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/Problem11_label44_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:12:20,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:12:20,156 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:12:20,168 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:12:20,168 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:12:20,169 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:12:20,170 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:12:20,172 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:12:20,174 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:12:20,175 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:12:20,176 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:12:20,176 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:12:20,177 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:12:20,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:12:20,179 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:12:20,180 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:12:20,181 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:12:20,183 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:12:20,185 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:12:20,187 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:12:20,188 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:12:20,192 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:12:20,197 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:12:20,198 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:12:20,198 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:12:20,201 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:12:20,204 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:12:20,205 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:12:20,206 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:12:20,207 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:12:20,207 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:12:20,208 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:12:20,209 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:12:20,210 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:12:20,211 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:12:20,212 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:12:20,212 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 20:12:20,243 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:12:20,243 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:12:20,244 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:12:20,244 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:12:20,244 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:12:20,244 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:12:20,248 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:12:20,248 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:12:20,249 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:12:20,249 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:12:20,249 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:12:20,249 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:12:20,249 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:12:20,250 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:12:20,250 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:12:20,251 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:12:20,251 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:12:20,251 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:12:20,251 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:12:20,251 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:12:20,252 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:12:20,252 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:12:20,252 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:12:20,252 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:12:20,252 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:12:20,253 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:12:20,253 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:12:20,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:12:20,253 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:12:20,253 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:12:20,254 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:12:20,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:12:20,254 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:12:20,254 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:12:20,254 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:12:20,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:12:20,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:12:20,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:12:20,320 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:12:20,320 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:12:20,321 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label44_true-unreach-call.c [2018-11-07 20:12:20,385 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a542de3b2/259d3645181e49dbbced721002f2f063/FLAGfb4b5ad75 [2018-11-07 20:12:21,025 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:12:21,030 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label44_true-unreach-call.c [2018-11-07 20:12:21,048 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a542de3b2/259d3645181e49dbbced721002f2f063/FLAGfb4b5ad75 [2018-11-07 20:12:21,066 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a542de3b2/259d3645181e49dbbced721002f2f063 [2018-11-07 20:12:21,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:12:21,081 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:12:21,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:12:21,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:12:21,086 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:12:21,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:21,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da72689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21, skipping insertion in model container [2018-11-07 20:12:21,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:21,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:12:21,186 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:12:21,783 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:12:21,788 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:12:21,957 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:12:21,976 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:12:21,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21 WrapperNode [2018-11-07 20:12:21,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:12:21,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:12:21,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:12:21,978 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:12:21,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:12:22,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:12:22,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:12:22,164 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:12:22,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (1/1) ... [2018-11-07 20:12:22,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:12:22,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:12:22,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:12:22,319 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:12:22,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (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 20:12:22,392 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:12:22,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:12:22,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:12:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:12:22,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:12:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:12:22,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:12:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:12:22,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:12:26,965 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:12:26,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:26 BoogieIcfgContainer [2018-11-07 20:12:26,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:12:26,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:12:26,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:12:26,970 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:12:26,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:12:21" (1/3) ... [2018-11-07 20:12:26,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6181eec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:26, skipping insertion in model container [2018-11-07 20:12:26,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:12:21" (2/3) ... [2018-11-07 20:12:26,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6181eec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:12:26, skipping insertion in model container [2018-11-07 20:12:26,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:12:26" (3/3) ... [2018-11-07 20:12:26,974 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label44_true-unreach-call.c [2018-11-07 20:12:26,984 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:12:26,993 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:12:27,011 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:12:27,051 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:12:27,051 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:12:27,051 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:12:27,051 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:12:27,051 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:12:27,052 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:12:27,052 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:12:27,052 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:12:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-07 20:12:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-07 20:12:27,090 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:27,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:12:27,094 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:27,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash -889068935, now seen corresponding path program 1 times [2018-11-07 20:12:27,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:27,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:27,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:27,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:27,152 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:27,578 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 20:12:27,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:12:27,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:12:27,585 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:12:27,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:12:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:12:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:12:27,613 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-07 20:12:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:12:30,919 INFO L93 Difference]: Finished difference Result 979 states and 1754 transitions. [2018-11-07 20:12:30,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:12:30,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-11-07 20:12:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:12:30,946 INFO L225 Difference]: With dead ends: 979 [2018-11-07 20:12:30,947 INFO L226 Difference]: Without dead ends: 680 [2018-11-07 20:12:30,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:12:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2018-11-07 20:12:31,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 484. [2018-11-07 20:12:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-11-07 20:12:31,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 730 transitions. [2018-11-07 20:12:31,044 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 730 transitions. Word has length 33 [2018-11-07 20:12:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:12:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 730 transitions. [2018-11-07 20:12:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:12:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 730 transitions. [2018-11-07 20:12:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-07 20:12:31,050 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:31,051 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:31,051 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:31,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash 337985131, now seen corresponding path program 1 times [2018-11-07 20:12:31,052 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:31,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:31,053 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:31,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:31,054 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:12:31,399 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:12:31,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:12:31,399 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:12:31,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:12:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:12:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:12:31,403 INFO L87 Difference]: Start difference. First operand 484 states and 730 transitions. Second operand 6 states. [2018-11-07 20:12:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:12:35,323 INFO L93 Difference]: Finished difference Result 1555 states and 2493 transitions. [2018-11-07 20:12:35,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:12:35,325 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2018-11-07 20:12:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:12:35,333 INFO L225 Difference]: With dead ends: 1555 [2018-11-07 20:12:35,333 INFO L226 Difference]: Without dead ends: 1077 [2018-11-07 20:12:35,336 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:12:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2018-11-07 20:12:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1063. [2018-11-07 20:12:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1063 states. [2018-11-07 20:12:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1592 transitions. [2018-11-07 20:12:35,408 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1592 transitions. Word has length 106 [2018-11-07 20:12:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:12:35,409 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 1592 transitions. [2018-11-07 20:12:35,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:12:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1592 transitions. [2018-11-07 20:12:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-11-07 20:12:35,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:35,414 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:35,419 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:35,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash 375100500, now seen corresponding path program 1 times [2018-11-07 20:12:35,420 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:35,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:35,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:35,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:35,422 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:36,080 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:12:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:12:36,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:12:36,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-07 20:12:36,216 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:12:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:12:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:12:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:12:36,217 INFO L87 Difference]: Start difference. First operand 1063 states and 1592 transitions. Second operand 7 states. [2018-11-07 20:12:38,999 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:12:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:12:44,476 INFO L93 Difference]: Finished difference Result 2975 states and 4517 transitions. [2018-11-07 20:12:44,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 20:12:44,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2018-11-07 20:12:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:12:44,491 INFO L225 Difference]: With dead ends: 2975 [2018-11-07 20:12:44,491 INFO L226 Difference]: Without dead ends: 1918 [2018-11-07 20:12:44,497 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-11-07 20:12:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2018-11-07 20:12:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1813. [2018-11-07 20:12:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1813 states. [2018-11-07 20:12:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2564 transitions. [2018-11-07 20:12:44,567 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2564 transitions. Word has length 107 [2018-11-07 20:12:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:12:44,567 INFO L480 AbstractCegarLoop]: Abstraction has 1813 states and 2564 transitions. [2018-11-07 20:12:44,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:12:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2564 transitions. [2018-11-07 20:12:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-07 20:12:44,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:12:44,571 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:44,572 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:12:44,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:44,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1471774269, now seen corresponding path program 1 times [2018-11-07 20:12:44,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:12:44,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:44,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:12:44,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:12:44,574 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:12:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:12:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:12:44,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:12:44,912 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:12:44,913 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 166 with the following transitions: [2018-11-07 20:12:44,915 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:12:44,972 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:12:44,972 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:12:45,723 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:12:46,939 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:12:46,941 INFO L272 AbstractInterpreter]: Visited 139 different actions 404 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:12:46,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:12:46,988 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:12:47,620 INFO L227 lantSequenceWeakener]: Weakened 162 states. On average, predicates are now at 73.33% of their original sizes. [2018-11-07 20:12:47,620 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:12:48,639 INFO L415 sIntCurrentIteration]: We unified 164 AI predicates to 164 [2018-11-07 20:12:48,640 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:12:48,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:12:48,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2018-11-07 20:12:48,641 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:12:48,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:12:48,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:12:48,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:12:48,642 INFO L87 Difference]: Start difference. First operand 1813 states and 2564 transitions. Second operand 13 states. [2018-11-07 20:13:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:20,788 INFO L93 Difference]: Finished difference Result 4396 states and 6117 transitions. [2018-11-07 20:13:20,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-07 20:13:20,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2018-11-07 20:13:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:20,801 INFO L225 Difference]: With dead ends: 4396 [2018-11-07 20:13:20,802 INFO L226 Difference]: Without dead ends: 2589 [2018-11-07 20:13:20,808 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 174 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:13:20,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2018-11-07 20:13:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2583. [2018-11-07 20:13:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2583 states. [2018-11-07 20:13:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 3379 transitions. [2018-11-07 20:13:20,878 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 3379 transitions. Word has length 165 [2018-11-07 20:13:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:20,879 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 3379 transitions. [2018-11-07 20:13:20,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:13:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 3379 transitions. [2018-11-07 20:13:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-11-07 20:13:20,888 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:20,889 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:20,889 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:20,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash -580003924, now seen corresponding path program 1 times [2018-11-07 20:13:20,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:20,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:20,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:20,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:20,894 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 20:13:21,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:21,210 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:21,210 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 225 with the following transitions: [2018-11-07 20:13:21,211 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:21,216 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:21,216 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:21,320 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:21,421 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:21,421 INFO L272 AbstractInterpreter]: Visited 125 different actions 244 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:13:21,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:21,427 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:21,736 INFO L227 lantSequenceWeakener]: Weakened 221 states. On average, predicates are now at 73.25% of their original sizes. [2018-11-07 20:13:21,736 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:21,952 INFO L415 sIntCurrentIteration]: We unified 223 AI predicates to 223 [2018-11-07 20:13:21,953 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:21,953 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:21,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2018-11-07 20:13:21,954 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:21,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-07 20:13:21,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-07 20:13:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-07 20:13:21,955 INFO L87 Difference]: Start difference. First operand 2583 states and 3379 transitions. Second operand 11 states. [2018-11-07 20:13:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:34,565 INFO L93 Difference]: Finished difference Result 4585 states and 6189 transitions. [2018-11-07 20:13:34,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:13:34,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 224 [2018-11-07 20:13:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:34,578 INFO L225 Difference]: With dead ends: 4585 [2018-11-07 20:13:34,578 INFO L226 Difference]: Without dead ends: 2778 [2018-11-07 20:13:34,585 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 232 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:13:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2018-11-07 20:13:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2775. [2018-11-07 20:13:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2775 states. [2018-11-07 20:13:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 3590 transitions. [2018-11-07 20:13:34,650 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 3590 transitions. Word has length 224 [2018-11-07 20:13:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:34,651 INFO L480 AbstractCegarLoop]: Abstraction has 2775 states and 3590 transitions. [2018-11-07 20:13:34,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-07 20:13:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 3590 transitions. [2018-11-07 20:13:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-11-07 20:13:34,655 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:34,655 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:34,656 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:34,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:34,656 INFO L82 PathProgramCache]: Analyzing trace with hash -478796448, now seen corresponding path program 1 times [2018-11-07 20:13:34,656 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:34,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:34,658 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-11-07 20:13:35,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:35,028 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:35,028 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 235 with the following transitions: [2018-11-07 20:13:35,028 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:35,036 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:35,036 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:35,180 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:35,463 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:35,463 INFO L272 AbstractInterpreter]: Visited 135 different actions 393 times. Merged at 5 different actions 10 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:13:35,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:35,469 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:35,726 INFO L227 lantSequenceWeakener]: Weakened 231 states. On average, predicates are now at 73.22% of their original sizes. [2018-11-07 20:13:35,726 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:35,825 INFO L415 sIntCurrentIteration]: We unified 233 AI predicates to 233 [2018-11-07 20:13:35,825 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:35,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:35,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2018-11-07 20:13:35,826 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:35,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:13:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:13:35,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:13:35,827 INFO L87 Difference]: Start difference. First operand 2775 states and 3590 transitions. Second operand 10 states. [2018-11-07 20:13:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:46,147 INFO L93 Difference]: Finished difference Result 4782 states and 6409 transitions. [2018-11-07 20:13:46,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:13:46,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 234 [2018-11-07 20:13:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:46,160 INFO L225 Difference]: With dead ends: 4782 [2018-11-07 20:13:46,160 INFO L226 Difference]: Without dead ends: 2975 [2018-11-07 20:13:46,166 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 240 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:13:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2018-11-07 20:13:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2969. [2018-11-07 20:13:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2969 states. [2018-11-07 20:13:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 3822 transitions. [2018-11-07 20:13:46,234 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 3822 transitions. Word has length 234 [2018-11-07 20:13:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:46,235 INFO L480 AbstractCegarLoop]: Abstraction has 2969 states and 3822 transitions. [2018-11-07 20:13:46,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:13:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 3822 transitions. [2018-11-07 20:13:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-07 20:13:46,239 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:46,240 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:46,240 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:46,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1826463509, now seen corresponding path program 1 times [2018-11-07 20:13:46,241 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:46,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:46,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:46,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:46,242 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-07 20:13:46,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:13:46,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:13:46,514 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:46,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:13:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:13:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:13:46,515 INFO L87 Difference]: Start difference. First operand 2969 states and 3822 transitions. Second operand 4 states. [2018-11-07 20:13:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:13:48,673 INFO L93 Difference]: Finished difference Result 6502 states and 8980 transitions. [2018-11-07 20:13:48,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:13:48,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2018-11-07 20:13:48,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:13:48,694 INFO L225 Difference]: With dead ends: 6502 [2018-11-07 20:13:48,695 INFO L226 Difference]: Without dead ends: 4118 [2018-11-07 20:13:48,706 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:13:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2018-11-07 20:13:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 3907. [2018-11-07 20:13:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3907 states. [2018-11-07 20:13:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 5251 transitions. [2018-11-07 20:13:48,807 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 5251 transitions. Word has length 235 [2018-11-07 20:13:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:13:48,807 INFO L480 AbstractCegarLoop]: Abstraction has 3907 states and 5251 transitions. [2018-11-07 20:13:48,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:13:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 5251 transitions. [2018-11-07 20:13:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-11-07 20:13:48,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:13:48,814 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:13:48,814 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:13:48,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:48,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1434097389, now seen corresponding path program 1 times [2018-11-07 20:13:48,814 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:13:48,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:48,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:13:48,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:13:48,816 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:13:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:13:49,143 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-07 20:13:49,398 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-11-07 20:13:49,648 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-11-07 20:13:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:13:50,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:13:50,133 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:13:50,133 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 256 with the following transitions: [2018-11-07 20:13:50,134 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:13:50,138 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:13:50,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:13:50,245 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:13:50,665 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:13:50,666 INFO L272 AbstractInterpreter]: Visited 156 different actions 455 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-07 20:13:50,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:13:50,675 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:13:51,580 INFO L227 lantSequenceWeakener]: Weakened 41 states. On average, predicates are now at 75.28% of their original sizes. [2018-11-07 20:13:51,580 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:13:51,982 INFO L415 sIntCurrentIteration]: We unified 254 AI predicates to 254 [2018-11-07 20:13:51,982 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:13:51,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:13:51,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 20:13:51,982 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:13:51,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:13:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:13:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:13:51,984 INFO L87 Difference]: Start difference. First operand 3907 states and 5251 transitions. Second operand 21 states. [2018-11-07 20:14:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:13,571 INFO L93 Difference]: Finished difference Result 8022 states and 10953 transitions. [2018-11-07 20:14:13,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 20:14:13,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 255 [2018-11-07 20:14:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:13,589 INFO L225 Difference]: With dead ends: 8022 [2018-11-07 20:14:13,590 INFO L226 Difference]: Without dead ends: 4892 [2018-11-07 20:14:13,598 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2018-11-07 20:14:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2018-11-07 20:14:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4873. [2018-11-07 20:14:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4873 states. [2018-11-07 20:14:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 6356 transitions. [2018-11-07 20:14:13,703 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 6356 transitions. Word has length 255 [2018-11-07 20:14:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:13,703 INFO L480 AbstractCegarLoop]: Abstraction has 4873 states and 6356 transitions. [2018-11-07 20:14:13,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:14:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 6356 transitions. [2018-11-07 20:14:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-11-07 20:14:13,711 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:13,711 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:14:13,712 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:13,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2081573900, now seen corresponding path program 1 times [2018-11-07 20:14:13,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:13,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:13,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:13,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:13,713 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 20:14:14,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:14,632 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:14,632 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 279 with the following transitions: [2018-11-07 20:14:14,633 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [986], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:14,637 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:14,637 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:14,853 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:15,495 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:14:15,495 INFO L272 AbstractInterpreter]: Visited 181 different actions 718 times. Merged at 7 different actions 29 times. Widened at 1 different actions 1 times. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:15,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:15,503 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:14:15,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:15,503 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 20:14:15,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:15,515 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:14:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:14:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 20:14:19,647 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:14:19,909 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 20:14:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-11-07 20:14:20,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-07 20:14:20,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 9 [2018-11-07 20:14:20,316 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:20,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:14:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:14:20,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2018-11-07 20:14:20,317 INFO L87 Difference]: Start difference. First operand 4873 states and 6356 transitions. Second operand 3 states. [2018-11-07 20:14:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:22,368 INFO L93 Difference]: Finished difference Result 10938 states and 15183 transitions. [2018-11-07 20:14:22,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:14:22,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 278 [2018-11-07 20:14:22,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:22,400 INFO L225 Difference]: With dead ends: 10938 [2018-11-07 20:14:22,400 INFO L226 Difference]: Without dead ends: 6848 [2018-11-07 20:14:22,426 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 555 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2018-11-07 20:14:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2018-11-07 20:14:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6135. [2018-11-07 20:14:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6135 states. [2018-11-07 20:14:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6135 states to 6135 states and 8006 transitions. [2018-11-07 20:14:22,598 INFO L78 Accepts]: Start accepts. Automaton has 6135 states and 8006 transitions. Word has length 278 [2018-11-07 20:14:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:22,599 INFO L480 AbstractCegarLoop]: Abstraction has 6135 states and 8006 transitions. [2018-11-07 20:14:22,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:14:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6135 states and 8006 transitions. [2018-11-07 20:14:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-11-07 20:14:22,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:22,613 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:22,613 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:22,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1536461622, now seen corresponding path program 1 times [2018-11-07 20:14:22,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:22,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:22,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:22,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:22,615 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:24,400 WARN L179 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 6 [2018-11-07 20:14:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 219 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-07 20:14:24,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:24,914 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:24,914 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 322 with the following transitions: [2018-11-07 20:14:24,915 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:24,917 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:24,918 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:25,083 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:26,066 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:14:26,066 INFO L272 AbstractInterpreter]: Visited 137 different actions 679 times. Merged at 8 different actions 41 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:26,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:26,072 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:14:26,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:26,072 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 20:14:26,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:26,083 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:14:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:26,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:14:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 20:14:26,477 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:14:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-07 20:14:27,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:14:27,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2018-11-07 20:14:27,637 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:14:27,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 20:14:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 20:14:27,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:14:27,639 INFO L87 Difference]: Start difference. First operand 6135 states and 8006 transitions. Second operand 16 states. [2018-11-07 20:14:29,928 WARN L179 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-11-07 20:14:40,028 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-11-07 20:14:45,178 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2018-11-07 20:14:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:14:50,418 INFO L93 Difference]: Finished difference Result 20998 states and 37801 transitions. [2018-11-07 20:14:50,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-11-07 20:14:50,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 321 [2018-11-07 20:14:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:14:50,545 INFO L225 Difference]: With dead ends: 20998 [2018-11-07 20:14:50,545 INFO L226 Difference]: Without dead ends: 16409 [2018-11-07 20:14:50,612 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 717 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4405 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1841, Invalid=9501, Unknown=0, NotChecked=0, Total=11342 [2018-11-07 20:14:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16409 states. [2018-11-07 20:14:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16409 to 14791. [2018-11-07 20:14:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14791 states. [2018-11-07 20:14:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14791 states to 14791 states and 21317 transitions. [2018-11-07 20:14:51,235 INFO L78 Accepts]: Start accepts. Automaton has 14791 states and 21317 transitions. Word has length 321 [2018-11-07 20:14:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:14:51,236 INFO L480 AbstractCegarLoop]: Abstraction has 14791 states and 21317 transitions. [2018-11-07 20:14:51,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 20:14:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 14791 states and 21317 transitions. [2018-11-07 20:14:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-11-07 20:14:51,257 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:14:51,257 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 20:14:51,258 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:14:51,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 538927081, now seen corresponding path program 1 times [2018-11-07 20:14:51,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:14:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:51,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:14:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:14:51,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:14:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:14:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 256 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-07 20:14:52,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:14:52,059 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:14:52,060 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 333 with the following transitions: [2018-11-07 20:14:52,060 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [599], [602], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:14:52,063 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:14:52,064 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:14:52,172 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:14:52,742 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:14:52,742 INFO L272 AbstractInterpreter]: Visited 126 different actions 497 times. Merged at 7 different actions 26 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:14:52,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:14:52,760 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:14:53,224 INFO L227 lantSequenceWeakener]: Weakened 329 states. On average, predicates are now at 75.13% of their original sizes. [2018-11-07 20:14:53,224 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:14:53,347 INFO L415 sIntCurrentIteration]: We unified 331 AI predicates to 331 [2018-11-07 20:14:53,347 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:14:53,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:14:53,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2018-11-07 20:14:53,348 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:14:53,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 20:14:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 20:14:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 20:14:53,349 INFO L87 Difference]: Start difference. First operand 14791 states and 21317 transitions. Second operand 10 states. [2018-11-07 20:15:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:15:06,106 INFO L93 Difference]: Finished difference Result 28998 states and 42086 transitions. [2018-11-07 20:15:06,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 20:15:06,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 332 [2018-11-07 20:15:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:15:06,165 INFO L225 Difference]: With dead ends: 28998 [2018-11-07 20:15:06,165 INFO L226 Difference]: Without dead ends: 15947 [2018-11-07 20:15:06,198 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 338 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2018-11-07 20:15:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15947 states. [2018-11-07 20:15:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15947 to 15754. [2018-11-07 20:15:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15754 states. [2018-11-07 20:15:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15754 states to 15754 states and 22406 transitions. [2018-11-07 20:15:06,559 INFO L78 Accepts]: Start accepts. Automaton has 15754 states and 22406 transitions. Word has length 332 [2018-11-07 20:15:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:15:06,560 INFO L480 AbstractCegarLoop]: Abstraction has 15754 states and 22406 transitions. [2018-11-07 20:15:06,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 20:15:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15754 states and 22406 transitions. [2018-11-07 20:15:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-11-07 20:15:06,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:15:06,595 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:15:06,595 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:15:06,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:06,595 INFO L82 PathProgramCache]: Analyzing trace with hash -29878952, now seen corresponding path program 1 times [2018-11-07 20:15:06,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:15:06,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:06,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:06,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:06,598 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:15:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-11-07 20:15:07,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:07,256 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:15:07,256 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 355 with the following transitions: [2018-11-07 20:15:07,257 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [582], [583], [587], [591], [595], [599], [602], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:15:07,259 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:15:07,259 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:15:07,382 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:09,020 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:15:09,021 INFO L272 AbstractInterpreter]: Visited 141 different actions 828 times. Merged at 7 different actions 37 times. Widened at 1 different actions 1 times. Found 6 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-07 20:15:09,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:09,057 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:15:10,205 INFO L227 lantSequenceWeakener]: Weakened 351 states. On average, predicates are now at 73.25% of their original sizes. [2018-11-07 20:15:10,206 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:15:10,348 INFO L415 sIntCurrentIteration]: We unified 353 AI predicates to 353 [2018-11-07 20:15:10,348 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:15:10,348 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:15:10,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [6] total 17 [2018-11-07 20:15:10,349 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:15:10,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:15:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:15:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-07 20:15:10,350 INFO L87 Difference]: Start difference. First operand 15754 states and 22406 transitions. Second operand 13 states. [2018-11-07 20:15:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:15:41,168 INFO L93 Difference]: Finished difference Result 31852 states and 45947 transitions. [2018-11-07 20:15:41,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:15:41,168 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 354 [2018-11-07 20:15:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:15:41,222 INFO L225 Difference]: With dead ends: 31852 [2018-11-07 20:15:41,222 INFO L226 Difference]: Without dead ends: 18801 [2018-11-07 20:15:41,257 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 372 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2018-11-07 20:15:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2018-11-07 20:15:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 18196. [2018-11-07 20:15:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18196 states. [2018-11-07 20:15:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18196 states to 18196 states and 25648 transitions. [2018-11-07 20:15:41,662 INFO L78 Accepts]: Start accepts. Automaton has 18196 states and 25648 transitions. Word has length 354 [2018-11-07 20:15:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:15:41,663 INFO L480 AbstractCegarLoop]: Abstraction has 18196 states and 25648 transitions. [2018-11-07 20:15:41,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 20:15:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 18196 states and 25648 transitions. [2018-11-07 20:15:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-11-07 20:15:41,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:15:41,694 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:15:41,694 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:15:41,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:41,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1423439856, now seen corresponding path program 1 times [2018-11-07 20:15:41,695 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:15:41,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:41,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:41,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:15:41,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:15:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 272 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:15:42,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:42,401 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:15:42,401 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 356 with the following transitions: [2018-11-07 20:15:42,401 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [165], [167], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [780], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-07 20:15:42,404 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:15:42,404 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:15:42,477 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:15:43,749 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 20:15:43,749 INFO L272 AbstractInterpreter]: Visited 141 different actions 558 times. Merged at 8 different actions 30 times. Never widened. Found 6 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-07 20:15:43,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:15:43,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 20:15:43,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:15:43,754 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 20:15:43,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:15:43,765 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 20:15:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:15:43,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 20:15:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 20:15:44,078 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 20:15:44,258 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2018-11-07 20:15:44,530 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-11-07 20:15:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 227 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-11-07 20:15:44,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 20:15:44,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2018-11-07 20:15:44,854 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 20:15:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 20:15:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 20:15:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-11-07 20:15:44,856 INFO L87 Difference]: Start difference. First operand 18196 states and 25648 transitions. Second operand 13 states. Received shutdown request... [2018-11-07 20:15:51,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-07 20:15:51,617 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:15:51,622 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:15:51,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:15:51 BoogieIcfgContainer [2018-11-07 20:15:51,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:15:51,623 INFO L168 Benchmark]: Toolchain (without parser) took 210543.38 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 281.6 MB). Peak memory consumption was 3.0 GB. Max. memory is 7.1 GB. [2018-11-07 20:15:51,624 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:15:51,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 895.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2018-11-07 20:15:51,625 INFO L168 Benchmark]: Boogie Procedure Inliner took 185.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -840.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2018-11-07 20:15:51,626 INFO L168 Benchmark]: Boogie Preprocessor took 154.79 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 20:15:51,627 INFO L168 Benchmark]: RCFGBuilder took 4647.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 194.7 MB). Peak memory consumption was 194.7 MB. Max. memory is 7.1 GB. [2018-11-07 20:15:51,627 INFO L168 Benchmark]: TraceAbstraction took 204655.29 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 2.0 GB). Free memory was 2.0 GB in the beginning and 1.1 GB in the end (delta: 874.4 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2018-11-07 20:15:51,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 895.36 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 52.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 185.89 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -840.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 154.79 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 4647.11 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 194.7 MB). Peak memory consumption was 194.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 204655.29 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 2.0 GB). Free memory was 2.0 GB in the beginning and 1.1 GB in the end (delta: 874.4 MB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 84). Cancelled while BasicCegarLoop was constructing difference of abstraction (18196states) and FLOYD_HOARE automaton (currently 29 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (13466 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 204.5s OverallTime, 13 OverallIterations, 4 TraceHistogramMax, 170.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3179 SDtfs, 22385 SDslu, 5779 SDs, 0 SdLazy, 40336 SolverSat, 6063 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 75.7s Time, PredicateUnifierStatistics: 12 DeclaredPredicates, 3827 GetRequests, 3506 SyntacticMatches, 11 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5547 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18196occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 9.1s AbstIntTime, 9 AbstIntIterations, 6 AbstIntStrong, 0.9973895444918787 AbsIntWeakeningRatio, 0.11296534017971759 AbsIntAvgWeakeningVarsNumRemoved, 23.006418485237482 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 3689 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.9s InterpolantComputationTime, 3953 NumberOfCodeBlocks, 3953 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 4888 ConstructedInterpolants, 9 QuantifiedInterpolants, 7483585 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1657 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 2950/3640 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown