java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 18:04:25,256 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 18:04:25,258 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 18:04:25,271 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 18:04:25,271 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 18:04:25,272 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 18:04:25,274 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 18:04:25,275 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 18:04:25,277 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 18:04:25,278 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 18:04:25,279 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 18:04:25,279 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 18:04:25,280 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 18:04:25,281 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 18:04:25,282 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 18:04:25,283 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 18:04:25,284 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 18:04:25,286 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 18:04:25,288 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 18:04:25,289 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 18:04:25,291 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 18:04:25,292 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 18:04:25,296 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 18:04:25,297 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 18:04:25,297 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 18:04:25,301 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 18:04:25,302 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 18:04:25,305 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 18:04:25,306 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 18:04:25,307 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 18:04:25,307 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 18:04:25,311 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 18:04:25,311 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 18:04:25,311 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 18:04:25,312 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 18:04:25,315 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 18:04:25,316 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 18:04:25,346 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 18:04:25,346 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 18:04:25,348 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 18:04:25,348 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 18:04:25,348 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 18:04:25,348 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 18:04:25,348 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 18:04:25,349 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 18:04:25,349 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 18:04:25,349 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 18:04:25,349 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 18:04:25,349 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 18:04:25,350 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 18:04:25,351 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 18:04:25,351 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 18:04:25,351 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 18:04:25,351 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 18:04:25,351 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 18:04:25,352 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 18:04:25,353 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 18:04:25,354 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 18:04:25,354 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 18:04:25,354 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 18:04:25,354 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 18:04:25,354 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 18:04:25,355 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:04:25,355 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 18:04:25,355 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 18:04:25,356 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 18:04:25,357 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 18:04:25,408 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 18:04:25,421 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 18:04:25,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 18:04:25,427 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 18:04:25,427 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 18:04:25,428 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-11-07 18:04:25,494 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae54ff5ef/b5c1f42e7fc240f8a67dceaec65e2b95/FLAG4bf9434be [2018-11-07 18:04:26,122 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 18:04:26,124 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54_false-unreach-call_false-termination.c [2018-11-07 18:04:26,143 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae54ff5ef/b5c1f42e7fc240f8a67dceaec65e2b95/FLAG4bf9434be [2018-11-07 18:04:26,159 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae54ff5ef/b5c1f42e7fc240f8a67dceaec65e2b95 [2018-11-07 18:04:26,169 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 18:04:26,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 18:04:26,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:26,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 18:04:26,176 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 18:04:26,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:26,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b29a96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26, skipping insertion in model container [2018-11-07 18:04:26,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:26,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 18:04:26,257 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 18:04:26,830 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:26,836 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 18:04:26,955 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 18:04:26,973 INFO L193 MainTranslator]: Completed translation [2018-11-07 18:04:26,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26 WrapperNode [2018-11-07 18:04:26,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 18:04:26,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:26,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 18:04:26,975 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 18:04:26,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 18:04:27,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 18:04:27,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 18:04:27,111 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 18:04:27,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... [2018-11-07 18:04:27,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 18:04:27,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 18:04:27,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 18:04:27,229 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 18:04:27,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 18:04:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 18:04:27,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 18:04:27,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 18:04:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 18:04:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 18:04:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 18:04:27,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 18:04:27,300 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 18:04:27,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 18:04:30,746 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 18:04:30,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:30 BoogieIcfgContainer [2018-11-07 18:04:30,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 18:04:30,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 18:04:30,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 18:04:30,752 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 18:04:30,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:04:26" (1/3) ... [2018-11-07 18:04:30,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1cdbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:30, skipping insertion in model container [2018-11-07 18:04:30,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:04:26" (2/3) ... [2018-11-07 18:04:30,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1cdbfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:04:30, skipping insertion in model container [2018-11-07 18:04:30,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:04:30" (3/3) ... [2018-11-07 18:04:30,756 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label54_false-unreach-call_false-termination.c [2018-11-07 18:04:30,765 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 18:04:30,774 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 18:04:30,792 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 18:04:30,831 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 18:04:30,831 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 18:04:30,831 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 18:04:30,831 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 18:04:30,831 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 18:04:30,832 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 18:04:30,832 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 18:04:30,832 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 18:04:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 18:04:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-07 18:04:30,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:30,870 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:30,873 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:30,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:30,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1737204119, now seen corresponding path program 1 times [2018-11-07 18:04:30,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:30,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:30,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:30,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:30,925 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:31,145 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:31,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:04:31,145 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:31,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:04:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:04:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:31,172 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 18:04:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:33,365 INFO L93 Difference]: Finished difference Result 707 states and 1242 transitions. [2018-11-07 18:04:33,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:04:33,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-07 18:04:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:33,388 INFO L225 Difference]: With dead ends: 707 [2018-11-07 18:04:33,388 INFO L226 Difference]: Without dead ends: 450 [2018-11-07 18:04:33,397 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2018-11-07 18:04:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 450. [2018-11-07 18:04:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2018-11-07 18:04:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 678 transitions. [2018-11-07 18:04:33,481 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 678 transitions. Word has length 13 [2018-11-07 18:04:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:33,482 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 678 transitions. [2018-11-07 18:04:33,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:04:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 678 transitions. [2018-11-07 18:04:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-07 18:04:33,488 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:33,488 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:33,489 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:33,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1515047808, now seen corresponding path program 1 times [2018-11-07 18:04:33,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:33,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:33,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:33,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:33,491 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:33,754 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:04:33,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:04:33,754 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:33,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:04:33,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:04:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:33,757 INFO L87 Difference]: Start difference. First operand 450 states and 678 transitions. Second operand 3 states. [2018-11-07 18:04:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:35,223 INFO L93 Difference]: Finished difference Result 1260 states and 1959 transitions. [2018-11-07 18:04:35,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:04:35,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2018-11-07 18:04:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:35,232 INFO L225 Difference]: With dead ends: 1260 [2018-11-07 18:04:35,232 INFO L226 Difference]: Without dead ends: 816 [2018-11-07 18:04:35,239 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:04:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2018-11-07 18:04:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2018-11-07 18:04:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2018-11-07 18:04:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1139 transitions. [2018-11-07 18:04:35,299 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1139 transitions. Word has length 97 [2018-11-07 18:04:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:35,301 INFO L480 AbstractCegarLoop]: Abstraction has 816 states and 1139 transitions. [2018-11-07 18:04:35,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:04:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1139 transitions. [2018-11-07 18:04:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 18:04:35,307 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:35,307 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:35,307 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:35,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash -966929960, now seen corresponding path program 1 times [2018-11-07 18:04:35,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:35,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:35,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:35,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:35,310 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:35,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:35,592 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:35,593 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 110 with the following transitions: [2018-11-07 18:04:35,597 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:35,660 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:35,660 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:36,280 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:04:36,282 INFO L272 AbstractInterpreter]: Visited 100 different actions 100 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 18:04:36,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:36,318 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:04:36,734 INFO L227 lantSequenceWeakener]: Weakened 103 states. On average, predicates are now at 76.96% of their original sizes. [2018-11-07 18:04:36,735 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:04:37,091 INFO L415 sIntCurrentIteration]: We unified 108 AI predicates to 108 [2018-11-07 18:04:37,091 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:04:37,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:04:37,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-07 18:04:37,093 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:37,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:04:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:04:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 18:04:37,094 INFO L87 Difference]: Start difference. First operand 816 states and 1139 transitions. Second operand 7 states. [2018-11-07 18:04:39,344 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:04:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:04:46,962 INFO L93 Difference]: Finished difference Result 1811 states and 2515 transitions. [2018-11-07 18:04:46,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 18:04:46,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2018-11-07 18:04:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:04:46,969 INFO L225 Difference]: With dead ends: 1811 [2018-11-07 18:04:46,969 INFO L226 Difference]: Without dead ends: 1001 [2018-11-07 18:04:46,972 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:04:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2018-11-07 18:04:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 999. [2018-11-07 18:04:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2018-11-07 18:04:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1330 transitions. [2018-11-07 18:04:47,002 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1330 transitions. Word has length 109 [2018-11-07 18:04:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:04:47,002 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 1330 transitions. [2018-11-07 18:04:47,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:04:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1330 transitions. [2018-11-07 18:04:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-07 18:04:47,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:04:47,009 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:04:47,009 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:04:47,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1447044886, now seen corresponding path program 1 times [2018-11-07 18:04:47,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:04:47,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:47,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:04:47,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:04:47,011 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:04:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:04:47,846 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 18:04:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:04:48,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:04:48,285 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:04:48,285 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 195 with the following transitions: [2018-11-07 18:04:48,286 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:04:48,293 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:04:48,293 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:04:48,668 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:04:48,668 INFO L272 AbstractInterpreter]: Visited 104 different actions 204 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:04:48,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:04:48,707 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:04:49,090 INFO L227 lantSequenceWeakener]: Weakened 71 states. On average, predicates are now at 77.49% of their original sizes. [2018-11-07 18:04:49,090 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:04:50,821 INFO L415 sIntCurrentIteration]: We unified 193 AI predicates to 193 [2018-11-07 18:04:50,821 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:04:50,821 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:04:50,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [28] imperfect sequences [12] total 38 [2018-11-07 18:04:50,821 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:04:50,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-07 18:04:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-07 18:04:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2018-11-07 18:04:50,823 INFO L87 Difference]: Start difference. First operand 999 states and 1330 transitions. Second operand 28 states. [2018-11-07 18:04:59,553 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:10,007 INFO L93 Difference]: Finished difference Result 2525 states and 3402 transitions. [2018-11-07 18:05:10,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 18:05:10,008 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 194 [2018-11-07 18:05:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:10,017 INFO L225 Difference]: With dead ends: 2525 [2018-11-07 18:05:10,018 INFO L226 Difference]: Without dead ends: 1715 [2018-11-07 18:05:10,023 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 209 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2018-11-07 18:05:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2018-11-07 18:05:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1707. [2018-11-07 18:05:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2018-11-07 18:05:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2071 transitions. [2018-11-07 18:05:10,077 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2071 transitions. Word has length 194 [2018-11-07 18:05:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:10,078 INFO L480 AbstractCegarLoop]: Abstraction has 1707 states and 2071 transitions. [2018-11-07 18:05:10,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-07 18:05:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2071 transitions. [2018-11-07 18:05:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-11-07 18:05:10,084 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:10,085 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:10,085 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:10,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash -71904578, now seen corresponding path program 1 times [2018-11-07 18:05:10,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:10,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:10,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:10,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:10,087 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:10,619 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:10,819 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 18:05:11,039 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:05:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 18:05:11,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:11,758 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:11,758 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2018-11-07 18:05:11,759 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:11,763 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:11,763 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:11,927 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:11,927 INFO L272 AbstractInterpreter]: Visited 119 different actions 232 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 18:05:11,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:11,956 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:12,224 INFO L227 lantSequenceWeakener]: Weakened 106 states. On average, predicates are now at 77.52% of their original sizes. [2018-11-07 18:05:12,224 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:12,948 INFO L415 sIntCurrentIteration]: We unified 219 AI predicates to 219 [2018-11-07 18:05:12,948 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:12,948 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:12,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 31 [2018-11-07 18:05:12,949 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:12,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:05:12,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:05:12,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:05:12,950 INFO L87 Difference]: Start difference. First operand 1707 states and 2071 transitions. Second operand 18 states. [2018-11-07 18:05:19,987 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:27,670 INFO L93 Difference]: Finished difference Result 2888 states and 3640 transitions. [2018-11-07 18:05:27,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-07 18:05:27,671 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 220 [2018-11-07 18:05:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:27,681 INFO L225 Difference]: With dead ends: 2888 [2018-11-07 18:05:27,681 INFO L226 Difference]: Without dead ends: 2078 [2018-11-07 18:05:27,685 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 238 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 18:05:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2018-11-07 18:05:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1892. [2018-11-07 18:05:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1892 states. [2018-11-07 18:05:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2263 transitions. [2018-11-07 18:05:27,737 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2263 transitions. Word has length 220 [2018-11-07 18:05:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:27,737 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 2263 transitions. [2018-11-07 18:05:27,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:05:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2263 transitions. [2018-11-07 18:05:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-07 18:05:27,742 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:27,742 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:27,742 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:27,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2114463494, now seen corresponding path program 1 times [2018-11-07 18:05:27,743 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:27,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:27,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:27,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:27,744 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-07 18:05:27,990 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:05:27,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:05:27,991 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:27,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:05:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:05:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:05:27,992 INFO L87 Difference]: Start difference. First operand 1892 states and 2263 transitions. Second operand 4 states. [2018-11-07 18:05:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:29,613 INFO L93 Difference]: Finished difference Result 3434 states and 4635 transitions. [2018-11-07 18:05:29,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:05:29,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 234 [2018-11-07 18:05:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:29,628 INFO L225 Difference]: With dead ends: 3434 [2018-11-07 18:05:29,628 INFO L226 Difference]: Without dead ends: 2624 [2018-11-07 18:05:29,635 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:05:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2018-11-07 18:05:29,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2624. [2018-11-07 18:05:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2624 states. [2018-11-07 18:05:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 3318 transitions. [2018-11-07 18:05:29,700 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 3318 transitions. Word has length 234 [2018-11-07 18:05:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:29,701 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 3318 transitions. [2018-11-07 18:05:29,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:05:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 3318 transitions. [2018-11-07 18:05:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-07 18:05:29,708 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:29,708 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:29,708 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:29,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash 303357292, now seen corresponding path program 1 times [2018-11-07 18:05:29,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:29,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:29,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 106 proven. 95 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-11-07 18:05:30,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:30,025 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:30,025 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-07 18:05:30,026 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:30,029 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:30,029 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:30,390 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:30,391 INFO L272 AbstractInterpreter]: Visited 120 different actions 362 times. Merged at 7 different actions 24 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:05:30,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:30,417 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:30,984 INFO L227 lantSequenceWeakener]: Weakened 40 states. On average, predicates are now at 77.66% of their original sizes. [2018-11-07 18:05:30,985 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:32,859 INFO L415 sIntCurrentIteration]: We unified 304 AI predicates to 304 [2018-11-07 18:05:32,860 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:32,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:32,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [24] imperfect sequences [6] total 28 [2018-11-07 18:05:32,861 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:32,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-07 18:05:32,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-07 18:05:32,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:05:32,863 INFO L87 Difference]: Start difference. First operand 2624 states and 3318 transitions. Second operand 24 states. [2018-11-07 18:05:42,983 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:05:57,747 INFO L93 Difference]: Finished difference Result 6593 states and 8485 transitions. [2018-11-07 18:05:57,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 18:05:57,748 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 305 [2018-11-07 18:05:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:05:57,768 INFO L225 Difference]: With dead ends: 6593 [2018-11-07 18:05:57,768 INFO L226 Difference]: Without dead ends: 5051 [2018-11-07 18:05:57,779 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 329 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2018-11-07 18:05:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2018-11-07 18:05:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4316. [2018-11-07 18:05:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4316 states. [2018-11-07 18:05:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 5161 transitions. [2018-11-07 18:05:57,889 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 5161 transitions. Word has length 305 [2018-11-07 18:05:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:05:57,891 INFO L480 AbstractCegarLoop]: Abstraction has 4316 states and 5161 transitions. [2018-11-07 18:05:57,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-07 18:05:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 5161 transitions. [2018-11-07 18:05:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-07 18:05:57,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:05:57,901 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:05:57,901 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:05:57,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash -695505714, now seen corresponding path program 1 times [2018-11-07 18:05:57,902 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:05:57,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:57,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:05:57,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:05:57,903 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:05:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:05:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 156 proven. 45 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-07 18:05:58,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:05:58,234 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:05:58,234 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 306 with the following transitions: [2018-11-07 18:05:58,234 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:05:58,237 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:05:58,237 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:05:58,413 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:05:58,555 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:05:58,556 INFO L272 AbstractInterpreter]: Visited 120 different actions 357 times. Merged at 7 different actions 19 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 18:05:58,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:05:58,586 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:05:58,920 INFO L227 lantSequenceWeakener]: Weakened 302 states. On average, predicates are now at 79.93% of their original sizes. [2018-11-07 18:05:58,921 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:05:59,692 INFO L415 sIntCurrentIteration]: We unified 304 AI predicates to 304 [2018-11-07 18:05:59,692 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:05:59,693 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:05:59,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 18:05:59,693 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:05:59,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:05:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:05:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 18:05:59,694 INFO L87 Difference]: Start difference. First operand 4316 states and 5161 transitions. Second operand 10 states. [2018-11-07 18:06:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:05,257 INFO L93 Difference]: Finished difference Result 8480 states and 10506 transitions. [2018-11-07 18:06:05,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 18:06:05,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 305 [2018-11-07 18:06:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:05,278 INFO L225 Difference]: With dead ends: 8480 [2018-11-07 18:06:05,278 INFO L226 Difference]: Without dead ends: 5431 [2018-11-07 18:06:05,290 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 312 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2018-11-07 18:06:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2018-11-07 18:06:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5046. [2018-11-07 18:06:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5046 states. [2018-11-07 18:06:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5046 states to 5046 states and 6041 transitions. [2018-11-07 18:06:05,413 INFO L78 Accepts]: Start accepts. Automaton has 5046 states and 6041 transitions. Word has length 305 [2018-11-07 18:06:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:05,413 INFO L480 AbstractCegarLoop]: Abstraction has 5046 states and 6041 transitions. [2018-11-07 18:06:05,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:06:05,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5046 states and 6041 transitions. [2018-11-07 18:06:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-11-07 18:06:05,421 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:05,421 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:05,421 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:05,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1390657654, now seen corresponding path program 1 times [2018-11-07 18:06:05,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:05,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:05,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:05,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:05,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-07 18:06:05,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:05,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 18:06:05,641 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:05,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 18:06:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 18:06:05,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:06:05,642 INFO L87 Difference]: Start difference. First operand 5046 states and 6041 transitions. Second operand 3 states. [2018-11-07 18:06:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:06,944 INFO L93 Difference]: Finished difference Result 8249 states and 10661 transitions. [2018-11-07 18:06:06,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 18:06:06,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 319 [2018-11-07 18:06:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:06,968 INFO L225 Difference]: With dead ends: 8249 [2018-11-07 18:06:06,968 INFO L226 Difference]: Without dead ends: 5961 [2018-11-07 18:06:06,979 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 18:06:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2018-11-07 18:06:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 5961. [2018-11-07 18:06:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5961 states. [2018-11-07 18:06:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5961 states to 5961 states and 7174 transitions. [2018-11-07 18:06:07,118 INFO L78 Accepts]: Start accepts. Automaton has 5961 states and 7174 transitions. Word has length 319 [2018-11-07 18:06:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:07,119 INFO L480 AbstractCegarLoop]: Abstraction has 5961 states and 7174 transitions. [2018-11-07 18:06:07,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 18:06:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5961 states and 7174 transitions. [2018-11-07 18:06:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2018-11-07 18:06:07,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:07,133 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:07,133 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:07,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1833483425, now seen corresponding path program 1 times [2018-11-07 18:06:07,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:07,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:07,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:07,136 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 313 proven. 161 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 18:06:08,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:08,023 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:08,023 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 404 with the following transitions: [2018-11-07 18:06:08,023 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [598], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:08,025 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:08,026 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:08,144 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:08,418 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:08,418 INFO L272 AbstractInterpreter]: Visited 122 different actions 604 times. Merged at 9 different actions 41 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:08,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:08,429 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:08,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:08,429 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:08,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:08,705 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:08,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:09,323 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 18:06:09,694 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 18:06:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 18:06:09,937 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:10,786 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2018-11-07 18:06:10,899 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:06:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-11-07 18:06:11,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:11,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:06:11,294 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:11,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:06:11,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:06:11,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:06:11,297 INFO L87 Difference]: Start difference. First operand 5961 states and 7174 transitions. Second operand 17 states. [2018-11-07 18:06:12,210 WARN L179 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-11-07 18:06:14,463 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-11-07 18:06:19,440 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-11-07 18:06:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:20,595 INFO L93 Difference]: Finished difference Result 12551 states and 16412 transitions. [2018-11-07 18:06:20,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-07 18:06:20,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 403 [2018-11-07 18:06:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:20,621 INFO L225 Difference]: With dead ends: 12551 [2018-11-07 18:06:20,622 INFO L226 Difference]: Without dead ends: 4550 [2018-11-07 18:06:20,686 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 817 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=521, Invalid=1735, Unknown=0, NotChecked=0, Total=2256 [2018-11-07 18:06:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4550 states. [2018-11-07 18:06:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4550 to 3610. [2018-11-07 18:06:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2018-11-07 18:06:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 4203 transitions. [2018-11-07 18:06:20,836 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 4203 transitions. Word has length 403 [2018-11-07 18:06:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:20,837 INFO L480 AbstractCegarLoop]: Abstraction has 3610 states and 4203 transitions. [2018-11-07 18:06:20,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:06:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 4203 transitions. [2018-11-07 18:06:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2018-11-07 18:06:20,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:20,845 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:20,845 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:20,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:20,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1139655653, now seen corresponding path program 1 times [2018-11-07 18:06:20,846 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:20,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:20,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:20,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:20,850 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:21,231 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-07 18:06:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 44 proven. 185 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-11-07 18:06:21,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:21,929 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:21,930 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 409 with the following transitions: [2018-11-07 18:06:21,930 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:21,936 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:21,937 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:22,338 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:23,338 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 18:06:23,338 INFO L272 AbstractInterpreter]: Visited 183 different actions 729 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:23,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:23,375 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 18:06:24,272 INFO L227 lantSequenceWeakener]: Weakened 140 states. On average, predicates are now at 79.17% of their original sizes. [2018-11-07 18:06:24,272 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 18:06:26,179 INFO L415 sIntCurrentIteration]: We unified 407 AI predicates to 407 [2018-11-07 18:06:26,180 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 18:06:26,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 18:06:26,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [5] total 24 [2018-11-07 18:06:26,180 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:26,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 18:06:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 18:06:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2018-11-07 18:06:26,182 INFO L87 Difference]: Start difference. First operand 3610 states and 4203 transitions. Second operand 21 states. [2018-11-07 18:06:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:43,121 INFO L93 Difference]: Finished difference Result 9307 states and 11022 transitions. [2018-11-07 18:06:43,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 18:06:43,121 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 408 [2018-11-07 18:06:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:43,139 INFO L225 Difference]: With dead ends: 9307 [2018-11-07 18:06:43,140 INFO L226 Difference]: Without dead ends: 6071 [2018-11-07 18:06:43,151 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 429 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2018-11-07 18:06:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2018-11-07 18:06:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 5886. [2018-11-07 18:06:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5886 states. [2018-11-07 18:06:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5886 states to 5886 states and 6576 transitions. [2018-11-07 18:06:43,320 INFO L78 Accepts]: Start accepts. Automaton has 5886 states and 6576 transitions. Word has length 408 [2018-11-07 18:06:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:43,321 INFO L480 AbstractCegarLoop]: Abstraction has 5886 states and 6576 transitions. [2018-11-07 18:06:43,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 18:06:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 5886 states and 6576 transitions. [2018-11-07 18:06:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-11-07 18:06:43,343 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:43,344 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:43,344 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:43,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash -992715388, now seen corresponding path program 1 times [2018-11-07 18:06:43,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:43,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:43,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:43,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:43,346 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-11-07 18:06:44,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:44,264 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:44,264 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-11-07 18:06:44,264 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [514], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:44,268 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:44,268 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:44,536 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:45,729 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:45,730 INFO L272 AbstractInterpreter]: Visited 192 different actions 965 times. Merged at 10 different actions 53 times. Widened at 1 different actions 1 times. Found 13 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:45,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:45,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:45,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:45,740 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:45,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:45,749 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:45,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 666 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2018-11-07 18:06:46,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 388 proven. 74 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2018-11-07 18:06:46,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:46,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 18:06:46,764 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 18:06:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 18:06:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 18:06:46,766 INFO L87 Difference]: Start difference. First operand 5886 states and 6576 transitions. Second operand 7 states. [2018-11-07 18:06:49,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:49,349 INFO L93 Difference]: Finished difference Result 14072 states and 17957 transitions. [2018-11-07 18:06:49,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 18:06:49,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 607 [2018-11-07 18:06:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:49,405 INFO L225 Difference]: With dead ends: 14072 [2018-11-07 18:06:49,405 INFO L226 Difference]: Without dead ends: 8747 [2018-11-07 18:06:49,437 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 1216 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 18:06:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8747 states. [2018-11-07 18:06:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8747 to 8534. [2018-11-07 18:06:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8534 states. [2018-11-07 18:06:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 9966 transitions. [2018-11-07 18:06:49,730 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 9966 transitions. Word has length 607 [2018-11-07 18:06:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:49,731 INFO L480 AbstractCegarLoop]: Abstraction has 8534 states and 9966 transitions. [2018-11-07 18:06:49,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 18:06:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 9966 transitions. [2018-11-07 18:06:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-11-07 18:06:49,747 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:49,747 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:49,747 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:49,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1365388396, now seen corresponding path program 1 times [2018-11-07 18:06:49,748 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:49,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:49,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:49,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:49,749 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2018-11-07 18:06:50,680 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 18:06:50,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 18:06:50,680 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 18:06:50,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 18:06:50,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 18:06:50,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:50,682 INFO L87 Difference]: Start difference. First operand 8534 states and 9966 transitions. Second operand 4 states. [2018-11-07 18:06:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:52,467 INFO L93 Difference]: Finished difference Result 21870 states and 28129 transitions. [2018-11-07 18:06:52,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 18:06:52,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 663 [2018-11-07 18:06:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:52,531 INFO L225 Difference]: With dead ends: 21870 [2018-11-07 18:06:52,531 INFO L226 Difference]: Without dead ends: 11262 [2018-11-07 18:06:52,606 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 18:06:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11262 states. [2018-11-07 18:06:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11262 to 11079. [2018-11-07 18:06:52,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11079 states. [2018-11-07 18:06:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 12971 transitions. [2018-11-07 18:06:52,904 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 12971 transitions. Word has length 663 [2018-11-07 18:06:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:52,905 INFO L480 AbstractCegarLoop]: Abstraction has 11079 states and 12971 transitions. [2018-11-07 18:06:52,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 18:06:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 12971 transitions. [2018-11-07 18:06:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2018-11-07 18:06:52,927 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:06:52,927 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:06:52,928 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:06:52,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash -675509568, now seen corresponding path program 1 times [2018-11-07 18:06:52,928 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:06:52,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:52,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:52,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:06:52,930 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:06:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:06:54,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:54,022 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:06:54,022 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 734 with the following transitions: [2018-11-07 18:06:54,022 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:06:54,025 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:06:54,025 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:06:54,263 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:06:55,319 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:06:55,319 INFO L272 AbstractInterpreter]: Visited 192 different actions 1156 times. Merged at 10 different actions 64 times. Widened at 1 different actions 2 times. Found 16 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 18:06:55,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:06:55,322 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:06:55,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:06:55,323 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:06:55,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:06:55,334 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:06:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:06:55,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:06:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:06:55,766 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:06:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 548 proven. 2 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2018-11-07 18:06:56,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:06:56,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2018-11-07 18:06:56,134 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:06:56,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 18:06:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 18:06:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-07 18:06:56,137 INFO L87 Difference]: Start difference. First operand 11079 states and 12971 transitions. Second operand 10 states. [2018-11-07 18:06:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:06:59,310 INFO L93 Difference]: Finished difference Result 26269 states and 32158 transitions. [2018-11-07 18:06:59,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-07 18:06:59,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 733 [2018-11-07 18:06:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:06:59,381 INFO L225 Difference]: With dead ends: 26269 [2018-11-07 18:06:59,382 INFO L226 Difference]: Without dead ends: 15751 [2018-11-07 18:06:59,442 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1475 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2018-11-07 18:06:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2018-11-07 18:06:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 15546. [2018-11-07 18:06:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15546 states. [2018-11-07 18:06:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 17911 transitions. [2018-11-07 18:06:59,994 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 17911 transitions. Word has length 733 [2018-11-07 18:06:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:06:59,995 INFO L480 AbstractCegarLoop]: Abstraction has 15546 states and 17911 transitions. [2018-11-07 18:06:59,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 18:06:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 17911 transitions. [2018-11-07 18:07:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2018-11-07 18:07:00,026 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:00,026 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:00,026 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:00,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2016796591, now seen corresponding path program 1 times [2018-11-07 18:07:00,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:00,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:00,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:00,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:00,028 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 408 proven. 890 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2018-11-07 18:07:01,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:01,837 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:01,837 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 814 with the following transitions: [2018-11-07 18:07:01,838 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [910], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:01,840 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:01,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:02,001 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:02,933 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:02,933 INFO L272 AbstractInterpreter]: Visited 193 different actions 1162 times. Merged at 11 different actions 64 times. Widened at 1 different actions 2 times. Found 18 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 18:07:02,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:02,940 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:02,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:02,940 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:02,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:02,952 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:03,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:04,078 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-11-07 18:07:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 1252 proven. 2 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2018-11-07 18:07:04,446 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 465 proven. 221 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2018-11-07 18:07:05,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:05,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 18:07:05,534 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:05,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:07:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:07:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:05,536 INFO L87 Difference]: Start difference. First operand 15546 states and 17911 transitions. Second operand 17 states. [2018-11-07 18:07:05,701 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2018-11-07 18:07:06,362 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2018-11-07 18:07:09,767 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2018-11-07 18:07:10,016 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2018-11-07 18:07:10,251 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-11-07 18:07:10,610 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-11-07 18:07:10,829 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2018-11-07 18:07:11,127 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-07 18:07:14,346 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2018-11-07 18:07:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:15,143 INFO L93 Difference]: Finished difference Result 33604 states and 39163 transitions. [2018-11-07 18:07:15,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-07 18:07:15,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 813 [2018-11-07 18:07:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:15,203 INFO L225 Difference]: With dead ends: 33604 [2018-11-07 18:07:15,203 INFO L226 Difference]: Without dead ends: 17551 [2018-11-07 18:07:15,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1722 GetRequests, 1657 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=873, Invalid=3549, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 18:07:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17551 states. [2018-11-07 18:07:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17551 to 17246. [2018-11-07 18:07:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17246 states. [2018-11-07 18:07:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17246 states to 17246 states and 19674 transitions. [2018-11-07 18:07:15,609 INFO L78 Accepts]: Start accepts. Automaton has 17246 states and 19674 transitions. Word has length 813 [2018-11-07 18:07:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:15,610 INFO L480 AbstractCegarLoop]: Abstraction has 17246 states and 19674 transitions. [2018-11-07 18:07:15,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 18:07:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17246 states and 19674 transitions. [2018-11-07 18:07:15,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2018-11-07 18:07:15,642 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:15,642 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:15,643 INFO L423 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:15,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:15,643 INFO L82 PathProgramCache]: Analyzing trace with hash 749842866, now seen corresponding path program 1 times [2018-11-07 18:07:15,643 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:15,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:15,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:15,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:15,644 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 588 proven. 221 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2018-11-07 18:07:16,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:16,533 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:16,533 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 918 with the following transitions: [2018-11-07 18:07:16,533 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:16,536 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:16,536 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:16,693 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:17,561 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:17,561 INFO L272 AbstractInterpreter]: Visited 194 different actions 1171 times. Merged at 12 different actions 67 times. Widened at 1 different actions 2 times. Found 22 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:07:17,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:17,568 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:17,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:17,568 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:17,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:17,579 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:17,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1563 proven. 2 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2018-11-07 18:07:18,372 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 588 proven. 221 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2018-11-07 18:07:19,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:19,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-11-07 18:07:19,058 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:19,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 18:07:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 18:07:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 18:07:19,060 INFO L87 Difference]: Start difference. First operand 17246 states and 19674 transitions. Second operand 6 states. [2018-11-07 18:07:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:20,812 INFO L93 Difference]: Finished difference Result 34214 states and 39611 transitions. [2018-11-07 18:07:20,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-07 18:07:20,813 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 917 [2018-11-07 18:07:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:20,864 INFO L225 Difference]: With dead ends: 34214 [2018-11-07 18:07:20,864 INFO L226 Difference]: Without dead ends: 18836 [2018-11-07 18:07:20,904 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1846 GetRequests, 1835 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-11-07 18:07:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18836 states. [2018-11-07 18:07:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18836 to 18350. [2018-11-07 18:07:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18350 states. [2018-11-07 18:07:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18350 states to 18350 states and 20610 transitions. [2018-11-07 18:07:21,272 INFO L78 Accepts]: Start accepts. Automaton has 18350 states and 20610 transitions. Word has length 917 [2018-11-07 18:07:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:21,273 INFO L480 AbstractCegarLoop]: Abstraction has 18350 states and 20610 transitions. [2018-11-07 18:07:21,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 18:07:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 18350 states and 20610 transitions. [2018-11-07 18:07:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1013 [2018-11-07 18:07:21,313 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:21,314 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:21,314 INFO L423 AbstractCegarLoop]: === Iteration 17 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:21,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1292338358, now seen corresponding path program 1 times [2018-11-07 18:07:21,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:21,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:21,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:21,316 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 450 proven. 1418 refuted. 0 times theorem prover too weak. 1015 trivial. 0 not checked. [2018-11-07 18:07:25,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:25,114 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:25,114 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1013 with the following transitions: [2018-11-07 18:07:25,115 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:25,117 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:25,118 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:25,345 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:26,295 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:26,295 INFO L272 AbstractInterpreter]: Visited 195 different actions 987 times. Merged at 12 different actions 60 times. Widened at 1 different actions 1 times. Found 21 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:07:26,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:26,302 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:26,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:26,302 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:26,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:26,310 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:26,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 1992 proven. 2 refuted. 0 times theorem prover too weak. 889 trivial. 0 not checked. [2018-11-07 18:07:27,236 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:27,463 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2018-11-07 18:07:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 451 proven. 470 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-11-07 18:07:28,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:28,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 20 [2018-11-07 18:07:28,387 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:28,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 18:07:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 18:07:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:28,389 INFO L87 Difference]: Start difference. First operand 18350 states and 20610 transitions. Second operand 18 states. [2018-11-07 18:07:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:37,772 INFO L93 Difference]: Finished difference Result 34464 states and 38883 transitions. [2018-11-07 18:07:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-07 18:07:37,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1012 [2018-11-07 18:07:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:37,812 INFO L225 Difference]: With dead ends: 34464 [2018-11-07 18:07:37,812 INFO L226 Difference]: Without dead ends: 16675 [2018-11-07 18:07:37,850 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2115 GetRequests, 2051 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=830, Invalid=3460, Unknown=0, NotChecked=0, Total=4290 [2018-11-07 18:07:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16675 states. [2018-11-07 18:07:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16675 to 16329. [2018-11-07 18:07:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16329 states. [2018-11-07 18:07:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16329 states to 16329 states and 17739 transitions. [2018-11-07 18:07:38,142 INFO L78 Accepts]: Start accepts. Automaton has 16329 states and 17739 transitions. Word has length 1012 [2018-11-07 18:07:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:38,143 INFO L480 AbstractCegarLoop]: Abstraction has 16329 states and 17739 transitions. [2018-11-07 18:07:38,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 18:07:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16329 states and 17739 transitions. [2018-11-07 18:07:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1058 [2018-11-07 18:07:38,166 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:38,167 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:38,167 INFO L423 AbstractCegarLoop]: === Iteration 18 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:38,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1156216731, now seen corresponding path program 1 times [2018-11-07 18:07:38,168 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:38,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:38,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:38,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:38,169 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1127 proven. 223 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-11-07 18:07:39,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:39,529 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:39,529 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1058 with the following transitions: [2018-11-07 18:07:39,529 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:39,532 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:39,532 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:39,719 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:40,624 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:40,624 INFO L272 AbstractInterpreter]: Visited 195 different actions 1178 times. Merged at 12 different actions 67 times. Widened at 1 different actions 2 times. Found 28 fixpoints after 6 different actions. Largest state had 24 variables. [2018-11-07 18:07:40,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:40,630 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:40,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:40,630 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:40,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:40,640 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:40,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1903 proven. 6 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2018-11-07 18:07:41,797 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 1127 proven. 296 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2018-11-07 18:07:43,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:43,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-07 18:07:43,050 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:43,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 18:07:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 18:07:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-07 18:07:43,052 INFO L87 Difference]: Start difference. First operand 16329 states and 17739 transitions. Second operand 9 states. [2018-11-07 18:07:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 18:07:46,210 INFO L93 Difference]: Finished difference Result 35063 states and 38594 transitions. [2018-11-07 18:07:46,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 18:07:46,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1057 [2018-11-07 18:07:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 18:07:46,254 INFO L225 Difference]: With dead ends: 35063 [2018-11-07 18:07:46,255 INFO L226 Difference]: Without dead ends: 20602 [2018-11-07 18:07:46,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2131 GetRequests, 2112 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-11-07 18:07:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20602 states. [2018-11-07 18:07:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20602 to 18491. [2018-11-07 18:07:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18491 states. [2018-11-07 18:07:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18491 states to 18491 states and 20275 transitions. [2018-11-07 18:07:46,607 INFO L78 Accepts]: Start accepts. Automaton has 18491 states and 20275 transitions. Word has length 1057 [2018-11-07 18:07:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 18:07:46,608 INFO L480 AbstractCegarLoop]: Abstraction has 18491 states and 20275 transitions. [2018-11-07 18:07:46,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 18:07:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18491 states and 20275 transitions. [2018-11-07 18:07:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2018-11-07 18:07:46,631 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 18:07:46,632 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 18:07:46,632 INFO L423 AbstractCegarLoop]: === Iteration 19 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 18:07:46,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:46,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1655208758, now seen corresponding path program 1 times [2018-11-07 18:07:46,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 18:07:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:46,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:46,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 18:07:46,634 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 18:07:46,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:47,834 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 18:07:48,325 WARN L179 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-11-07 18:07:48,788 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 18:07:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 846 proven. 860 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2018-11-07 18:07:50,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:50,547 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 18:07:50,547 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 1210 with the following transitions: [2018-11-07 18:07:50,548 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [5], [7], [10], [18], [26], [34], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [690], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [794], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [926], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 18:07:50,550 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 18:07:50,551 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 18:07:50,601 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 18:07:51,585 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 18:07:51,585 INFO L272 AbstractInterpreter]: Visited 196 different actions 1198 times. Merged at 13 different actions 81 times. Widened at 1 different actions 2 times. Found 31 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 18:07:51,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 18:07:51,591 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 18:07:51,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 18:07:51,591 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 18:07:51,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 18:07:51,601 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 18:07:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 18:07:51,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 18:07:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 1778 proven. 2 refuted. 0 times theorem prover too weak. 2306 trivial. 0 not checked. [2018-11-07 18:07:53,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 18:07:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4086 backedges. 855 proven. 112 refuted. 0 times theorem prover too weak. 3119 trivial. 0 not checked. [2018-11-07 18:07:54,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 18:07:54,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 19 [2018-11-07 18:07:54,756 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 18:07:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 18:07:54,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 18:07:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2018-11-07 18:07:54,759 INFO L87 Difference]: Start difference. First operand 18491 states and 20275 transitions. Second operand 17 states. Received shutdown request... [2018-11-07 18:07:56,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 18:07:56,134 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 18:07:56,141 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 18:07:56,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:07:56 BoogieIcfgContainer [2018-11-07 18:07:56,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 18:07:56,143 INFO L168 Benchmark]: Toolchain (without parser) took 209972.64 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.2 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-11-07 18:07:56,144 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:07:56,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 801.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:56,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 136.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -835.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:56,146 INFO L168 Benchmark]: Boogie Preprocessor took 116.88 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 18:07:56,146 INFO L168 Benchmark]: RCFGBuilder took 3518.94 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. [2018-11-07 18:07:56,147 INFO L168 Benchmark]: TraceAbstraction took 205393.51 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. [2018-11-07 18:07:56,151 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 801.94 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 136.47 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -835.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.88 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3518.94 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.9 MB). Peak memory consumption was 129.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205393.51 ms. Allocated memory was 2.3 GB in the beginning and 4.7 GB in the end (delta: 2.4 GB). Free memory was 2.1 GB in the beginning and 3.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 22]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 22). Cancelled while BasicCegarLoop was constructing difference of abstraction (18491states) and FLOYD_HOARE automaton (currently 8 states, 17 states before enhancement),while ReachableStatesComputation was computing reachable states (316 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 205.3s OverallTime, 19 OverallIterations, 10 TraceHistogramMax, 140.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3046 SDtfs, 37599 SDslu, 3530 SDs, 0 SdLazy, 44224 SolverSat, 5822 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57.4s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 15498 GetRequests, 15035 SyntacticMatches, 10 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 27.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18491occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.1s AbstIntTime, 14 AbstIntIterations, 6 AbstIntStrong, 0.9967672002810918 AbsIntWeakeningRatio, 0.10944625407166124 AbsIntAvgWeakeningVarsNumRemoved, 14.747882736156352 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 6290 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 25.3s InterpolantComputationTime, 16369 NumberOfCodeBlocks, 16369 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 23085 ConstructedInterpolants, 0 QuantifiedInterpolants, 64697721 SizeOfPredicates, 21 NumberOfNonLiveVariables, 9573 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 47316/52918 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown