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-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43_false-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 06:25:14,285 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 06:25:14,288 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 06:25:14,300 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 06:25:14,301 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 06:25:14,302 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 06:25:14,303 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 06:25:14,305 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 06:25:14,306 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 06:25:14,308 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 06:25:14,311 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 06:25:14,311 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 06:25:14,312 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 06:25:14,313 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 06:25:14,314 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 06:25:14,316 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 06:25:14,316 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 06:25:14,318 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 06:25:14,329 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 06:25:14,333 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 06:25:14,333 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 06:25:14,336 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 06:25:14,339 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 06:25:14,339 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 06:25:14,339 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 06:25:14,341 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 06:25:14,342 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 06:25:14,345 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 06:25:14,345 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 06:25:14,347 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 06:25:14,347 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 06:25:14,347 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 06:25:14,348 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 06:25:14,348 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 06:25:14,349 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 06:25:14,349 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 06:25:14,350 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-11-07 06:25:14,375 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 06:25:14,375 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 06:25:14,376 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 06:25:14,376 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 06:25:14,377 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 06:25:14,377 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 06:25:14,377 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-07 06:25:14,377 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 06:25:14,377 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 06:25:14,377 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 06:25:14,378 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 06:25:14,378 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 06:25:14,378 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 06:25:14,378 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-07 06:25:14,379 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 06:25:14,379 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 06:25:14,379 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 06:25:14,379 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 06:25:14,380 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 06:25:14,380 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 06:25:14,380 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 06:25:14,380 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 06:25:14,381 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 06:25:14,381 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 06:25:14,381 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 06:25:14,381 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 06:25:14,381 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 06:25:14,382 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 06:25:14,382 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 06:25:14,382 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 06:25:14,382 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 06:25:14,382 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 06:25:14,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 06:25:14,383 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 06:25:14,383 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 06:25:14,383 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 06:25:14,428 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 06:25:14,447 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 06:25:14,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 06:25:14,453 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 06:25:14,453 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 06:25:14,454 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 06:25:14,538 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914283a90/ca7615188a514febb0c9a4a718916911/FLAG4cff9f0c6 [2018-11-07 06:25:15,198 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 06:25:15,199 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 06:25:15,221 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914283a90/ca7615188a514febb0c9a4a718916911/FLAG4cff9f0c6 [2018-11-07 06:25:15,241 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914283a90/ca7615188a514febb0c9a4a718916911 [2018-11-07 06:25:15,254 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 06:25:15,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 06:25:15,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 06:25:15,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 06:25:15,263 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 06:25:15,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:25:15" (1/1) ... [2018-11-07 06:25:15,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30738b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:15, skipping insertion in model container [2018-11-07 06:25:15,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:25:15" (1/1) ... [2018-11-07 06:25:15,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 06:25:15,359 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 06:25:15,932 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:25:15,938 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 06:25:16,129 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 06:25:16,167 INFO L193 MainTranslator]: Completed translation [2018-11-07 06:25:16,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16 WrapperNode [2018-11-07 06:25:16,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 06:25:16,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 06:25:16,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 06:25:16,173 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 06:25:16,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 06:25:16,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 06:25:16,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 06:25:16,346 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 06:25:16,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (1/1) ... [2018-11-07 06:25:16,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 06:25:16,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 06:25:16,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 06:25:16,478 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 06:25:16,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (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 06:25:16,563 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 06:25:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 06:25:16,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 06:25:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 06:25:16,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 06:25:16,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 06:25:16,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 06:25:16,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 06:25:16,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 06:25:20,235 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 06:25:20,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:25:20 BoogieIcfgContainer [2018-11-07 06:25:20,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 06:25:20,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 06:25:20,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 06:25:20,241 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 06:25:20,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:25:15" (1/3) ... [2018-11-07 06:25:20,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1524c876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:25:20, skipping insertion in model container [2018-11-07 06:25:20,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:25:16" (2/3) ... [2018-11-07 06:25:20,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1524c876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:25:20, skipping insertion in model container [2018-11-07 06:25:20,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:25:20" (3/3) ... [2018-11-07 06:25:20,245 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label43_false-unreach-call_false-termination.c [2018-11-07 06:25:20,256 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 06:25:20,266 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 06:25:20,281 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 06:25:20,326 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 06:25:20,326 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 06:25:20,326 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 06:25:20,326 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 06:25:20,326 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 06:25:20,327 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 06:25:20,327 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 06:25:20,327 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 06:25:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 06:25:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-07 06:25:20,369 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:25:20,371 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] [2018-11-07 06:25:20,373 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:25:20,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:20,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1620735268, now seen corresponding path program 1 times [2018-11-07 06:25:20,381 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:25:20,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:20,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:20,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:20,435 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:25:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:20,832 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 06:25:20,902 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 06:25:20,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:25:20,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 06:25:20,905 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:25:20,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 06:25:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 06:25:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:25:20,933 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 06:25:22,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:25:22,645 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 06:25:22,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 06:25:22,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-11-07 06:25:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:25:22,668 INFO L225 Difference]: With dead ends: 691 [2018-11-07 06:25:22,669 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 06:25:22,678 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 06:25:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 06:25:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 06:25:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 06:25:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 06:25:22,786 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 22 [2018-11-07 06:25:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:25:22,787 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 06:25:22,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 06:25:22,787 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 06:25:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-07 06:25:22,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:25:22,795 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:25:22,796 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:25:22,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1438641935, now seen corresponding path program 1 times [2018-11-07 06:25:22,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:25:22,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:22,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:22,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:22,798 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:25:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:25:23,158 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:25:23,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 06:25:23,159 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:25:23,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:25:23,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:25:23,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:25:23,162 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 06:25:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:25:25,330 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 06:25:25,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 06:25:25,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2018-11-07 06:25:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:25:25,338 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 06:25:25,338 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 06:25:25,341 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 06:25:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 06:25:25,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 06:25:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 06:25:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 06:25:25,381 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 109 [2018-11-07 06:25:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:25:25,382 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 06:25:25,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:25:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 06:25:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-07 06:25:25,388 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:25:25,388 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-07 06:25:25,389 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:25:25,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1680025772, now seen corresponding path program 1 times [2018-11-07 06:25:25,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:25:25,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:25,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:25,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:25,391 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:25:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:25:25,581 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 06:25:25,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 06:25:25,582 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:25:25,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 06:25:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 06:25:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:25:25,583 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 06:25:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:25:29,540 INFO L93 Difference]: Finished difference Result 2350 states and 4002 transitions. [2018-11-07 06:25:29,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 06:25:29,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-11-07 06:25:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:25:29,559 INFO L225 Difference]: With dead ends: 2350 [2018-11-07 06:25:29,559 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 06:25:29,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 06:25:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 06:25:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 06:25:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 06:25:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2678 transitions. [2018-11-07 06:25:29,652 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2678 transitions. Word has length 118 [2018-11-07 06:25:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:25:29,656 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2678 transitions. [2018-11-07 06:25:29,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 06:25:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2678 transitions. [2018-11-07 06:25:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-11-07 06:25:29,676 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:25:29,676 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:25:29,676 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:25:29,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1765816872, now seen corresponding path program 1 times [2018-11-07 06:25:29,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:25:29,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:29,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:29,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:29,679 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:25:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:30,369 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-11-07 06:25:30,679 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-11-07 06:25:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 06:25:31,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:25:31,004 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:25:31,006 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 223 with the following transitions: [2018-11-07 06:25:31,008 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:25:31,063 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:25:31,064 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:25:35,949 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:25:35,951 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 06:25:35,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:35,996 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:25:39,632 INFO L227 lantSequenceWeakener]: Weakened 213 states. On average, predicates are now at 77.4% of their original sizes. [2018-11-07 06:25:39,632 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:25:39,732 INFO L415 sIntCurrentIteration]: We unified 221 AI predicates to 221 [2018-11-07 06:25:39,732 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:25:39,733 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:25:39,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2018-11-07 06:25:39,733 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:25:39,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 06:25:39,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 06:25:39,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 06:25:39,735 INFO L87 Difference]: Start difference. First operand 1731 states and 2678 transitions. Second operand 6 states. [2018-11-07 06:25:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:25:51,450 INFO L93 Difference]: Finished difference Result 3641 states and 5641 transitions. [2018-11-07 06:25:51,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 06:25:51,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 222 [2018-11-07 06:25:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:25:51,468 INFO L225 Difference]: With dead ends: 3641 [2018-11-07 06:25:51,468 INFO L226 Difference]: Without dead ends: 1916 [2018-11-07 06:25:51,478 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 222 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-07 06:25:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-07 06:25:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-07 06:25:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 06:25:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2869 transitions. [2018-11-07 06:25:51,545 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2869 transitions. Word has length 222 [2018-11-07 06:25:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:25:51,546 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2869 transitions. [2018-11-07 06:25:51,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 06:25:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2869 transitions. [2018-11-07 06:25:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-11-07 06:25:51,557 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:25:51,558 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-11-07 06:25:51,559 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:25:51,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash -709448537, now seen corresponding path program 1 times [2018-11-07 06:25:51,560 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:25:51,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:51,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:51,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:25:51,563 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:25:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 133 proven. 164 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 06:25:52,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:25:52,621 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:25:52,622 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 308 with the following transitions: [2018-11-07 06:25:52,622 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:25:52,628 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:25:52,628 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:25:56,879 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:25:56,879 INFO L272 AbstractInterpreter]: Visited 123 different actions 238 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:25:56,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:25:56,890 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:25:56,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:25:56,890 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 06:25:56,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:25:56,901 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:25:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:25:57,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:25:57,470 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:25:57,850 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:25:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 233 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-11-07 06:25:58,159 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:25:58,330 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 06:25:58,455 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 06:25:58,782 WARN L179 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-11-07 06:25:59,034 WARN L179 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 06:26:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 55 proven. 242 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 06:26:00,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:26:00,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2018-11-07 06:26:00,118 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:26:00,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-07 06:26:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-07 06:26:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2018-11-07 06:26:00,121 INFO L87 Difference]: Start difference. First operand 1914 states and 2869 transitions. Second operand 15 states. [2018-11-07 06:26:01,926 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2018-11-07 06:26:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:26:06,339 INFO L93 Difference]: Finished difference Result 4928 states and 7455 transitions. [2018-11-07 06:26:06,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-07 06:26:06,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 307 [2018-11-07 06:26:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:26:06,361 INFO L225 Difference]: With dead ends: 4928 [2018-11-07 06:26:06,361 INFO L226 Difference]: Without dead ends: 3004 [2018-11-07 06:26:06,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 620 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2018-11-07 06:26:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2018-11-07 06:26:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2777. [2018-11-07 06:26:06,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2777 states. [2018-11-07 06:26:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3731 transitions. [2018-11-07 06:26:06,464 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3731 transitions. Word has length 307 [2018-11-07 06:26:06,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:26:06,465 INFO L480 AbstractCegarLoop]: Abstraction has 2777 states and 3731 transitions. [2018-11-07 06:26:06,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-07 06:26:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3731 transitions. [2018-11-07 06:26:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-07 06:26:06,475 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:26:06,475 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:26:06,476 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:26:06,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:26:06,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2029899283, now seen corresponding path program 1 times [2018-11-07 06:26:06,476 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:26:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:26:06,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:26:06,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:26:06,478 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:26:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:26:06,997 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:26:07,203 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 06:26:07,441 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 06:26:07,844 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-07 06:26:08,331 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-11-07 06:26:08,638 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-07 06:26:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 58 proven. 267 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 06:26:09,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:26:09,153 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:26:09,153 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-07 06:26:09,153 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:26:09,158 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:26:09,158 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:26:13,120 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:26:13,120 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 06:26:13,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:26:13,128 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:26:15,243 INFO L227 lantSequenceWeakener]: Weakened 330 states. On average, predicates are now at 77.43% of their original sizes. [2018-11-07 06:26:15,243 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:26:15,662 INFO L415 sIntCurrentIteration]: We unified 332 AI predicates to 332 [2018-11-07 06:26:15,662 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:26:15,662 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:26:15,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2018-11-07 06:26:15,663 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:26:15,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 06:26:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 06:26:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-11-07 06:26:15,664 INFO L87 Difference]: Start difference. First operand 2777 states and 3731 transitions. Second operand 10 states. [2018-11-07 06:26:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:26:34,702 INFO L93 Difference]: Finished difference Result 4992 states and 6861 transitions. [2018-11-07 06:26:34,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-07 06:26:34,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 333 [2018-11-07 06:26:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:26:34,715 INFO L225 Difference]: With dead ends: 4992 [2018-11-07 06:26:34,715 INFO L226 Difference]: Without dead ends: 2404 [2018-11-07 06:26:34,726 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 340 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-11-07 06:26:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2018-11-07 06:26:34,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2399. [2018-11-07 06:26:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2018-11-07 06:26:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3281 transitions. [2018-11-07 06:26:34,783 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3281 transitions. Word has length 333 [2018-11-07 06:26:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:26:34,784 INFO L480 AbstractCegarLoop]: Abstraction has 2399 states and 3281 transitions. [2018-11-07 06:26:34,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 06:26:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3281 transitions. [2018-11-07 06:26:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-11-07 06:26:34,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:26:34,796 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:26:34,796 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:26:34,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:26:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 489201031, now seen corresponding path program 1 times [2018-11-07 06:26:34,797 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:26:34,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:26:34,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:26:34,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:26:34,798 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:26:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:26:35,870 WARN L179 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-11-07 06:26:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 325 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 06:26:36,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:26:36,312 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:26:36,313 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 444 with the following transitions: [2018-11-07 06:26:36,313 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:26:36,317 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:26:36,317 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:26:44,747 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 06:26:44,747 INFO L272 AbstractInterpreter]: Visited 123 different actions 368 times. Merged at 7 different actions 21 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 06:26:44,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:26:44,755 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 06:26:45,973 INFO L227 lantSequenceWeakener]: Weakened 440 states. On average, predicates are now at 80.08% of their original sizes. [2018-11-07 06:26:45,973 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 06:26:46,043 INFO L415 sIntCurrentIteration]: We unified 442 AI predicates to 442 [2018-11-07 06:26:46,043 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 06:26:46,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 06:26:46,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-11-07 06:26:46,044 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 06:26:46,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 06:26:46,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 06:26:46,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:26:46,045 INFO L87 Difference]: Start difference. First operand 2399 states and 3281 transitions. Second operand 9 states. [2018-11-07 06:27:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:27:14,258 INFO L93 Difference]: Finished difference Result 5158 states and 7284 transitions. [2018-11-07 06:27:14,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 06:27:14,259 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 443 [2018-11-07 06:27:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:27:14,277 INFO L225 Difference]: With dead ends: 5158 [2018-11-07 06:27:14,277 INFO L226 Difference]: Without dead ends: 3133 [2018-11-07 06:27:14,290 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 449 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2018-11-07 06:27:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2018-11-07 06:27:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2914. [2018-11-07 06:27:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2914 states. [2018-11-07 06:27:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 3884 transitions. [2018-11-07 06:27:14,370 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 3884 transitions. Word has length 443 [2018-11-07 06:27:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:27:14,371 INFO L480 AbstractCegarLoop]: Abstraction has 2914 states and 3884 transitions. [2018-11-07 06:27:14,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 06:27:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 3884 transitions. [2018-11-07 06:27:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-11-07 06:27:14,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:27:14,387 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:27:14,388 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:27:14,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:27:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1479683768, now seen corresponding path program 1 times [2018-11-07 06:27:14,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:27:14,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:14,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:27:14,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:14,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:27:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:27:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 294 proven. 273 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-07 06:27:15,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:27:15,789 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:27:15,790 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 511 with the following transitions: [2018-11-07 06:27:15,790 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:27:15,796 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:27:15,796 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:27:21,198 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:27:21,199 INFO L272 AbstractInterpreter]: Visited 191 different actions 763 times. Merged at 9 different actions 35 times. Widened at 1 different actions 1 times. Found 7 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 06:27:21,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:27:21,207 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:27:21,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:27:21,207 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 06:27:21,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:27:21,219 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:27:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:27:21,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:27:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 527 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2018-11-07 06:27:21,730 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:27:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 292 proven. 86 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2018-11-07 06:27:22,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:27:22,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 20 [2018-11-07 06:27:22,324 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:27:22,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 06:27:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 06:27:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2018-11-07 06:27:22,326 INFO L87 Difference]: Start difference. First operand 2914 states and 3884 transitions. Second operand 17 states. [2018-11-07 06:27:23,087 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-11-07 06:27:25,300 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-11-07 06:27:25,762 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2018-11-07 06:27:26,731 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-11-07 06:27:27,567 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-11-07 06:27:29,723 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-11-07 06:27:30,391 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-11-07 06:27:31,885 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2018-11-07 06:27:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:27:33,022 INFO L93 Difference]: Finished difference Result 7714 states and 11226 transitions. [2018-11-07 06:27:33,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-07 06:27:33,023 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 510 [2018-11-07 06:27:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:27:33,054 INFO L225 Difference]: With dead ends: 7714 [2018-11-07 06:27:33,054 INFO L226 Difference]: Without dead ends: 5174 [2018-11-07 06:27:33,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=916, Invalid=3506, Unknown=0, NotChecked=0, Total=4422 [2018-11-07 06:27:33,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2018-11-07 06:27:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 5056. [2018-11-07 06:27:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5056 states. [2018-11-07 06:27:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 6539 transitions. [2018-11-07 06:27:33,215 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 6539 transitions. Word has length 510 [2018-11-07 06:27:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:27:33,216 INFO L480 AbstractCegarLoop]: Abstraction has 5056 states and 6539 transitions. [2018-11-07 06:27:33,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 06:27:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 6539 transitions. [2018-11-07 06:27:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2018-11-07 06:27:33,237 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:27:33,238 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:27:33,238 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:27:33,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:27:33,238 INFO L82 PathProgramCache]: Analyzing trace with hash 679395416, now seen corresponding path program 1 times [2018-11-07 06:27:33,239 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:27:33,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:33,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:27:33,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:33,240 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:27:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:27:33,769 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 06:27:33,963 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 06:27:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 406 proven. 433 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2018-11-07 06:27:34,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:27:34,785 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:27:34,785 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 529 with the following transitions: [2018-11-07 06:27:34,786 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:27:34,788 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:27:34,789 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:27:49,173 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:27:49,174 INFO L272 AbstractInterpreter]: Visited 125 different actions 504 times. Merged at 10 different actions 38 times. Never widened. Found 10 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 06:27:49,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:27:49,182 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:27:49,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:27:49,182 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 06:27:49,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:27:49,194 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:27:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:27:49,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:27:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2018-11-07 06:27:49,845 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:27:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 400 proven. 86 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2018-11-07 06:27:50,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:27:50,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 14 [2018-11-07 06:27:50,475 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:27:50,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-07 06:27:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-07 06:27:50,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-07 06:27:50,477 INFO L87 Difference]: Start difference. First operand 5056 states and 6539 transitions. Second operand 13 states. [2018-11-07 06:27:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:27:53,802 INFO L93 Difference]: Finished difference Result 10261 states and 13838 transitions. [2018-11-07 06:27:53,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-07 06:27:53,802 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 528 [2018-11-07 06:27:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:27:53,831 INFO L225 Difference]: With dead ends: 10261 [2018-11-07 06:27:53,832 INFO L226 Difference]: Without dead ends: 5380 [2018-11-07 06:27:53,851 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1085 GetRequests, 1061 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2018-11-07 06:27:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2018-11-07 06:27:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 5246. [2018-11-07 06:27:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5246 states. [2018-11-07 06:27:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5246 states to 5246 states and 6562 transitions. [2018-11-07 06:27:53,981 INFO L78 Accepts]: Start accepts. Automaton has 5246 states and 6562 transitions. Word has length 528 [2018-11-07 06:27:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:27:53,982 INFO L480 AbstractCegarLoop]: Abstraction has 5246 states and 6562 transitions. [2018-11-07 06:27:53,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-07 06:27:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5246 states and 6562 transitions. [2018-11-07 06:27:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2018-11-07 06:27:53,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:27:53,996 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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] [2018-11-07 06:27:53,996 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:27:53,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:27:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2028625144, now seen corresponding path program 1 times [2018-11-07 06:27:53,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:27:53,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:53,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:27:53,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:27:53,998 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:27:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:27:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 432 proven. 463 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-11-07 06:27:55,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:27:55,417 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:27:55,418 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 577 with the following transitions: [2018-11-07 06:27:55,418 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [746], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:27:55,420 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:27:55,420 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:28:05,567 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:28:05,567 INFO L272 AbstractInterpreter]: Visited 145 different actions 579 times. Merged at 10 different actions 35 times. Widened at 1 different actions 1 times. Found 8 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 06:28:05,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:05,576 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:28:05,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:05,576 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:28:05,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:05,586 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:28:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:05,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:28:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-11-07 06:28:06,114 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:28:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 430 proven. 2 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-11-07 06:28:06,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:28:06,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 18 [2018-11-07 06:28:06,497 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:28:06,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 06:28:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 06:28:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-11-07 06:28:06,499 INFO L87 Difference]: Start difference. First operand 5246 states and 6562 transitions. Second operand 17 states. [2018-11-07 06:28:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:28:14,673 INFO L93 Difference]: Finished difference Result 12017 states and 16397 transitions. [2018-11-07 06:28:14,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-07 06:28:14,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 576 [2018-11-07 06:28:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:28:14,704 INFO L225 Difference]: With dead ends: 12017 [2018-11-07 06:28:14,704 INFO L226 Difference]: Without dead ends: 6334 [2018-11-07 06:28:14,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1173 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=697, Invalid=2725, Unknown=0, NotChecked=0, Total=3422 [2018-11-07 06:28:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2018-11-07 06:28:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 6162. [2018-11-07 06:28:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6162 states. [2018-11-07 06:28:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6162 states to 6162 states and 7177 transitions. [2018-11-07 06:28:14,859 INFO L78 Accepts]: Start accepts. Automaton has 6162 states and 7177 transitions. Word has length 576 [2018-11-07 06:28:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:28:14,860 INFO L480 AbstractCegarLoop]: Abstraction has 6162 states and 7177 transitions. [2018-11-07 06:28:14,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 06:28:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 6162 states and 7177 transitions. [2018-11-07 06:28:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2018-11-07 06:28:14,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:28:14,870 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:28:14,870 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:28:14,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:14,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1839562907, now seen corresponding path program 2 times [2018-11-07 06:28:14,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:28:14,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:14,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:14,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:14,872 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:28:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 426 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 06:28:15,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:15,663 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:28:15,664 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 06:28:15,664 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 06:28:15,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:15,664 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:28:15,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 06:28:15,673 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 06:28:15,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 06:28:15,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 06:28:15,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:28:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 675 proven. 6 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2018-11-07 06:28:16,500 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:28:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 675 proven. 86 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-11-07 06:28:17,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:28:17,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2018-11-07 06:28:17,195 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:28:17,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-07 06:28:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-07 06:28:17,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-07 06:28:17,197 INFO L87 Difference]: Start difference. First operand 6162 states and 7177 transitions. Second operand 9 states. [2018-11-07 06:28:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:28:20,207 INFO L93 Difference]: Finished difference Result 19484 states and 26623 transitions. [2018-11-07 06:28:20,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-07 06:28:20,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 621 [2018-11-07 06:28:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:28:20,307 INFO L225 Difference]: With dead ends: 19484 [2018-11-07 06:28:20,307 INFO L226 Difference]: Without dead ends: 13696 [2018-11-07 06:28:20,360 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1239 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2018-11-07 06:28:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13696 states. [2018-11-07 06:28:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13696 to 13138. [2018-11-07 06:28:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13138 states. [2018-11-07 06:28:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13138 states to 13138 states and 15283 transitions. [2018-11-07 06:28:20,745 INFO L78 Accepts]: Start accepts. Automaton has 13138 states and 15283 transitions. Word has length 621 [2018-11-07 06:28:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:28:20,746 INFO L480 AbstractCegarLoop]: Abstraction has 13138 states and 15283 transitions. [2018-11-07 06:28:20,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-07 06:28:20,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13138 states and 15283 transitions. [2018-11-07 06:28:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2018-11-07 06:28:20,758 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:28:20,759 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:28:20,759 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:28:20,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1417856340, now seen corresponding path program 1 times [2018-11-07 06:28:20,760 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:28:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:20,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 06:28:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:20,761 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:28:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 433 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 06:28:21,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:21,520 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:28:21,520 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 629 with the following transitions: [2018-11-07 06:28:21,521 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:28:21,524 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:28:21,524 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:28:27,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:28:27,429 INFO L272 AbstractInterpreter]: Visited 192 different actions 770 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 06:28:27,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:27,438 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:28:27,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:27,438 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:28:27,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:27,448 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:28:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:27,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:28:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 750 proven. 2 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2018-11-07 06:28:27,993 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:28:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1093 backedges. 433 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 06:28:28,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:28:28,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 06:28:28,472 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:28:28,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 06:28:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 06:28:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:28:28,474 INFO L87 Difference]: Start difference. First operand 13138 states and 15283 transitions. Second operand 7 states. [2018-11-07 06:28:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:28:31,168 INFO L93 Difference]: Finished difference Result 32348 states and 43420 transitions. [2018-11-07 06:28:31,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 06:28:31,168 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 628 [2018-11-07 06:28:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:28:31,307 INFO L225 Difference]: With dead ends: 32348 [2018-11-07 06:28:31,307 INFO L226 Difference]: Without dead ends: 19584 [2018-11-07 06:28:31,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1259 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 06:28:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2018-11-07 06:28:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 18985. [2018-11-07 06:28:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18985 states. [2018-11-07 06:28:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18985 states to 18985 states and 22479 transitions. [2018-11-07 06:28:31,973 INFO L78 Accepts]: Start accepts. Automaton has 18985 states and 22479 transitions. Word has length 628 [2018-11-07 06:28:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:28:31,974 INFO L480 AbstractCegarLoop]: Abstraction has 18985 states and 22479 transitions. [2018-11-07 06:28:31,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 06:28:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 18985 states and 22479 transitions. [2018-11-07 06:28:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 674 [2018-11-07 06:28:31,988 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:28:31,989 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:28:31,989 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:28:31,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash -275116733, now seen corresponding path program 1 times [2018-11-07 06:28:31,990 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:28:31,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:31,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:31,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:31,991 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:28:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 432 proven. 513 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-11-07 06:28:33,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:33,513 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:28:33,513 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 674 with the following transitions: [2018-11-07 06:28:33,513 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [866], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:28:33,516 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:28:33,516 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:28:39,021 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:28:39,022 INFO L272 AbstractInterpreter]: Visited 192 different actions 770 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 4 different actions. Largest state had 24 variables. [2018-11-07 06:28:39,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:39,031 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:28:39,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:39,031 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:28:39,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:39,042 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:28:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:39,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:28:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 795 proven. 2 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2018-11-07 06:28:39,762 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:28:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1138 backedges. 478 proven. 86 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-11-07 06:28:40,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:28:40,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 19 [2018-11-07 06:28:40,406 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:28:40,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 06:28:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 06:28:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2018-11-07 06:28:40,408 INFO L87 Difference]: Start difference. First operand 18985 states and 22479 transitions. Second operand 17 states. [2018-11-07 06:28:44,606 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2018-11-07 06:28:45,756 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-11-07 06:28:46,844 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2018-11-07 06:28:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:28:48,327 INFO L93 Difference]: Finished difference Result 38142 states and 45521 transitions. [2018-11-07 06:28:48,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-07 06:28:48,327 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 673 [2018-11-07 06:28:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:28:48,406 INFO L225 Difference]: With dead ends: 38142 [2018-11-07 06:28:48,407 INFO L226 Difference]: Without dead ends: 19531 [2018-11-07 06:28:48,477 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1368 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=583, Invalid=2069, Unknown=0, NotChecked=0, Total=2652 [2018-11-07 06:28:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2018-11-07 06:28:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 19456. [2018-11-07 06:28:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19456 states. [2018-11-07 06:28:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19456 states to 19456 states and 22679 transitions. [2018-11-07 06:28:48,986 INFO L78 Accepts]: Start accepts. Automaton has 19456 states and 22679 transitions. Word has length 673 [2018-11-07 06:28:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:28:48,987 INFO L480 AbstractCegarLoop]: Abstraction has 19456 states and 22679 transitions. [2018-11-07 06:28:48,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 06:28:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 19456 states and 22679 transitions. [2018-11-07 06:28:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2018-11-07 06:28:49,003 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:28:49,004 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:28:49,004 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:28:49,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:49,005 INFO L82 PathProgramCache]: Analyzing trace with hash -125966940, now seen corresponding path program 1 times [2018-11-07 06:28:49,005 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:28:49,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:49,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:49,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:49,006 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:28:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 616 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-11-07 06:28:50,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:50,048 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:28:50,049 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 789 with the following transitions: [2018-11-07 06:28:50,049 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:28:50,052 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:28:50,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 06:28:55,594 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 06:28:55,594 INFO L272 AbstractInterpreter]: Visited 193 different actions 774 times. Merged at 10 different actions 38 times. Widened at 1 different actions 1 times. Found 11 fixpoints after 5 different actions. Largest state had 24 variables. [2018-11-07 06:28:55,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:55,602 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 06:28:55,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:28:55,602 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:28:55,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:55,612 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:28:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:28:55,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:28:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 1015 proven. 2 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2018-11-07 06:28:56,244 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 06:28:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 616 proven. 86 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-11-07 06:28:56,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 06:28:56,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2018-11-07 06:28:56,846 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 06:28:56,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 06:28:56,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 06:28:56,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-07 06:28:56,848 INFO L87 Difference]: Start difference. First operand 19456 states and 22679 transitions. Second operand 7 states. [2018-11-07 06:28:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 06:28:59,107 INFO L93 Difference]: Finished difference Result 38411 states and 47129 transitions. [2018-11-07 06:28:59,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 06:28:59,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 788 [2018-11-07 06:28:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 06:28:59,231 INFO L225 Difference]: With dead ends: 38411 [2018-11-07 06:28:59,231 INFO L226 Difference]: Without dead ends: 19329 [2018-11-07 06:28:59,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1591 GetRequests, 1578 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-11-07 06:28:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19329 states. [2018-11-07 06:28:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19329 to 18558. [2018-11-07 06:28:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18558 states. [2018-11-07 06:28:59,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18558 states to 18558 states and 21352 transitions. [2018-11-07 06:28:59,860 INFO L78 Accepts]: Start accepts. Automaton has 18558 states and 21352 transitions. Word has length 788 [2018-11-07 06:28:59,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 06:28:59,861 INFO L480 AbstractCegarLoop]: Abstraction has 18558 states and 21352 transitions. [2018-11-07 06:28:59,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 06:28:59,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18558 states and 21352 transitions. [2018-11-07 06:28:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2018-11-07 06:28:59,879 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 06:28:59,879 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 06:28:59,880 INFO L423 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 06:28:59,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 06:28:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1223834549, now seen corresponding path program 1 times [2018-11-07 06:28:59,880 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 06:28:59,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:59,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:28:59,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 06:28:59,881 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 06:28:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:29:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 460 proven. 150 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2018-11-07 06:29:00,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:29:00,684 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 06:29:00,684 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 866 with the following transitions: [2018-11-07 06:29:00,684 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [77], [79], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [522], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [654], [655], [658], [659], [663], [667], [671], [675], [679], [683], [686], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [854], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [899], [903], [907], [911], [915], [919], [923], [927], [931], [934], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 06:29:00,687 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-07 06:29:00,688 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-11-07 06:29:05,079 WARN L572 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-11-07 06:29:05,080 WARN L158 AbstractInterpreter]: Abstract interpretation run out of time [2018-11-07 06:29:05,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 06:29:05,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 06:29:05,080 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:29:05,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 06:29:05,092 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 06:29:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 06:29:05,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 06:29:05,338 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-07 06:29:05,539 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 06:29:05,539 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 06:29:05,545 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 06:29:05,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:29:05 BoogieIcfgContainer [2018-11-07 06:29:05,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 06:29:05,547 INFO L168 Benchmark]: Toolchain (without parser) took 230292.22 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -872.0 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-11-07 06:29:05,548 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 06:29:05,548 INFO L168 Benchmark]: CACSL2BoogieTranslator took 914.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-07 06:29:05,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 173.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 06:29:05,549 INFO L168 Benchmark]: Boogie Preprocessor took 131.46 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 06:29:05,550 INFO L168 Benchmark]: RCFGBuilder took 3758.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 132.0 MB). Peak memory consumption was 132.0 MB. Max. memory is 7.1 GB. [2018-11-07 06:29:05,550 INFO L168 Benchmark]: TraceAbstraction took 225308.85 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -229.1 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-11-07 06:29:05,556 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 914.30 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 173.36 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 744.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -817.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.46 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 3758.39 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 132.0 MB). Peak memory consumption was 132.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225308.85 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -229.1 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 49). Cancelled while BasicCegarLoop was analyzing trace of length 866 with TraceHistMax 8,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 7 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 225.2s OverallTime, 15 OverallIterations, 8 TraceHistogramMax, 112.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1747 SDtfs, 24818 SDslu, 3239 SDs, 0 SdLazy, 31957 SolverSat, 5663 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.9s Time, PredicateUnifierStatistics: 6 DeclaredPredicates, 10660 GetRequests, 10334 SyntacticMatches, 13 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19456occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 73.0s AbstIntTime, 11 AbstIntIterations, 3 AbstIntStrong, 0.9970640028876294 AbsIntWeakeningRatio, 0.0964824120603015 AbsIntAvgWeakeningVarsNumRemoved, 15.903517587939698 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 2889 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 10509 NumberOfCodeBlocks, 10288 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 15110 ConstructedInterpolants, 0 QuantifiedInterpolants, 40209240 SizeOfPredicates, 29 NumberOfNonLiveVariables, 6638 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 30 InterpolantComputations, 3 PerfectInterpolantSequences, 22103/25309 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown