times theorem prover too weak. 4345 trivial. 0 not checked. [2018-11-12 16:36:05,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:36:05,915 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:36:05,915 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1534 with the following transitions: [2018-11-12 16:36:05,916 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:36:05,919 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:36:05,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:36:05,990 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:36:06,838 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:36:06,838 INFO L272 AbstractInterpreter]: Visited 201 different actions 1028 times. Merged at 15 different actions 71 times. Widened at 1 different actions 1 times. Performed 12109 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12109 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 27 fixpoints after 8 different actions. Largest state had 24 variables. [2018-11-12 16:36:06,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:36:06,845 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:36:06,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:36:06,845 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:36:06,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:36:06,855 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:36:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:36:07,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:36:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6529 backedges. 2308 proven. 2 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2018-11-12 16:36:08,341 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:36:08,536 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-11-12 16:36:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6529 backedges. 1109 proven. 112 refuted. 0 times theorem prover too weak. 5308 trivial. 0 not checked. [2018-11-12 16:36:10,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:36:10,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-12 16:36:10,393 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:36:10,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-12 16:36:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-12 16:36:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:36:10,396 INFO L87 Difference]: Start difference. First operand 5276 states and 5507 transitions. Second operand 17 states. [2018-11-12 16:36:13,810 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-11-12 16:36:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:36:16,440 INFO L93 Difference]: Finished difference Result 10754 states and 11236 transitions. [2018-11-12 16:36:16,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-12 16:36:16,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 1533 [2018-11-12 16:36:16,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:36:16,451 INFO L225 Difference]: With dead ends: 10754 [2018-11-12 16:36:16,452 INFO L226 Difference]: Without dead ends: 5130 [2018-11-12 16:36:16,459 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3133 GetRequests, 3084 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=501, Invalid=1949, Unknown=0, NotChecked=0, Total=2450 [2018-11-12 16:36:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2018-11-12 16:36:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 4922. [2018-11-12 16:36:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4922 states. [2018-11-12 16:36:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 5115 transitions. [2018-11-12 16:36:16,545 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 5115 transitions. Word has length 1533 [2018-11-12 16:36:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:36:16,546 INFO L480 AbstractCegarLoop]: Abstraction has 4922 states and 5115 transitions. [2018-11-12 16:36:16,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-12 16:36:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 5115 transitions. [2018-11-12 16:36:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1753 [2018-11-12 16:36:16,578 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:36:16,579 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 9, 9, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 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] [2018-11-12 16:36:16,580 INFO L423 AbstractCegarLoop]: === Iteration 22 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:36:16,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:36:16,580 INFO L82 PathProgramCache]: Analyzing trace with hash -501005841, now seen corresponding path program 1 times [2018-11-12 16:36:16,581 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:36:16,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:36:16,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:36:16,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:36:16,582 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) Received shutdown request... [2018-11-12 16:36:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-12 16:36:16,727 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-12 16:36:16,728 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-12 16:36:16,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:36:16,740 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-12 16:36:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:36:17,084 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1753 with the following transitions: [2018-11-12 16:36:17,085 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [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], [634], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [670], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [778], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-12 16:36:17,088 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:36:17,088 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:36:17,091 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-12 16:36:17,091 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-12 16:36:17,091 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 16:36:17,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:36:17,091 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:36:17,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:36:17,108 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:36:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:36:17,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:36:17,532 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-12 16:36:17,734 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 16:36:17,734 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:36:17,739 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:36:17,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:36:17 BoogieIcfgContainer [2018-11-12 16:36:17,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:36:17,740 INFO L168 Benchmark]: Toolchain (without parser) took 213388.58 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 1.5 GB in the end (delta: -28.9 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,741 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 16:36:17,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.46 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 154.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -862.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,743 INFO L168 Benchmark]: Boogie Preprocessor took 120.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,743 INFO L168 Benchmark]: RCFGBuilder took 3534.71 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: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,744 INFO L168 Benchmark]: TraceAbstraction took 208817.61 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 633.8 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-11-12 16:36:17,755 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 756.46 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: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 154.20 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 749.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -862.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.22 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3534.71 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: 130.0 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 208817.61 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.5 GB in the end (delta: 633.8 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 22]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 22). Cancelled while BasicCegarLoop was analyzing trace of length 1753 with TraceHistMax 14,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 208.7s OverallTime, 22 OverallIterations, 14 TraceHistogramMax, 134.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3221 SDtfs, 40218 SDslu, 3924 SDs, 0 SdLazy, 50426 SolverSat, 6425 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.1s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 21747 GetRequests, 21220 SyntacticMatches, 13 SemanticMatches, 514 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 27.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16995occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 13.0s AbstIntTime, 17 AbstIntIterations, 6 AbstIntStrong, 0.9967672002810918 AbsIntWeakeningRatio, 0.10944625407166124 AbsIntAvgWeakeningVarsNumRemoved, 15.877524429967426 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 7131 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 34.6s InterpolantComputationTime, 22499 NumberOfCodeBlocks, 22499 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 32274 ConstructedInterpolants, 0 QuantifiedInterpolants, 95544267 SizeOfPredicates, 24 NumberOfNonLiveVariables, 13684 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 85265/92071 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown