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_label39_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:01:54,465 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:01:54,467 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:01:54,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:01:54,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:01:54,489 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:01:54,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:01:54,494 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:01:54,495 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:01:54,496 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:01:54,497 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:01:54,498 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:01:54,498 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:01:54,501 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:01:54,505 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:01:54,505 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:01:54,506 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:01:54,515 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:01:54,517 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:01:54,527 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:01:54,528 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:01:54,529 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:01:54,531 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:01:54,531 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:01:54,532 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:01:54,533 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:01:54,534 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:01:54,534 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:01:54,535 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:01:54,537 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:01:54,538 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:01:54,538 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:01:54,538 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:01:54,539 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:01:54,539 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:01:54,542 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:01:54,543 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:01:54,569 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:01:54,569 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:01:54,571 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:01:54,571 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:01:54,572 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:01:54,572 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:01:54,572 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:01:54,573 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:01:54,573 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:01:54,573 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:01:54,573 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:01:54,573 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:01:54,574 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:01:54,574 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:01:54,576 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:01:54,576 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:01:54,576 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:01:54,576 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:01:54,576 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:01:54,577 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:01:54,577 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:01:54,577 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:01:54,577 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:01:54,577 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:01:54,579 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:01:54,579 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:01:54,579 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:01:54,579 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:01:54,580 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:01:54,580 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:01:54,580 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:01:54,580 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:01:54,580 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:01:54,581 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:01:54,582 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:01:54,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:01:54,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:01:54,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:01:54,671 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:01:54,671 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:01:54,672 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label39_false-unreach-call_false-termination.c [2018-11-07 18:01:54,743 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1a835762/eca0e5bae72b43ae8fa9dbe967630dc2/FLAGbd78aacfd [2018-11-07 18:01:55,296 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:01:55,297 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label39_false-unreach-call_false-termination.c [2018-11-07 18:01:55,311 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1a835762/eca0e5bae72b43ae8fa9dbe967630dc2/FLAGbd78aacfd [2018-11-07 18:01:55,329 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1a835762/eca0e5bae72b43ae8fa9dbe967630dc2 [2018-11-07 18:01:55,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:01:55,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:01:55,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:01:55,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:01:55,348 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:01:55,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:01:55" (1/1) ... [2018-11-07 18:01:55,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be785a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:55, skipping insertion in model container [2018-11-07 18:01:55,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:01:55" (1/1) ... [2018-11-07 18:01:55,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:01:55,445 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:01:55,972 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:01:55,978 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:01:56,137 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:01:56,164 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:01:56,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56 WrapperNode [2018-11-07 18:01:56,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:01:56,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:01:56,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:01:56,167 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:01:56,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:01:56,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:01:56,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:01:56,331 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:01:56,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... [2018-11-07 18:01:56,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:01:56,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:01:56,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:01:56,470 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:01:56,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:01:56,544 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:01:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:01:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:01:56,545 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:01:56,545 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:01:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:01:56,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:01:56,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:01:56,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:02:00,077 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:02:00,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:02:00 BoogieIcfgContainer [2018-11-07 18:02:00,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:02:00,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:02:00,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:02:00,083 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:02:00,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:01:55" (1/3) ... [2018-11-07 18:02:00,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b17462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:02:00, skipping insertion in model container [2018-11-07 18:02:00,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:01:56" (2/3) ... [2018-11-07 18:02:00,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b17462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:02:00, skipping insertion in model container [2018-11-07 18:02:00,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:02:00" (3/3) ... [2018-11-07 18:02:00,087 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label39_false-unreach-call_false-termination.c [2018-11-07 18:02:00,098 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:02:00,107 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:02:00,126 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:02:00,165 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:02:00,166 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:02:00,166 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:02:00,166 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:02:00,166 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:02:00,166 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:02:00,167 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:02:00,167 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:02:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 18:02:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-07 18:02:00,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:00,206 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:02:00,209 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:00,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1823937900, now seen corresponding path program 1 times [2018-11-07 18:02:00,218 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:00,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:00,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:00,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:00,280 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:00,639 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 18:02:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:00,744 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:02:00,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:02:00,745 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:00,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:02:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:02:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:02:00,769 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 18:02:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:02,505 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 18:02:02,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:02:02,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2018-11-07 18:02:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:02,537 INFO L225 Difference]: With dead ends: 691 [2018-11-07 18:02:02,538 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 18:02:02,548 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:02:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 18:02:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 18:02:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 18:02:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 18:02:02,637 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 32 [2018-11-07 18:02:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:02,638 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 18:02:02,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:02:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 18:02:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-07 18:02:02,647 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:02,650 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:02:02,650 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:02,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash -319610313, now seen corresponding path program 1 times [2018-11-07 18:02:02,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:02,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:02,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:02,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:02,654 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:03,013 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:02:03,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 18:02:03,013 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:03,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:02:03,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:02:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 18:02:03,016 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 18:02:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:05,103 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 18:02:05,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:02:05,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2018-11-07 18:02:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:05,111 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 18:02:05,112 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 18:02:05,114 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:02:05,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 18:02:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 18:02:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 18:02:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 18:02:05,156 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 119 [2018-11-07 18:02:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:05,157 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 18:02:05,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:02:05,157 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 18:02:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-07 18:02:05,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:05,165 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:02:05,165 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:05,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:05,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1728515332, now seen corresponding path program 1 times [2018-11-07 18:02:05,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:05,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:05,170 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:05,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:05,594 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:05,595 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 129 with the following transitions: [2018-11-07 18:02:05,597 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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] [2018-11-07 18:02:05,652 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:05,652 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:06,281 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:02:06,283 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:02:06,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:06,318 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:02:06,699 INFO L227 lantSequenceWeakener]: Weakened 122 states. On average, predicates are now at 77.72% of their original sizes. [2018-11-07 18:02:06,699 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:02:06,876 INFO L415 sIntCurrentIteration]: We unified 127 AI predicates to 127 [2018-11-07 18:02:06,876 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:02:06,877 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:02:06,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2018-11-07 18:02:06,877 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:06,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:02:06,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:02:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:02:06,879 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 7 states. [2018-11-07 18:02:09,066 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:22,726 INFO L93 Difference]: Finished difference Result 1429 states and 2328 transitions. [2018-11-07 18:02:22,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:02:22,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2018-11-07 18:02:22,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:22,732 INFO L225 Difference]: With dead ends: 1429 [2018-11-07 18:02:22,732 INFO L226 Difference]: Without dead ends: 810 [2018-11-07 18:02:22,735 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:02:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2018-11-07 18:02:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 808. [2018-11-07 18:02:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-11-07 18:02:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1209 transitions. [2018-11-07 18:02:22,764 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1209 transitions. Word has length 128 [2018-11-07 18:02:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:22,764 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 1209 transitions. [2018-11-07 18:02:22,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:02:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1209 transitions. [2018-11-07 18:02:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-11-07 18:02:22,769 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:22,770 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:02:22,770 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:22,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1027226283, now seen corresponding path program 1 times [2018-11-07 18:02:22,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:22,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:22,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:22,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:22,772 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:23,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:23,489 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:23,489 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 214 with the following transitions: [2018-11-07 18:02:23,490 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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] [2018-11-07 18:02:23,496 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:23,496 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:23,696 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:02:23,696 INFO L272 AbstractInterpreter]: Visited 105 different actions 202 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:02:23,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:23,707 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:02:23,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:23,708 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:02:23,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:23,721 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:02:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:23,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:02:24,189 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:02:24,591 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:02:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 82 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:24,994 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:02:25,634 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 18:02:25,771 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:02:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:26,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:02:26,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2018-11-07 18:02:26,195 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:02:26,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 18:02:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 18:02:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:02:26,197 INFO L87 Difference]: Start difference. First operand 808 states and 1209 transitions. Second operand 15 states. [2018-11-07 18:02:27,524 WARN L179 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2018-11-07 18:02:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:32,636 INFO L93 Difference]: Finished difference Result 2262 states and 3569 transitions. [2018-11-07 18:02:32,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-07 18:02:32,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 213 [2018-11-07 18:02:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:32,649 INFO L225 Difference]: With dead ends: 2262 [2018-11-07 18:02:32,649 INFO L226 Difference]: Without dead ends: 1444 [2018-11-07 18:02:32,656 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=313, Invalid=877, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 18:02:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2018-11-07 18:02:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1208. [2018-11-07 18:02:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2018-11-07 18:02:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1607 transitions. [2018-11-07 18:02:32,700 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1607 transitions. Word has length 213 [2018-11-07 18:02:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:32,701 INFO L480 AbstractCegarLoop]: Abstraction has 1208 states and 1607 transitions. [2018-11-07 18:02:32,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 18:02:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1607 transitions. [2018-11-07 18:02:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-11-07 18:02:32,705 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:32,706 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 18:02:32,706 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:32,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash -229492457, now seen corresponding path program 1 times [2018-11-07 18:02:32,707 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:32,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:32,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:32,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:32,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:33,351 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:02:33,564 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:02:33,861 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 18:02:34,233 WARN L179 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-07 18:02:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:02:34,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:34,722 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:34,722 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 240 with the following transitions: [2018-11-07 18:02:34,723 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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] [2018-11-07 18:02:34,728 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:34,728 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:35,051 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:02:35,052 INFO L272 AbstractInterpreter]: Visited 119 different actions 232 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:02:35,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:35,089 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:02:35,527 INFO L227 lantSequenceWeakener]: Weakened 125 states. On average, predicates are now at 78.18% of their original sizes. [2018-11-07 18:02:35,528 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:02:37,083 INFO L415 sIntCurrentIteration]: We unified 238 AI predicates to 238 [2018-11-07 18:02:37,083 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:02:37,084 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:02:37,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 31 [2018-11-07 18:02:37,084 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:37,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:02:37,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:02:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:02:37,086 INFO L87 Difference]: Start difference. First operand 1208 states and 1607 transitions. Second operand 18 states. [2018-11-07 18:02:44,093 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:02:54,938 INFO L93 Difference]: Finished difference Result 2604 states and 3454 transitions. [2018-11-07 18:02:54,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 18:02:54,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 239 [2018-11-07 18:02:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:02:54,947 INFO L225 Difference]: With dead ends: 2604 [2018-11-07 18:02:54,948 INFO L226 Difference]: Without dead ends: 1585 [2018-11-07 18:02:54,952 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 258 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 18:02:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2018-11-07 18:02:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1578. [2018-11-07 18:02:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2018-11-07 18:02:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 1985 transitions. [2018-11-07 18:02:54,995 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 1985 transitions. Word has length 239 [2018-11-07 18:02:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:02:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 1578 states and 1985 transitions. [2018-11-07 18:02:54,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:02:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 1985 transitions. [2018-11-07 18:02:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-07 18:02:55,003 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:02:55,003 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:02:55,003 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:02:55,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash 613999339, now seen corresponding path program 1 times [2018-11-07 18:02:55,004 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:02:55,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:55,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:02:55,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:02:55,005 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:02:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:02:55,333 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 18:02:55,562 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-11-07 18:02:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 183 proven. 125 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:02:55,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:02:55,794 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:02:55,794 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 350 with the following transitions: [2018-11-07 18:02:55,794 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:02:55,798 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:02:55,798 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:02:55,949 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:02:56,057 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:02:56,057 INFO L272 AbstractInterpreter]: Visited 120 different actions 357 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:02:56,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:02:56,066 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:02:56,424 INFO L227 lantSequenceWeakener]: Weakened 346 states. On average, predicates are now at 80.21% of their original sizes. [2018-11-07 18:02:56,425 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:02:56,523 INFO L415 sIntCurrentIteration]: We unified 348 AI predicates to 348 [2018-11-07 18:02:56,523 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:02:56,523 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:02:56,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 16 [2018-11-07 18:02:56,524 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:02:56,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:02:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:02:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:02:56,525 INFO L87 Difference]: Start difference. First operand 1578 states and 1985 transitions. Second operand 10 states. [2018-11-07 18:03:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:01,661 INFO L93 Difference]: Finished difference Result 2991 states and 3930 transitions. [2018-11-07 18:03:01,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:03:01,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 349 [2018-11-07 18:03:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:01,670 INFO L225 Difference]: With dead ends: 2991 [2018-11-07 18:03:01,671 INFO L226 Difference]: Without dead ends: 1974 [2018-11-07 18:03:01,675 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 356 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:03:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2018-11-07 18:03:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1954. [2018-11-07 18:03:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2018-11-07 18:03:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 2418 transitions. [2018-11-07 18:03:01,732 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 2418 transitions. Word has length 349 [2018-11-07 18:03:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:01,733 INFO L480 AbstractCegarLoop]: Abstraction has 1954 states and 2418 transitions. [2018-11-07 18:03:01,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:03:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 2418 transitions. [2018-11-07 18:03:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-11-07 18:03:01,742 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:01,743 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 18:03:01,743 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:01,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1303154289, now seen corresponding path program 1 times [2018-11-07 18:03:01,744 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:01,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:01,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:01,745 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 251 proven. 69 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-11-07 18:03:02,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:02,077 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:02,078 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 420 with the following transitions: [2018-11-07 18:03:02,078 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [494], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:02,081 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:02,082 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:02,233 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:02,498 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:02,498 INFO L272 AbstractInterpreter]: Visited 122 different actions 604 times. Merged at 9 different actions 41 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:02,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:02,504 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:02,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:02,504 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:03:02,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:02,515 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:02,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 477 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2018-11-07 18:03:02,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 251 proven. 69 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2018-11-07 18:03:03,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:03,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-07 18:03:03,040 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:03,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:03:03,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:03:03,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:03:03,042 INFO L87 Difference]: Start difference. First operand 1954 states and 2418 transitions. Second operand 10 states. [2018-11-07 18:03:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:07,513 INFO L93 Difference]: Finished difference Result 6360 states and 9158 transitions. [2018-11-07 18:03:07,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-07 18:03:07,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 419 [2018-11-07 18:03:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:07,538 INFO L225 Difference]: With dead ends: 6360 [2018-11-07 18:03:07,538 INFO L226 Difference]: Without dead ends: 4967 [2018-11-07 18:03:07,551 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 850 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2018-11-07 18:03:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2018-11-07 18:03:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4917. [2018-11-07 18:03:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4917 states. [2018-11-07 18:03:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 6327 transitions. [2018-11-07 18:03:07,687 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 6327 transitions. Word has length 419 [2018-11-07 18:03:07,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:07,688 INFO L480 AbstractCegarLoop]: Abstraction has 4917 states and 6327 transitions. [2018-11-07 18:03:07,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:03:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 6327 transitions. [2018-11-07 18:03:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-11-07 18:03:07,702 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:07,702 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 18:03:07,702 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:07,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2118459876, now seen corresponding path program 1 times [2018-11-07 18:03:07,703 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:07,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:07,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:07,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:07,707 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 401 proven. 173 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-07 18:03:08,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:08,773 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:08,773 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 435 with the following transitions: [2018-11-07 18:03:08,773 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:08,776 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:08,776 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:09,031 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:09,212 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:09,212 INFO L272 AbstractInterpreter]: Visited 122 different actions 606 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:09,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:09,219 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:09,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:09,219 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:03:09,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:09,228 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:09,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 381 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-07 18:03:09,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 381 proven. 2 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-07 18:03:10,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:10,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 14 [2018-11-07 18:03:10,305 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:10,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 18:03:10,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 18:03:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:03:10,306 INFO L87 Difference]: Start difference. First operand 4917 states and 6327 transitions. Second operand 13 states. [2018-11-07 18:03:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:13,533 INFO L93 Difference]: Finished difference Result 9820 states and 13280 transitions. [2018-11-07 18:03:13,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 18:03:13,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 434 [2018-11-07 18:03:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:13,568 INFO L225 Difference]: With dead ends: 9820 [2018-11-07 18:03:13,568 INFO L226 Difference]: Without dead ends: 5263 [2018-11-07 18:03:13,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 873 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2018-11-07 18:03:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2018-11-07 18:03:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5039. [2018-11-07 18:03:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5039 states. [2018-11-07 18:03:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 6270 transitions. [2018-11-07 18:03:13,737 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 6270 transitions. Word has length 434 [2018-11-07 18:03:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:13,738 INFO L480 AbstractCegarLoop]: Abstraction has 5039 states and 6270 transitions. [2018-11-07 18:03:13,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 18:03:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 6270 transitions. [2018-11-07 18:03:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-11-07 18:03:13,745 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:13,746 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:13,746 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:13,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1044484796, now seen corresponding path program 1 times [2018-11-07 18:03:13,747 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:13,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:13,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:13,748 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 427 proven. 184 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-07 18:03:14,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:14,765 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:14,765 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 483 with the following transitions: [2018-11-07 18:03:14,765 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [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], [746], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:14,768 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:14,768 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:14,944 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:15,254 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:15,254 INFO L272 AbstractInterpreter]: Visited 144 different actions 570 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:15,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:15,262 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:15,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:15,262 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:03:15,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:15,270 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:15,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 392 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:03:15,682 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 392 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 18:03:16,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:16,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:03:16,627 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:16,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:03:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:03:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:03:16,628 INFO L87 Difference]: Start difference. First operand 5039 states and 6270 transitions. Second operand 17 states. [2018-11-07 18:03:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:24,584 INFO L93 Difference]: Finished difference Result 9842 states and 13208 transitions. [2018-11-07 18:03:24,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-07 18:03:24,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 482 [2018-11-07 18:03:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:24,607 INFO L225 Difference]: With dead ends: 9842 [2018-11-07 18:03:24,607 INFO L226 Difference]: Without dead ends: 4676 [2018-11-07 18:03:24,639 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 982 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=824, Invalid=3082, Unknown=0, NotChecked=0, Total=3906 [2018-11-07 18:03:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2018-11-07 18:03:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4302. [2018-11-07 18:03:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4302 states. [2018-11-07 18:03:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4302 states to 4302 states and 5078 transitions. [2018-11-07 18:03:24,750 INFO L78 Accepts]: Start accepts. Automaton has 4302 states and 5078 transitions. Word has length 482 [2018-11-07 18:03:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:24,751 INFO L480 AbstractCegarLoop]: Abstraction has 4302 states and 5078 transitions. [2018-11-07 18:03:24,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:03:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4302 states and 5078 transitions. [2018-11-07 18:03:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2018-11-07 18:03:24,760 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:24,761 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:24,761 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:24,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1809364163, now seen corresponding path program 1 times [2018-11-07 18:03:24,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:24,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:24,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:24,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:24,763 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 476 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 18:03:25,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:25,344 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:25,345 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 632 with the following transitions: [2018-11-07 18:03:25,345 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [562], [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], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:25,348 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:25,348 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:25,579 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:26,495 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:03:26,496 INFO L272 AbstractInterpreter]: Visited 190 different actions 952 times. Merged at 9 different actions 46 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:26,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:26,502 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:03:27,077 INFO L227 lantSequenceWeakener]: Weakened 628 states. On average, predicates are now at 80.15% of their original sizes. [2018-11-07 18:03:27,078 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:03:27,165 INFO L415 sIntCurrentIteration]: We unified 630 AI predicates to 630 [2018-11-07 18:03:27,165 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:03:27,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:03:27,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 18:03:27,166 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:03:27,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:03:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:03:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:03:27,167 INFO L87 Difference]: Start difference. First operand 4302 states and 5078 transitions. Second operand 10 states. [2018-11-07 18:03:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:32,642 INFO L93 Difference]: Finished difference Result 9686 states and 11655 transitions. [2018-11-07 18:03:32,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:03:32,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 631 [2018-11-07 18:03:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:32,667 INFO L225 Difference]: With dead ends: 9686 [2018-11-07 18:03:32,667 INFO L226 Difference]: Without dead ends: 5945 [2018-11-07 18:03:32,682 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 638 GetRequests, 622 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:03:32,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5945 states. [2018-11-07 18:03:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5945 to 5870. [2018-11-07 18:03:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5870 states. [2018-11-07 18:03:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 6699 transitions. [2018-11-07 18:03:32,806 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 6699 transitions. Word has length 631 [2018-11-07 18:03:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:32,807 INFO L480 AbstractCegarLoop]: Abstraction has 5870 states and 6699 transitions. [2018-11-07 18:03:32,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:03:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 6699 transitions. [2018-11-07 18:03:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-11-07 18:03:32,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:32,818 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:32,819 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:32,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2040431120, now seen corresponding path program 1 times [2018-11-07 18:03:32,819 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:32,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:32,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:32,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:32,821 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 476 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-07 18:03:34,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:34,017 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:34,017 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 641 with the following transitions: [2018-11-07 18:03:34,017 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [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], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:03:34,020 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:34,020 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:34,265 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:34,892 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:34,893 INFO L272 AbstractInterpreter]: Visited 191 different actions 953 times. Merged at 9 different actions 46 times. Widened at 1 different actions 1 times. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:34,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:34,902 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:34,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:34,902 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:03:34,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:34,911 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:35,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 819 proven. 2 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-11-07 18:03:35,532 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:35,736 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-07 18:03:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 476 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-07 18:03:36,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:36,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:03:36,969 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:36,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:03:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:03:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:03:36,970 INFO L87 Difference]: Start difference. First operand 5870 states and 6699 transitions. Second operand 7 states. [2018-11-07 18:03:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:39,892 INFO L93 Difference]: Finished difference Result 19068 states and 25169 transitions. [2018-11-07 18:03:39,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:03:39,892 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 640 [2018-11-07 18:03:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:39,980 INFO L225 Difference]: With dead ends: 19068 [2018-11-07 18:03:39,981 INFO L226 Difference]: Without dead ends: 13759 [2018-11-07 18:03:40,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1295 GetRequests, 1282 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:03:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13759 states. [2018-11-07 18:03:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13759 to 13189. [2018-11-07 18:03:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13189 states. [2018-11-07 18:03:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13189 states to 13189 states and 15101 transitions. [2018-11-07 18:03:40,426 INFO L78 Accepts]: Start accepts. Automaton has 13189 states and 15101 transitions. Word has length 640 [2018-11-07 18:03:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:40,428 INFO L480 AbstractCegarLoop]: Abstraction has 13189 states and 15101 transitions. [2018-11-07 18:03:40,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:03:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 13189 states and 15101 transitions. [2018-11-07 18:03:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2018-11-07 18:03:40,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:40,443 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-11-07 18:03:40,443 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:40,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash -566444201, now seen corresponding path program 1 times [2018-11-07 18:03:40,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:40,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:40,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:40,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:40,445 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 483 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-07 18:03:41,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:41,038 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:41,038 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 648 with the following transitions: [2018-11-07 18:03:41,039 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [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] [2018-11-07 18:03:41,049 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:41,050 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:41,261 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:41,913 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:41,913 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:41,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:41,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:41,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:41,923 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:03:41,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:41,933 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:42,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 826 proven. 2 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-11-07 18:03:42,606 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 483 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-07 18:03:43,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:43,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:03:43,077 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:43,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:03:43,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:03:43,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:03:43,079 INFO L87 Difference]: Start difference. First operand 13189 states and 15101 transitions. Second operand 7 states. [2018-11-07 18:03:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:45,681 INFO L93 Difference]: Finished difference Result 32881 states and 43872 transitions. [2018-11-07 18:03:45,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:03:45,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 647 [2018-11-07 18:03:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:45,847 INFO L225 Difference]: With dead ends: 32881 [2018-11-07 18:03:45,847 INFO L226 Difference]: Without dead ends: 20253 [2018-11-07 18:03:45,987 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1309 GetRequests, 1296 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:03:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20253 states. [2018-11-07 18:03:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20253 to 19386. [2018-11-07 18:03:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19386 states. [2018-11-07 18:03:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19386 states to 19386 states and 22576 transitions. [2018-11-07 18:03:46,666 INFO L78 Accepts]: Start accepts. Automaton has 19386 states and 22576 transitions. Word has length 647 [2018-11-07 18:03:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:46,668 INFO L480 AbstractCegarLoop]: Abstraction has 19386 states and 22576 transitions. [2018-11-07 18:03:46,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:03:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 19386 states and 22576 transitions. [2018-11-07 18:03:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-11-07 18:03:46,687 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:46,688 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:46,688 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:46,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -872345528, now seen corresponding path program 1 times [2018-11-07 18:03:46,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:46,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:46,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:46,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:46,690 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 482 proven. 540 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2018-11-07 18:03:48,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:48,889 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:03:48,889 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 693 with the following transitions: [2018-11-07 18:03:48,890 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [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], [866], [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] [2018-11-07 18:03:48,893 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:03:48,893 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:03:49,048 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:03:49,676 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:03:49,676 INFO L272 AbstractInterpreter]: Visited 192 different actions 964 times. Merged at 10 different actions 52 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:03:49,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:49,690 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:03:49,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:03:49,690 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:03:49,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:49,700 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:03:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:03:49,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:03:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 871 proven. 2 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2018-11-07 18:03:50,733 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:03:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 528 proven. 95 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2018-11-07 18:03:51,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:03:51,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 18:03:51,356 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:03:51,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:03:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:03:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:03:51,358 INFO L87 Difference]: Start difference. First operand 19386 states and 22576 transitions. Second operand 17 states. [2018-11-07 18:03:52,134 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 25 [2018-11-07 18:03:55,144 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 18:03:56,515 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 18:03:56,810 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-11-07 18:03:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:03:58,655 INFO L93 Difference]: Finished difference Result 47858 states and 57673 transitions. [2018-11-07 18:03:58,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 18:03:58,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 692 [2018-11-07 18:03:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:03:58,772 INFO L225 Difference]: With dead ends: 47858 [2018-11-07 18:03:58,772 INFO L226 Difference]: Without dead ends: 28665 [2018-11-07 18:03:58,880 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1456 GetRequests, 1406 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 18:03:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28665 states. [2018-11-07 18:03:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28665 to 28386. [2018-11-07 18:03:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28386 states. [2018-11-07 18:03:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28386 states to 28386 states and 33157 transitions. [2018-11-07 18:03:59,738 INFO L78 Accepts]: Start accepts. Automaton has 28386 states and 33157 transitions. Word has length 692 [2018-11-07 18:03:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:03:59,739 INFO L480 AbstractCegarLoop]: Abstraction has 28386 states and 33157 transitions. [2018-11-07 18:03:59,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:03:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 28386 states and 33157 transitions. [2018-11-07 18:03:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-11-07 18:03:59,754 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:03:59,755 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:03:59,755 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:03:59,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:03:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1662592103, now seen corresponding path program 1 times [2018-11-07 18:03:59,756 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:03:59,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:59,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:03:59,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:03:59,757 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:03:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:00,617 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2018-11-07 18:04:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 713 proven. 366 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-11-07 18:04:01,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:01,989 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:01,989 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 808 with the following transitions: [2018-11-07 18:04:01,989 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [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], [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] [2018-11-07 18:04:01,992 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:01,992 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:02,131 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:03,128 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:03,128 INFO L272 AbstractInterpreter]: Visited 193 different actions 1170 times. Merged at 11 different actions 72 times. Widened at 1 different actions 2 times. Found 20 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:04:03,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:03,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:03,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:03,139 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:04:03,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:03,148 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:03,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 1110 proven. 2 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2018-11-07 18:04:03,672 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 676 proven. 95 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2018-11-07 18:04:04,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:04,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:04:04,227 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:04,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:04:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:04:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:04:04,229 INFO L87 Difference]: Start difference. First operand 28386 states and 33157 transitions. Second operand 17 states. [2018-11-07 18:04:05,360 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2018-11-07 18:04:05,718 WARN L179 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-11-07 18:04:06,320 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2018-11-07 18:04:06,490 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2018-11-07 18:04:07,301 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2018-11-07 18:04:11,183 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2018-11-07 18:04:11,343 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2018-11-07 18:04:11,837 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2018-11-07 18:04:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:15,657 INFO L93 Difference]: Finished difference Result 56792 states and 72862 transitions. [2018-11-07 18:04:15,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-07 18:04:15,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 807 [2018-11-07 18:04:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:15,901 INFO L225 Difference]: With dead ends: 56792 [2018-11-07 18:04:15,901 INFO L226 Difference]: Without dead ends: 28780 [2018-11-07 18:04:16,079 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1726 GetRequests, 1653 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1041, Invalid=4215, Unknown=0, NotChecked=0, Total=5256 [2018-11-07 18:04:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28780 states. [2018-11-07 18:04:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28780 to 26752. [2018-11-07 18:04:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26752 states. [2018-11-07 18:04:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26752 states to 26752 states and 29192 transitions. [2018-11-07 18:04:16,863 INFO L78 Accepts]: Start accepts. Automaton has 26752 states and 29192 transitions. Word has length 807 [2018-11-07 18:04:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:16,864 INFO L480 AbstractCegarLoop]: Abstraction has 26752 states and 29192 transitions. [2018-11-07 18:04:16,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:04:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26752 states and 29192 transitions. [2018-11-07 18:04:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2018-11-07 18:04:16,881 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:16,881 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:16,882 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:16,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2109321624, now seen corresponding path program 1 times [2018-11-07 18:04:16,882 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:16,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:16,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:16,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:16,883 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:17,732 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:04:17,921 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:04:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 562 proven. 1124 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2018-11-07 18:04:20,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:20,107 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:20,107 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 909 with the following transitions: [2018-11-07 18:04:20,107 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [622], [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], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:20,110 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:20,110 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:20,279 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:20,986 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:20,986 INFO L272 AbstractInterpreter]: Visited 194 different actions 984 times. Merged at 11 different actions 62 times. Widened at 1 different actions 1 times. Found 19 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:04:20,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:20,992 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:20,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:20,992 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:04:21,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:21,002 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:21,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 1673 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2018-11-07 18:04:21,855 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2334 backedges. 563 proven. 350 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2018-11-07 18:04:22,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:22,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:04:22,784 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:22,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:04:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:04:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:04:22,785 INFO L87 Difference]: Start difference. First operand 26752 states and 29192 transitions. Second operand 18 states. [2018-11-07 18:04:26,684 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2018-11-07 18:04:26,892 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2018-11-07 18:04:31,486 WARN L179 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-11-07 18:04:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:31,956 INFO L93 Difference]: Finished difference Result 52263 states and 57123 transitions. [2018-11-07 18:04:31,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-07 18:04:31,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 908 [2018-11-07 18:04:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:32,012 INFO L225 Difference]: With dead ends: 52263 [2018-11-07 18:04:32,012 INFO L226 Difference]: Without dead ends: 25885 [2018-11-07 18:04:32,075 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1906 GetRequests, 1843 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=850, Invalid=3310, Unknown=0, NotChecked=0, Total=4160 [2018-11-07 18:04:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25885 states. [2018-11-07 18:04:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25885 to 25353. [2018-11-07 18:04:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25353 states. [2018-11-07 18:04:32,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25353 states to 25353 states and 27037 transitions. [2018-11-07 18:04:32,508 INFO L78 Accepts]: Start accepts. Automaton has 25353 states and 27037 transitions. Word has length 908 [2018-11-07 18:04:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:32,509 INFO L480 AbstractCegarLoop]: Abstraction has 25353 states and 27037 transitions. [2018-11-07 18:04:32,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:04:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 25353 states and 27037 transitions. [2018-11-07 18:04:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 954 [2018-11-07 18:04:32,522 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:32,523 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 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, 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, 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] [2018-11-07 18:04:32,523 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:32,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash 701722439, now seen corresponding path program 1 times [2018-11-07 18:04:32,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:32,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:32,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:32,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:32,525 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1312 proven. 97 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-11-07 18:04:33,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:33,619 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:33,619 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 954 with the following transitions: [2018-11-07 18:04:33,620 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [622], [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], [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] [2018-11-07 18:04:33,622 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:33,622 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:33,785 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:34,572 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:34,572 INFO L272 AbstractInterpreter]: Visited 194 different actions 1180 times. Merged at 11 different actions 75 times. Widened at 1 different actions 2 times. Found 25 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:04:34,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:34,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:34,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:34,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:04:34,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:34,597 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:34,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1312 proven. 6 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2018-11-07 18:04:35,527 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2424 backedges. 1312 proven. 101 refuted. 0 times theorem prover too weak. 1011 trivial. 0 not checked. [2018-11-07 18:04:36,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:36,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2018-11-07 18:04:36,380 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:36,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:04:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:04:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:04:36,382 INFO L87 Difference]: Start difference. First operand 25353 states and 27037 transitions. Second operand 9 states. [2018-11-07 18:04:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:40,771 INFO L93 Difference]: Finished difference Result 56007 states and 60244 transitions. [2018-11-07 18:04:40,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-07 18:04:40,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 953 [2018-11-07 18:04:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:40,833 INFO L225 Difference]: With dead ends: 56007 [2018-11-07 18:04:40,833 INFO L226 Difference]: Without dead ends: 31028 [2018-11-07 18:04:40,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1936 GetRequests, 1910 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2018-11-07 18:04:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31028 states. [2018-11-07 18:04:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31028 to 29896. [2018-11-07 18:04:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29896 states. [2018-11-07 18:04:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29896 states to 29896 states and 31919 transitions. [2018-11-07 18:04:41,361 INFO L78 Accepts]: Start accepts. Automaton has 29896 states and 31919 transitions. Word has length 953 [2018-11-07 18:04:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:41,362 INFO L480 AbstractCegarLoop]: Abstraction has 29896 states and 31919 transitions. [2018-11-07 18:04:41,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:04:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 29896 states and 31919 transitions. [2018-11-07 18:04:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1511 [2018-11-07 18:04:41,386 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:41,387 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:41,387 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:41,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:41,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2080723076, now seen corresponding path program 1 times [2018-11-07 18:04:41,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:41,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:41,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:41,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:41,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 823 proven. 2698 refuted. 0 times theorem prover too weak. 2967 trivial. 0 not checked. [2018-11-07 18:04:46,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:46,400 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:46,400 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1511 with the following transitions: [2018-11-07 18:04:46,401 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [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], [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] [2018-11-07 18:04:46,403 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:46,403 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:46,574 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:47,655 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:04:47,655 INFO L272 AbstractInterpreter]: Visited 201 different actions 1229 times. Merged at 13 different actions 82 times. Widened at 1 different actions 2 times. Found 37 fixpoints after 7 different actions. Largest state had 24 variables. [2018-11-07 18:04:47,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:47,753 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:04:47,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:47,753 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:04:47,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:47,762 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:04:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:48,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:04:51,162 WARN L179 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 3060 DAG size of output: 57 [2018-11-07 18:04:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 3912 proven. 40 refuted. 0 times theorem prover too weak. 2536 trivial. 0 not checked. [2018-11-07 18:04:53,136 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:04:53,450 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2018-11-07 18:04:53,592 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 18:04:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 768 proven. 890 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-11-07 18:04:56,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:04:56,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 6] total 32 [2018-11-07 18:04:56,543 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:04:56,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-07 18:04:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-07 18:04:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2018-11-07 18:04:56,545 INFO L87 Difference]: Start difference. First operand 29896 states and 31919 transitions. Second operand 30 states. [2018-11-07 18:04:57,632 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2018-11-07 18:04:59,742 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2018-11-07 18:04:59,931 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2018-11-07 18:05:00,788 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2018-11-07 18:05:01,068 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 44 [2018-11-07 18:05:01,729 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 19 [2018-11-07 18:05:02,660 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 25 [2018-11-07 18:05:03,893 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2018-11-07 18:05:04,436 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2018-11-07 18:05:04,659 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2018-11-07 18:05:05,783 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2018-11-07 18:05:06,489 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2018-11-07 18:05:09,979 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-07 18:05:10,182 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2018-11-07 18:05:10,761 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2018-11-07 18:05:13,010 WARN L179 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2018-11-07 18:05:14,613 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2018-11-07 18:05:15,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:15,359 INFO L93 Difference]: Finished difference Result 60358 states and 64683 transitions. [2018-11-07 18:05:15,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-07 18:05:15,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1510 [2018-11-07 18:05:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:15,418 INFO L225 Difference]: With dead ends: 60358 [2018-11-07 18:05:15,419 INFO L226 Difference]: Without dead ends: 30275 [2018-11-07 18:05:15,459 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3126 GetRequests, 3039 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1289, Invalid=5683, Unknown=0, NotChecked=0, Total=6972 [2018-11-07 18:05:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30275 states. [2018-11-07 18:05:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30275 to 29672. [2018-11-07 18:05:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29672 states. [2018-11-07 18:05:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29672 states to 29672 states and 31544 transitions. [2018-11-07 18:05:15,876 INFO L78 Accepts]: Start accepts. Automaton has 29672 states and 31544 transitions. Word has length 1510 [2018-11-07 18:05:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:15,877 INFO L480 AbstractCegarLoop]: Abstraction has 29672 states and 31544 transitions. [2018-11-07 18:05:15,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-07 18:05:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 29672 states and 31544 transitions. [2018-11-07 18:05:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1522 [2018-11-07 18:05:15,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:15,900 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:15,900 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:15,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1963406811, now seen corresponding path program 1 times [2018-11-07 18:05:15,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:15,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:15,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:15,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:15,902 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:17,016 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-07 18:05:17,208 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:17,417 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:17,635 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6521 backedges. 722 proven. 2823 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2018-11-07 18:05:21,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:21,052 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:21,052 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1522 with the following transitions: [2018-11-07 18:05:21,052 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [157], [159], [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], [622], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [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], [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], [926], [927], [931], [934], [935], [939], [943], [946], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:21,055 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:21,055 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:21,191 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:22,148 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:05:22,148 INFO L272 AbstractInterpreter]: Visited 201 different actions 1225 times. Merged at 13 different actions 79 times. Widened at 1 different actions 2 times. Found 32 fixpoints after 7 different actions. Largest state had 24 variables. [2018-11-07 18:05:22,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:22,183 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:05:22,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:22,183 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-11-07 18:05:22,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:22,201 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:05:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:22,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:05:22,993 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2018-11-07 18:05:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6521 backedges. 3765 proven. 2 refuted. 0 times theorem prover too weak. 2754 trivial. 0 not checked. [2018-11-07 18:05:24,818 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:05:25,986 WARN L179 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 10 Received shutdown request... [2018-11-07 18:05:26,732 WARN L187 SmtUtils]: Removed 4 from assertion stack [2018-11-07 18:05:26,733 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 18:05:26,934 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:05:26,934 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:05:26,939 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:05:26,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:05:26 BoogieIcfgContainer [2018-11-07 18:05:26,939 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:05:26,940 INFO L168 Benchmark]: Toolchain (without parser) took 211598.44 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.5 GB). Free memory was 1.4 GB in the beginning and 3.0 GB in the end (delta: -1.6 GB). Peak memory consumption was 910.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:26,941 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:05:26,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 822.05 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. [2018-11-07 18:05:26,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 163.81 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -851.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:26,943 INFO L168 Benchmark]: Boogie Preprocessor took 137.40 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: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:26,944 INFO L168 Benchmark]: RCFGBuilder took 3608.65 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: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:26,945 INFO L168 Benchmark]: TraceAbstraction took 206859.73 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -953.3 MB). Peak memory consumption was 838.8 MB. Max. memory is 7.1 GB. [2018-11-07 18:05:26,951 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 822.05 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 163.81 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -851.9 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.40 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: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 3608.65 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: 118.2 MB). Peak memory consumption was 118.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206859.73 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 3.0 GB in the end (delta: -953.3 MB). Peak memory consumption was 838.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 79). Cancelled while BasicCegarLoop was analyzing trace of length 1522 with TraceHistMax 12,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 28. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 206.7s OverallTime, 18 OverallIterations, 12 TraceHistogramMax, 128.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2023 SDtfs, 46783 SDslu, 4985 SDs, 0 SdLazy, 52472 SolverSat, 8449 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 59.6s Time, PredicateUnifierStatistics: 8 DeclaredPredicates, 17421 GetRequests, 16862 SyntacticMatches, 23 SemanticMatches, 536 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7591 ImplicationChecksByTransitivity, 33.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29896occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.1s AbstIntTime, 16 AbstIntIterations, 4 AbstIntStrong, 0.9971535817904232 AbsIntWeakeningRatio, 0.09084139985107967 AbsIntAvgWeakeningVarsNumRemoved, 20.206254653760237 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.8s AutomataMinimizationTime, 17 MinimizatonAttempts, 7008 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 33.4s InterpolantComputationTime, 16908 NumberOfCodeBlocks, 16908 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 24574 ConstructedInterpolants, 7 QuantifiedInterpolants, 85601706 SizeOfPredicates, 39 NumberOfNonLiveVariables, 11150 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 39 InterpolantComputations, 2 PerfectInterpolantSequences, 50268/57938 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown