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/Problem17_label41_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 21:05:05,422 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 21:05:05,424 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 21:05:05,442 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 21:05:05,442 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 21:05:05,444 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 21:05:05,447 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 21:05:05,450 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 21:05:05,452 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 21:05:05,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 21:05:05,460 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 21:05:05,461 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 21:05:05,464 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 21:05:05,467 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 21:05:05,468 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 21:05:05,471 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 21:05:05,473 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 21:05:05,476 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 21:05:05,478 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 21:05:05,482 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 21:05:05,483 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 21:05:05,485 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 21:05:05,487 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 21:05:05,487 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 21:05:05,487 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 21:05:05,488 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 21:05:05,489 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 21:05:05,490 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 21:05:05,491 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 21:05:05,492 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 21:05:05,492 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 21:05:05,493 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 21:05:05,493 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 21:05:05,493 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 21:05:05,495 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 21:05:05,496 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 21:05:05,496 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 21:05:05,523 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 21:05:05,523 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 21:05:05,527 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 21:05:05,528 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 21:05:05,528 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 21:05:05,528 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 21:05:05,528 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 21:05:05,529 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 21:05:05,531 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 21:05:05,531 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 21:05:05,531 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 21:05:05,531 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 21:05:05,531 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 21:05:05,531 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 21:05:05,533 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 21:05:05,534 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 21:05:05,534 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 21:05:05,534 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 21:05:05,534 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 21:05:05,534 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 21:05:05,535 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 21:05:05,535 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 21:05:05,535 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 21:05:05,535 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 21:05:05,536 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 21:05:05,536 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 21:05:05,536 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 21:05:05,536 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 21:05:05,536 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 21:05:05,537 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 21:05:05,599 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 21:05:05,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 21:05:05,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 21:05:05,620 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 21:05:05,620 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 21:05:05,621 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label41_true-unreach-call.c [2018-11-07 21:05:05,687 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad35656a/d22feff0ac734a8086ee36bbe2aa4f8e/FLAG9263a05a3 [2018-11-07 21:05:06,447 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 21:05:06,450 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label41_true-unreach-call.c [2018-11-07 21:05:06,478 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad35656a/d22feff0ac734a8086ee36bbe2aa4f8e/FLAG9263a05a3 [2018-11-07 21:05:06,498 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad35656a/d22feff0ac734a8086ee36bbe2aa4f8e [2018-11-07 21:05:06,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 21:05:06,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 21:05:06,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 21:05:06,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 21:05:06,517 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 21:05:06,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:05:06" (1/1) ... [2018-11-07 21:05:06,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cedeeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:06, skipping insertion in model container [2018-11-07 21:05:06,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 09:05:06" (1/1) ... [2018-11-07 21:05:06,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 21:05:06,666 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 21:05:07,729 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:05:07,738 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 21:05:08,145 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 21:05:08,168 INFO L193 MainTranslator]: Completed translation [2018-11-07 21:05:08,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08 WrapperNode [2018-11-07 21:05:08,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 21:05:08,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 21:05:08,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 21:05:08,171 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 21:05:08,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 21:05:08,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 21:05:08,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 21:05:08,431 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 21:05:08,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (1/1) ... [2018-11-07 21:05:08,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 21:05:08,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 21:05:08,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 21:05:08,621 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 21:05:08,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (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 21:05:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 21:05:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 21:05:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 21:05:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 21:05:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 21:05:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 21:05:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 21:05:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 21:05:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 21:05:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 21:05:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 21:05:17,159 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 21:05:17,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:05:17 BoogieIcfgContainer [2018-11-07 21:05:17,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 21:05:17,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 21:05:17,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 21:05:17,165 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 21:05:17,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 09:05:06" (1/3) ... [2018-11-07 21:05:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54529a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:05:17, skipping insertion in model container [2018-11-07 21:05:17,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 09:05:08" (2/3) ... [2018-11-07 21:05:17,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54529a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 09:05:17, skipping insertion in model container [2018-11-07 21:05:17,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 09:05:17" (3/3) ... [2018-11-07 21:05:17,168 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label41_true-unreach-call.c [2018-11-07 21:05:17,179 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 21:05:17,189 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 21:05:17,206 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 21:05:17,248 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 21:05:17,248 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 21:05:17,248 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 21:05:17,248 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 21:05:17,249 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 21:05:17,249 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 21:05:17,249 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 21:05:17,249 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 21:05:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-07 21:05:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-07 21:05:17,295 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:17,296 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:05:17,298 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:17,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash -131983554, now seen corresponding path program 1 times [2018-11-07 21:05:17,307 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:17,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:17,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:17,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:17,353 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:17,788 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 21:05:17,790 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:05:17,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:05:17,790 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:17,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:05:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:05:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:05:17,815 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-07 21:05:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:05:25,754 INFO L93 Difference]: Finished difference Result 2166 states and 4013 transitions. [2018-11-07 21:05:25,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:05:25,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2018-11-07 21:05:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:05:25,801 INFO L225 Difference]: With dead ends: 2166 [2018-11-07 21:05:25,803 INFO L226 Difference]: Without dead ends: 1556 [2018-11-07 21:05:25,813 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:05:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2018-11-07 21:05:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1068. [2018-11-07 21:05:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2018-11-07 21:05:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1850 transitions. [2018-11-07 21:05:25,968 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1850 transitions. Word has length 41 [2018-11-07 21:05:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:05:25,969 INFO L480 AbstractCegarLoop]: Abstraction has 1068 states and 1850 transitions. [2018-11-07 21:05:25,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:05:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1850 transitions. [2018-11-07 21:05:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-07 21:05:25,976 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:25,976 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:25,976 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:25,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:25,977 INFO L82 PathProgramCache]: Analyzing trace with hash 183924887, now seen corresponding path program 1 times [2018-11-07 21:05:25,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:25,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:25,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:25,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:25,979 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:26,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:05:26,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:05:26,302 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:26,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:05:26,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:05:26,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:05:26,304 INFO L87 Difference]: Start difference. First operand 1068 states and 1850 transitions. Second operand 6 states. [2018-11-07 21:05:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:05:33,236 INFO L93 Difference]: Finished difference Result 3059 states and 5419 transitions. [2018-11-07 21:05:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:05:33,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2018-11-07 21:05:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:05:33,252 INFO L225 Difference]: With dead ends: 3059 [2018-11-07 21:05:33,253 INFO L226 Difference]: Without dead ends: 1997 [2018-11-07 21:05:33,258 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:05:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2018-11-07 21:05:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1975. [2018-11-07 21:05:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2018-11-07 21:05:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3181 transitions. [2018-11-07 21:05:33,334 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3181 transitions. Word has length 117 [2018-11-07 21:05:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:05:33,334 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 3181 transitions. [2018-11-07 21:05:33,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:05:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3181 transitions. [2018-11-07 21:05:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-11-07 21:05:33,340 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:33,340 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:33,341 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:33,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1074284513, now seen corresponding path program 1 times [2018-11-07 21:05:33,341 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:33,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:33,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:33,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:33,343 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:33,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:05:33,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 21:05:33,750 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:33,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 21:05:33,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 21:05:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 21:05:33,753 INFO L87 Difference]: Start difference. First operand 1975 states and 3181 transitions. Second operand 6 states. [2018-11-07 21:05:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:05:37,893 INFO L93 Difference]: Finished difference Result 4880 states and 7834 transitions. [2018-11-07 21:05:37,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 21:05:37,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2018-11-07 21:05:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:05:37,911 INFO L225 Difference]: With dead ends: 4880 [2018-11-07 21:05:37,912 INFO L226 Difference]: Without dead ends: 2911 [2018-11-07 21:05:37,920 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:05:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2018-11-07 21:05:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2880. [2018-11-07 21:05:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 21:05:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3936 transitions. [2018-11-07 21:05:38,005 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3936 transitions. Word has length 121 [2018-11-07 21:05:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:05:38,005 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3936 transitions. [2018-11-07 21:05:38,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 21:05:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3936 transitions. [2018-11-07 21:05:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-07 21:05:38,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:38,011 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:38,011 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:38,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1495659742, now seen corresponding path program 1 times [2018-11-07 21:05:38,013 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:38,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:38,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:38,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:38,015 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 21:05:38,232 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:05:38,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:05:38,233 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:38,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:05:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:05:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:05:38,234 INFO L87 Difference]: Start difference. First operand 2880 states and 3936 transitions. Second operand 4 states. [2018-11-07 21:05:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:05:42,778 INFO L93 Difference]: Finished difference Result 5754 states and 7882 transitions. [2018-11-07 21:05:42,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:05:42,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2018-11-07 21:05:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:05:42,800 INFO L225 Difference]: With dead ends: 5754 [2018-11-07 21:05:42,801 INFO L226 Difference]: Without dead ends: 2880 [2018-11-07 21:05:42,812 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:05:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2018-11-07 21:05:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2880. [2018-11-07 21:05:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2880 states. [2018-11-07 21:05:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3720 transitions. [2018-11-07 21:05:42,888 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3720 transitions. Word has length 151 [2018-11-07 21:05:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:05:42,889 INFO L480 AbstractCegarLoop]: Abstraction has 2880 states and 3720 transitions. [2018-11-07 21:05:42,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:05:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3720 transitions. [2018-11-07 21:05:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-11-07 21:05:42,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:42,892 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:05:42,893 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:42,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash 204309128, now seen corresponding path program 1 times [2018-11-07 21:05:42,893 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:42,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:42,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:42,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:42,895 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-11-07 21:05:43,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:05:43,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 21:05:43,133 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:43,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 21:05:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 21:05:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 21:05:43,134 INFO L87 Difference]: Start difference. First operand 2880 states and 3720 transitions. Second operand 3 states. [2018-11-07 21:05:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:05:46,414 INFO L93 Difference]: Finished difference Result 8399 states and 11033 transitions. [2018-11-07 21:05:46,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 21:05:46,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2018-11-07 21:05:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:05:46,439 INFO L225 Difference]: With dead ends: 8399 [2018-11-07 21:05:46,439 INFO L226 Difference]: Without dead ends: 5525 [2018-11-07 21:05:46,449 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 21:05:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2018-11-07 21:05:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5525. [2018-11-07 21:05:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5525 states. [2018-11-07 21:05:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 6667 transitions. [2018-11-07 21:05:46,567 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 6667 transitions. Word has length 205 [2018-11-07 21:05:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:05:46,568 INFO L480 AbstractCegarLoop]: Abstraction has 5525 states and 6667 transitions. [2018-11-07 21:05:46,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 21:05:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 6667 transitions. [2018-11-07 21:05:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-11-07 21:05:46,573 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:05:46,573 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:05:46,573 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:05:46,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash -648899639, now seen corresponding path program 1 times [2018-11-07 21:05:46,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:05:46,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:46,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:05:46,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:05:46,575 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:05:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:05:47,279 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-07 21:05:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 68 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:05:47,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:05:47,402 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:05:47,403 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 229 with the following transitions: [2018-11-07 21:05:47,405 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1231], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:05:47,463 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:05:47,463 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:05:48,101 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:05:48,111 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 21:05:48,113 INFO L272 AbstractInterpreter]: Visited 115 different actions 115 times. Never merged. Never widened. Never found a fixpoint. Largest state had 26 variables. [2018-11-07 21:05:48,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:05:48,157 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 21:05:48,665 INFO L227 lantSequenceWeakener]: Weakened 219 states. On average, predicates are now at 75.36% of their original sizes. [2018-11-07 21:05:48,666 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 21:05:49,160 INFO L415 sIntCurrentIteration]: We unified 227 AI predicates to 227 [2018-11-07 21:05:49,160 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 21:05:49,161 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 21:05:49,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2018-11-07 21:05:49,162 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:05:49,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 21:05:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 21:05:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 21:05:49,166 INFO L87 Difference]: Start difference. First operand 5525 states and 6667 transitions. Second operand 8 states. [2018-11-07 21:06:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:06:23,430 INFO L93 Difference]: Finished difference Result 11480 states and 13794 transitions. [2018-11-07 21:06:23,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 21:06:23,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2018-11-07 21:06:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:06:23,453 INFO L225 Difference]: With dead ends: 11480 [2018-11-07 21:06:23,453 INFO L226 Difference]: Without dead ends: 5961 [2018-11-07 21:06:23,465 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 229 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-11-07 21:06:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2018-11-07 21:06:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 5959. [2018-11-07 21:06:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5959 states. [2018-11-07 21:06:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5959 states to 5959 states and 7112 transitions. [2018-11-07 21:06:23,577 INFO L78 Accepts]: Start accepts. Automaton has 5959 states and 7112 transitions. Word has length 228 [2018-11-07 21:06:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:06:23,577 INFO L480 AbstractCegarLoop]: Abstraction has 5959 states and 7112 transitions. [2018-11-07 21:06:23,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 21:06:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 5959 states and 7112 transitions. [2018-11-07 21:06:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-11-07 21:06:23,583 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:06:23,584 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-07 21:06:23,584 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:06:23,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:06:23,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2086311615, now seen corresponding path program 1 times [2018-11-07 21:06:23,585 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:06:23,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:23,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:06:23,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:23,586 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:06:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:06:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 21:06:23,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:06:23,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:06:23,984 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:06:23,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:06:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:06:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:06:23,986 INFO L87 Difference]: Start difference. First operand 5959 states and 7112 transitions. Second operand 4 states. [2018-11-07 21:06:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:06:30,705 INFO L93 Difference]: Finished difference Result 15050 states and 18465 transitions. [2018-11-07 21:06:30,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:06:30,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-11-07 21:06:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:06:30,747 INFO L225 Difference]: With dead ends: 15050 [2018-11-07 21:06:30,747 INFO L226 Difference]: Without dead ends: 9531 [2018-11-07 21:06:31,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:06:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2018-11-07 21:06:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 9514. [2018-11-07 21:06:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9514 states. [2018-11-07 21:06:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 11256 transitions. [2018-11-07 21:06:31,643 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 11256 transitions. Word has length 271 [2018-11-07 21:06:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:06:31,644 INFO L480 AbstractCegarLoop]: Abstraction has 9514 states and 11256 transitions. [2018-11-07 21:06:31,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:06:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 11256 transitions. [2018-11-07 21:06:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-11-07 21:06:31,652 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:06:31,652 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:06:31,652 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:06:31,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:06:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1060709599, now seen corresponding path program 1 times [2018-11-07 21:06:31,653 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:06:31,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:31,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:06:31,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:31,654 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:06:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:06:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 112 proven. 142 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2018-11-07 21:06:32,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:06:32,384 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:06:32,384 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 281 with the following transitions: [2018-11-07 21:06:32,384 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:06:32,389 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:06:32,389 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:06:32,459 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:06:33,100 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:06:33,100 INFO L272 AbstractInterpreter]: Visited 98 different actions 483 times. Merged at 8 different actions 38 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 21:06:33,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:06:33,139 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:06:33,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:06:33,139 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 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 21:06:33,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:06:33,153 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:06:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:06:33,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:06:33,808 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-11-07 21:06:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 222 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-07 21:06:34,268 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:06:35,206 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 21:06:35,321 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 21:06:35,595 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2018-11-07 21:06:36,322 WARN L179 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2018-11-07 21:06:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 112 proven. 211 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:06:37,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:06:37,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2018-11-07 21:06:37,022 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:06:37,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 21:06:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 21:06:37,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-11-07 21:06:37,023 INFO L87 Difference]: Start difference. First operand 9514 states and 11256 transitions. Second operand 10 states. [2018-11-07 21:06:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:06:51,656 INFO L93 Difference]: Finished difference Result 34866 states and 43370 transitions. [2018-11-07 21:06:51,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 21:06:51,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 280 [2018-11-07 21:06:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:06:51,803 INFO L225 Difference]: With dead ends: 34866 [2018-11-07 21:06:51,804 INFO L226 Difference]: Without dead ends: 25792 [2018-11-07 21:06:51,861 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 559 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2018-11-07 21:06:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25792 states. [2018-11-07 21:06:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25792 to 25678. [2018-11-07 21:06:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25678 states. [2018-11-07 21:06:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25678 states to 25678 states and 31043 transitions. [2018-11-07 21:06:52,545 INFO L78 Accepts]: Start accepts. Automaton has 25678 states and 31043 transitions. Word has length 280 [2018-11-07 21:06:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:06:52,547 INFO L480 AbstractCegarLoop]: Abstraction has 25678 states and 31043 transitions. [2018-11-07 21:06:52,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 21:06:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 25678 states and 31043 transitions. [2018-11-07 21:06:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-11-07 21:06:52,559 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:06:52,560 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:06:52,560 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:06:52,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:06:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1869107646, now seen corresponding path program 1 times [2018-11-07 21:06:52,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:06:52,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:52,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:06:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:06:52,562 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:06:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:06:53,090 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-11-07 21:06:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-07 21:06:53,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:06:53,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:06:53,145 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:06:53,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:06:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:06:53,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:06:53,146 INFO L87 Difference]: Start difference. First operand 25678 states and 31043 transitions. Second operand 4 states. [2018-11-07 21:06:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:06:59,758 INFO L93 Difference]: Finished difference Result 71757 states and 90928 transitions. [2018-11-07 21:06:59,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:06:59,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 303 [2018-11-07 21:06:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:06:59,987 INFO L225 Difference]: With dead ends: 71757 [2018-11-07 21:06:59,988 INFO L226 Difference]: Without dead ends: 46519 [2018-11-07 21:07:00,056 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:07:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46519 states. [2018-11-07 21:07:01,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46519 to 40774. [2018-11-07 21:07:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40774 states. [2018-11-07 21:07:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40774 states to 40774 states and 48954 transitions. [2018-11-07 21:07:01,155 INFO L78 Accepts]: Start accepts. Automaton has 40774 states and 48954 transitions. Word has length 303 [2018-11-07 21:07:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:01,156 INFO L480 AbstractCegarLoop]: Abstraction has 40774 states and 48954 transitions. [2018-11-07 21:07:01,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:07:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 40774 states and 48954 transitions. [2018-11-07 21:07:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-07 21:07:01,180 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:01,181 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-11-07 21:07:01,181 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:01,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:01,182 INFO L82 PathProgramCache]: Analyzing trace with hash -644961599, now seen corresponding path program 1 times [2018-11-07 21:07:01,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:01,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:01,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:01,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:01,183 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 365 proven. 2 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2018-11-07 21:07:01,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:01,658 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:07:01,658 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 378 with the following transitions: [2018-11-07 21:07:01,660 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:07:01,669 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:07:01,669 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:07:01,742 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:07:02,279 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:07:02,280 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-07 21:07:02,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:02,317 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:07:02,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:02,318 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 21:07:02,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:02,335 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:07:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:02,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:07:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 440 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-11-07 21:07:03,041 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:07:03,773 WARN L179 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2018-11-07 21:07:04,040 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 21:07:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 219 proven. 147 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2018-11-07 21:07:04,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:07:04,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-07 21:07:04,450 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:07:04,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 21:07:04,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 21:07:04,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-11-07 21:07:04,451 INFO L87 Difference]: Start difference. First operand 40774 states and 48954 transitions. Second operand 8 states. [2018-11-07 21:07:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:15,897 INFO L93 Difference]: Finished difference Result 115732 states and 140476 transitions. [2018-11-07 21:07:15,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 21:07:15,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 377 [2018-11-07 21:07:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:16,024 INFO L225 Difference]: With dead ends: 115732 [2018-11-07 21:07:16,024 INFO L226 Difference]: Without dead ends: 46509 [2018-11-07 21:07:16,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 772 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2018-11-07 21:07:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46509 states. [2018-11-07 21:07:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46509 to 43005. [2018-11-07 21:07:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43005 states. [2018-11-07 21:07:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43005 states to 43005 states and 50309 transitions. [2018-11-07 21:07:16,874 INFO L78 Accepts]: Start accepts. Automaton has 43005 states and 50309 transitions. Word has length 377 [2018-11-07 21:07:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:16,874 INFO L480 AbstractCegarLoop]: Abstraction has 43005 states and 50309 transitions. [2018-11-07 21:07:16,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-07 21:07:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 43005 states and 50309 transitions. [2018-11-07 21:07:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2018-11-07 21:07:16,894 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:16,894 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:16,895 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:16,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash -960300433, now seen corresponding path program 1 times [2018-11-07 21:07:16,895 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:16,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:16,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:16,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:16,896 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2018-11-07 21:07:17,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 21:07:17,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 21:07:17,283 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 21:07:17,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 21:07:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 21:07:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:07:17,284 INFO L87 Difference]: Start difference. First operand 43005 states and 50309 transitions. Second operand 4 states. [2018-11-07 21:07:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:07:21,693 INFO L93 Difference]: Finished difference Result 117395 states and 138169 transitions. [2018-11-07 21:07:21,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 21:07:21,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 445 [2018-11-07 21:07:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:07:21,887 INFO L225 Difference]: With dead ends: 117395 [2018-11-07 21:07:21,888 INFO L226 Difference]: Without dead ends: 69547 [2018-11-07 21:07:21,967 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 21:07:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69547 states. [2018-11-07 21:07:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69547 to 59537. [2018-11-07 21:07:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59537 states. [2018-11-07 21:07:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59537 states to 59537 states and 67965 transitions. [2018-11-07 21:07:23,228 INFO L78 Accepts]: Start accepts. Automaton has 59537 states and 67965 transitions. Word has length 445 [2018-11-07 21:07:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:07:23,228 INFO L480 AbstractCegarLoop]: Abstraction has 59537 states and 67965 transitions. [2018-11-07 21:07:23,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 21:07:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 59537 states and 67965 transitions. [2018-11-07 21:07:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-11-07 21:07:23,259 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:07:23,260 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2018-11-07 21:07:23,260 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:07:23,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1509201419, now seen corresponding path program 1 times [2018-11-07 21:07:23,261 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:07:23,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:23,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:23,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:07:23,262 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:07:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 110 proven. 344 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:07:25,197 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:25,197 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:07:25,197 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 522 with the following transitions: [2018-11-07 21:07:25,198 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1766], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1893], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:07:25,204 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:07:25,204 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:07:25,303 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:07:27,425 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:07:27,425 INFO L272 AbstractInterpreter]: Visited 221 different actions 1095 times. Merged at 8 different actions 37 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-07 21:07:27,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:07:27,439 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:07:27,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:07:27,439 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 21:07:27,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:07:27,448 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:07:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:07:27,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:07:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 422 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-11-07 21:07:28,360 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:07:29,408 WARN L179 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-11-07 21:07:29,792 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-11-07 21:07:29,992 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-07 21:07:30,035 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-07 21:07:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 108 proven. 346 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 21:07:31,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:07:31,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 26 [2018-11-07 21:07:31,590 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:07:31,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 21:07:31,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 21:07:31,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2018-11-07 21:07:31,591 INFO L87 Difference]: Start difference. First operand 59537 states and 67965 transitions. Second operand 21 states. [2018-11-07 21:07:38,226 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2018-11-07 21:07:39,441 WARN L179 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2018-11-07 21:07:40,945 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2018-11-07 21:07:41,976 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2018-11-07 21:07:42,133 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2018-11-07 21:07:43,553 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2018-11-07 21:07:43,894 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2018-11-07 21:07:44,376 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2018-11-07 21:07:46,497 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2018-11-07 21:07:47,537 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2018-11-07 21:07:49,643 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2018-11-07 21:07:50,025 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2018-11-07 21:07:51,836 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2018-11-07 21:07:52,723 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2018-11-07 21:07:53,101 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 21:07:54,743 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2018-11-07 21:07:55,065 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2018-11-07 21:07:55,457 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2018-11-07 21:07:56,192 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-11-07 21:07:58,324 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2018-11-07 21:07:58,992 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2018-11-07 21:08:04,792 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-11-07 21:08:05,879 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 21:08:06,223 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2018-11-07 21:08:07,981 WARN L179 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2018-11-07 21:08:10,253 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2018-11-07 21:08:11,575 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2018-11-07 21:08:11,720 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2018-11-07 21:08:14,411 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2018-11-07 21:08:14,930 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2018-11-07 21:08:17,138 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-11-07 21:08:17,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 21:08:17,263 INFO L93 Difference]: Finished difference Result 161354 states and 192930 transitions. [2018-11-07 21:08:17,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-11-07 21:08:17,264 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 521 [2018-11-07 21:08:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 21:08:17,653 INFO L225 Difference]: With dead ends: 161354 [2018-11-07 21:08:17,654 INFO L226 Difference]: Without dead ends: 100927 [2018-11-07 21:08:17,762 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1124 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7431 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=3422, Invalid=16884, Unknown=0, NotChecked=0, Total=20306 [2018-11-07 21:08:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100927 states. [2018-11-07 21:08:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100927 to 94891. [2018-11-07 21:08:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94891 states. [2018-11-07 21:08:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94891 states to 94891 states and 111394 transitions. [2018-11-07 21:08:19,954 INFO L78 Accepts]: Start accepts. Automaton has 94891 states and 111394 transitions. Word has length 521 [2018-11-07 21:08:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 21:08:19,954 INFO L480 AbstractCegarLoop]: Abstraction has 94891 states and 111394 transitions. [2018-11-07 21:08:19,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 21:08:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 94891 states and 111394 transitions. [2018-11-07 21:08:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2018-11-07 21:08:19,980 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 21:08:19,981 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 21:08:19,981 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 21:08:19,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1089551486, now seen corresponding path program 1 times [2018-11-07 21:08:19,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 21:08:19,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:19,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:19,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 21:08:19,984 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 21:08:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 407 proven. 32 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 21:08:20,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:20,609 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 21:08:20,609 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 550 with the following transitions: [2018-11-07 21:08:20,610 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [938], [940], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1239], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1893], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-07 21:08:20,615 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 21:08:20,615 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 21:08:20,668 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 21:08:23,589 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 21:08:23,589 INFO L272 AbstractInterpreter]: Visited 222 different actions 1557 times. Merged at 9 different actions 71 times. Widened at 1 different actions 2 times. Found 19 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-07 21:08:23,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 21:08:23,598 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 21:08:23,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 21:08:23,598 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 21:08:23,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 21:08:23,607 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 21:08:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 21:08:23,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 21:08:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 407 proven. 32 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 21:08:24,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 21:08:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 437 proven. 2 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-11-07 21:08:27,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 21:08:27,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2018-11-07 21:08:27,947 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 21:08:27,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 21:08:27,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 21:08:27,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-11-07 21:08:27,950 INFO L87 Difference]: Start difference. First operand 94891 states and 111394 transitions. Second operand 8 states. Received shutdown request... [2018-11-07 21:08:36,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 21:08:36,567 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 21:08:36,572 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 21:08:36,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 09:08:36 BoogieIcfgContainer [2018-11-07 21:08:36,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 21:08:36,573 INFO L168 Benchmark]: Toolchain (without parser) took 210062.30 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,574 INFO L168 Benchmark]: CDTParser took 0.29 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 21:08:36,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1657.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,576 INFO L168 Benchmark]: Boogie Procedure Inliner took 259.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -984.1 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,577 INFO L168 Benchmark]: Boogie Preprocessor took 190.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,578 INFO L168 Benchmark]: RCFGBuilder took 8539.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 471.3 MB). Peak memory consumption was 471.3 MB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,579 INFO L168 Benchmark]: TraceAbstraction took 199410.98 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.5 GB). Free memory was 1.8 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 21:08:36,584 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 1657.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 259.54 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 791.7 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -984.1 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 190.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8539.29 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 471.3 MB). Peak memory consumption was 471.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 199410.98 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.5 GB). Free memory was 1.8 GB in the beginning and 3.2 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 110). Cancelled while BasicCegarLoop was constructing difference of abstraction (94891states) and FLOYD_HOARE automaton (currently 15 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (115776 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 199.3s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 161.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6101 SDtfs, 32447 SDslu, 5006 SDs, 0 SdLazy, 58291 SolverSat, 11374 SolverUnsat, 113 SolverUnknown, 0 SolverNotchecked, 103.8s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 4055 GetRequests, 3801 SyntacticMatches, 10 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7854 ImplicationChecksByTransitivity, 19.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94891occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.3s AbstIntTime, 5 AbstIntIterations, 1 AbstIntStrong, 0.9977327865902852 AbsIntWeakeningRatio, 0.11894273127753303 AbsIntAvgWeakeningVarsNumRemoved, 19.334801762114537 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.7s AutomataMinimizationTime, 12 MinimizatonAttempts, 25969 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 18.9s InterpolantComputationTime, 5336 NumberOfCodeBlocks, 5336 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 7042 ConstructedInterpolants, 191 QuantifiedInterpolants, 16309199 SizeOfPredicates, 11 NumberOfNonLiveVariables, 2739 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 21 InterpolantComputations, 8 PerfectInterpolantSequences, 6087/7423 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown