java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 14:55:42,170 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 14:55:42,174 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 14:55:42,192 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 14:55:42,194 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 14:55:42,195 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 14:55:42,196 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 14:55:42,199 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 14:55:42,202 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 14:55:42,203 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 14:55:42,205 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 14:55:42,206 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 14:55:42,207 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 14:55:42,209 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 14:55:42,210 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 14:55:42,219 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 14:55:42,222 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 14:55:42,224 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 14:55:42,229 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 14:55:42,231 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 14:55:42,235 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 14:55:42,237 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 14:55:42,243 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 14:55:42,243 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 14:55:42,244 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 14:55:42,245 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 14:55:42,246 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 14:55:42,247 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 14:55:42,251 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 14:55:42,252 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 14:55:42,252 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 14:55:42,254 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 14:55:42,254 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 14:55:42,255 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 14:55:42,256 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 14:55:42,256 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 14:55:42,257 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 14:55:42,283 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 14:55:42,284 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 14:55:42,284 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 14:55:42,284 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 14:55:42,285 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 14:55:42,285 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 14:55:42,285 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 14:55:42,285 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 14:55:42,285 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 14:55:42,289 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 14:55:42,289 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 14:55:42,289 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 14:55:42,290 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 14:55:42,290 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 14:55:42,290 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 14:55:42,290 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 14:55:42,291 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 14:55:42,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 14:55:42,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 14:55:42,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 14:55:42,293 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 14:55:42,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 14:55:42,294 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 14:55:42,294 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 14:55:42,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 14:55:42,294 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 14:55:42,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 14:55:42,294 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 14:55:42,295 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 14:55:42,295 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 14:55:42,296 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 14:55:42,296 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 14:55:42,296 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 14:55:42,296 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 14:55:42,352 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 14:55:42,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 14:55:42,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 14:55:42,369 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 14:55:42,370 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 14:55:42,371 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c [2018-10-27 14:55:42,427 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3a62216e2/72815e1855ed4ca7af4e173dc50ba626/FLAG75415d8be [2018-10-27 14:55:43,207 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 14:55:43,208 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label15_true-unreach-call.c [2018-10-27 14:55:43,229 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3a62216e2/72815e1855ed4ca7af4e173dc50ba626/FLAG75415d8be [2018-10-27 14:55:43,244 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3a62216e2/72815e1855ed4ca7af4e173dc50ba626 [2018-10-27 14:55:43,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 14:55:43,257 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 14:55:43,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 14:55:43,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 14:55:43,263 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 14:55:43,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:55:43" (1/1) ... [2018-10-27 14:55:43,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0e4d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:43, skipping insertion in model container [2018-10-27 14:55:43,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:55:43" (1/1) ... [2018-10-27 14:55:43,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 14:55:43,432 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 14:55:44,502 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:55:44,507 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 14:55:44,883 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 14:55:44,907 INFO L193 MainTranslator]: Completed translation [2018-10-27 14:55:44,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44 WrapperNode [2018-10-27 14:55:44,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 14:55:44,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 14:55:44,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 14:55:44,909 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 14:55:44,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:44,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 14:55:45,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 14:55:45,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 14:55:45,336 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 14:55:45,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... [2018-10-27 14:55:45,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 14:55:45,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 14:55:45,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 14:55:45,599 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 14:55:45,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:55:45,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 14:55:45,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 14:55:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 14:55:45,677 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 14:55:45,677 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 14:55:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 14:55:45,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 14:55:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 14:55:45,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 14:55:45,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 14:55:57,622 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 14:55:57,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:55:57 BoogieIcfgContainer [2018-10-27 14:55:57,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 14:55:57,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 14:55:57,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 14:55:57,629 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 14:55:57,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:55:43" (1/3) ... [2018-10-27 14:55:57,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225a00b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:55:57, skipping insertion in model container [2018-10-27 14:55:57,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:55:44" (2/3) ... [2018-10-27 14:55:57,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225a00b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:55:57, skipping insertion in model container [2018-10-27 14:55:57,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:55:57" (3/3) ... [2018-10-27 14:55:57,634 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label15_true-unreach-call.c [2018-10-27 14:55:57,645 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 14:55:57,658 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 14:55:57,678 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 14:55:57,724 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 14:55:57,725 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 14:55:57,725 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 14:55:57,725 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 14:55:57,725 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 14:55:57,725 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 14:55:57,726 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 14:55:57,726 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 14:55:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-10-27 14:55:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-27 14:55:57,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:55:57,789 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:55:57,792 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:55:57,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:55:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2012982790, now seen corresponding path program 1 times [2018-10-27 14:55:57,803 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:55:57,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:57,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:55:57,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:55:57,865 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:55:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:55:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:55:58,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:55:58,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:55:58,401 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:55:58,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:55:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:55:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:55:58,428 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-10-27 14:56:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:09,913 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-10-27 14:56:09,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:56:09,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2018-10-27 14:56:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:09,954 INFO L225 Difference]: With dead ends: 2164 [2018-10-27 14:56:09,954 INFO L226 Difference]: Without dead ends: 1554 [2018-10-27 14:56:09,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:56:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-10-27 14:56:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-10-27 14:56:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-10-27 14:56:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-10-27 14:56:10,097 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 43 [2018-10-27 14:56:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:10,098 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-10-27 14:56:10,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:56:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-10-27 14:56:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-27 14:56:10,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:10,107 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:56:10,108 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:10,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1160890231, now seen corresponding path program 1 times [2018-10-27 14:56:10,108 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:10,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:10,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:10,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:10,110 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:10,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:56:10,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:56:10,454 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:56:10,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:56:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:56:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:56:10,457 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-10-27 14:56:21,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:56:21,817 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-10-27 14:56:21,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-27 14:56:21,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2018-10-27 14:56:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:56:21,832 INFO L225 Difference]: With dead ends: 3031 [2018-10-27 14:56:21,833 INFO L226 Difference]: Without dead ends: 1985 [2018-10-27 14:56:21,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:56:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-10-27 14:56:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-10-27 14:56:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-10-27 14:56:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-10-27 14:56:21,910 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 115 [2018-10-27 14:56:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:56:21,911 INFO L481 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-10-27 14:56:21,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:56:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-10-27 14:56:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-27 14:56:21,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:56:21,916 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:56:21,916 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:56:21,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2146986351, now seen corresponding path program 1 times [2018-10-27 14:56:21,917 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:56:21,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:21,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:21,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:56:21,918 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:56:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:22,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:22,422 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:56:22,423 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 119 with the following transitions: [2018-10-27 14:56:22,425 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:56:22,492 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:56:22,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:56:22,943 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:56:25,724 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:56:25,726 INFO L272 AbstractInterpreter]: Visited 83 different actions 467 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:56:25,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:56:25,776 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:56:25,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:56:25,776 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:56:25,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:56:25,794 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:56:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:56:25,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:56:32,519 WARN L179 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 42 [2018-10-27 14:56:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:32,643 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:56:33,128 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2018-10-27 14:56:33,794 WARN L179 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-10-27 14:56:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:56:34,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:56:34,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-10-27 14:56:34,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:56:34,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 14:56:34,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 14:56:34,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 14:56:34,218 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 6 states. [2018-10-27 14:57:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:46,655 INFO L93 Difference]: Finished difference Result 7503 states and 12869 transitions. [2018-10-27 14:57:46,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 14:57:46,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2018-10-27 14:57:46,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:46,694 INFO L225 Difference]: With dead ends: 7503 [2018-10-27 14:57:46,694 INFO L226 Difference]: Without dead ends: 5550 [2018-10-27 14:57:46,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-27 14:57:46,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2018-10-27 14:57:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 5548. [2018-10-27 14:57:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5548 states. [2018-10-27 14:57:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5548 states to 5548 states and 8695 transitions. [2018-10-27 14:57:46,878 INFO L78 Accepts]: Start accepts. Automaton has 5548 states and 8695 transitions. Word has length 118 [2018-10-27 14:57:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:57:46,879 INFO L481 AbstractCegarLoop]: Abstraction has 5548 states and 8695 transitions. [2018-10-27 14:57:46,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 14:57:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5548 states and 8695 transitions. [2018-10-27 14:57:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-27 14:57:46,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:57:46,883 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-27 14:57:46,883 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:57:46,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash -785829609, now seen corresponding path program 1 times [2018-10-27 14:57:46,884 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:57:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:46,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:46,885 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:57:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:47,220 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:57:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:47,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:47,905 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:57:47,905 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 132 with the following transitions: [2018-10-27 14:57:47,906 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:57:47,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:57:47,915 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:57:48,015 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:57:48,731 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:57:48,732 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:57:48,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:48,757 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:57:48,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:57:48,758 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:57:48,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:48,772 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:57:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:48,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:57:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:48,998 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:57:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:49,477 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 14:57:49,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-10-27 14:57:49,478 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:57:49,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 14:57:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 14:57:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:57:49,479 INFO L87 Difference]: Start difference. First operand 5548 states and 8695 transitions. Second operand 3 states. [2018-10-27 14:57:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:57:54,696 INFO L93 Difference]: Finished difference Result 13710 states and 21448 transitions. [2018-10-27 14:57:54,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 14:57:54,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2018-10-27 14:57:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:57:54,747 INFO L225 Difference]: With dead ends: 13710 [2018-10-27 14:57:54,747 INFO L226 Difference]: Without dead ends: 8168 [2018-10-27 14:57:54,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 261 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:57:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8168 states. [2018-10-27 14:57:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8168 to 8167. [2018-10-27 14:57:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8167 states. [2018-10-27 14:57:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 12041 transitions. [2018-10-27 14:57:55,019 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 12041 transitions. Word has length 131 [2018-10-27 14:57:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:57:55,020 INFO L481 AbstractCegarLoop]: Abstraction has 8167 states and 12041 transitions. [2018-10-27 14:57:55,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 14:57:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 12041 transitions. [2018-10-27 14:57:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-27 14:57:55,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:57:55,023 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:57:55,024 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:57:55,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:57:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1575860037, now seen corresponding path program 1 times [2018-10-27 14:57:55,024 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:57:55,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:55,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:57:55,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:57:55,026 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:57:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:57:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:57:55,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:57:55,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 14:57:55,324 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:57:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 14:57:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 14:57:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 14:57:55,325 INFO L87 Difference]: Start difference. First operand 8167 states and 12041 transitions. Second operand 5 states. [2018-10-27 14:58:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:10,186 INFO L93 Difference]: Finished difference Result 25839 states and 40100 transitions. [2018-10-27 14:58:10,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 14:58:10,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2018-10-27 14:58:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:10,285 INFO L225 Difference]: With dead ends: 25839 [2018-10-27 14:58:10,285 INFO L226 Difference]: Without dead ends: 17678 [2018-10-27 14:58:10,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 14:58:10,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17678 states. [2018-10-27 14:58:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17678 to 17552. [2018-10-27 14:58:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17552 states. [2018-10-27 14:58:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17552 states to 17552 states and 24343 transitions. [2018-10-27 14:58:10,974 INFO L78 Accepts]: Start accepts. Automaton has 17552 states and 24343 transitions. Word has length 133 [2018-10-27 14:58:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:10,975 INFO L481 AbstractCegarLoop]: Abstraction has 17552 states and 24343 transitions. [2018-10-27 14:58:10,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 14:58:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 17552 states and 24343 transitions. [2018-10-27 14:58:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-27 14:58:10,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:10,986 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:10,986 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:10,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1752060658, now seen corresponding path program 1 times [2018-10-27 14:58:10,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:10,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:10,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:10,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:10,993 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:11,303 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-10-27 14:58:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-27 14:58:11,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:11,728 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:58:11,728 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 197 with the following transitions: [2018-10-27 14:58:11,728 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1235], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:58:11,735 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:58:11,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:58:11,819 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:58:13,762 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:58:13,762 INFO L272 AbstractInterpreter]: Visited 87 different actions 491 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:58:13,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:13,801 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:58:13,801 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:13,801 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:58:13,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:13,813 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:58:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:13,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:58:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:14,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:58:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:14,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:58:14,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-10-27 14:58:14,985 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:58:14,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-27 14:58:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-27 14:58:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:58:14,986 INFO L87 Difference]: Start difference. First operand 17552 states and 24343 transitions. Second operand 9 states. [2018-10-27 14:58:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:25,878 INFO L93 Difference]: Finished difference Result 35637 states and 50027 transitions. [2018-10-27 14:58:25,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-27 14:58:25,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 196 [2018-10-27 14:58:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:25,938 INFO L225 Difference]: With dead ends: 35637 [2018-10-27 14:58:25,938 INFO L226 Difference]: Without dead ends: 15448 [2018-10-27 14:58:25,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 390 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-10-27 14:58:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15448 states. [2018-10-27 14:58:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15448 to 14975. [2018-10-27 14:58:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14975 states. [2018-10-27 14:58:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14975 states to 14975 states and 17887 transitions. [2018-10-27 14:58:26,272 INFO L78 Accepts]: Start accepts. Automaton has 14975 states and 17887 transitions. Word has length 196 [2018-10-27 14:58:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:26,272 INFO L481 AbstractCegarLoop]: Abstraction has 14975 states and 17887 transitions. [2018-10-27 14:58:26,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-27 14:58:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14975 states and 17887 transitions. [2018-10-27 14:58:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-27 14:58:26,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:26,282 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:26,282 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:26,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:26,282 INFO L82 PathProgramCache]: Analyzing trace with hash 768786709, now seen corresponding path program 1 times [2018-10-27 14:58:26,283 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:26,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:26,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:26,284 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:26,963 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-10-27 14:58:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 73 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 14:58:27,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:27,562 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:58:27,562 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 298 with the following transitions: [2018-10-27 14:58:27,563 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1692], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:58:27,569 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:58:27,569 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:58:27,674 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:58:28,555 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:58:28,556 INFO L272 AbstractInterpreter]: Visited 175 different actions 511 times. Merged at 5 different actions 9 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-10-27 14:58:28,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:28,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:58:28,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:28,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:58:28,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:28,600 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:58:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:28,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:58:29,262 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2018-10-27 14:58:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-10-27 14:58:29,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:58:30,054 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-10-27 14:58:30,478 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-10-27 14:58:31,031 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2018-10-27 14:58:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 77 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 14:58:34,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-10-27 14:58:34,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 21 [2018-10-27 14:58:34,430 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:58:34,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 14:58:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 14:58:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=335, Unknown=1, NotChecked=0, Total=420 [2018-10-27 14:58:34,431 INFO L87 Difference]: Start difference. First operand 14975 states and 17887 transitions. Second operand 7 states. [2018-10-27 14:58:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:58:49,092 INFO L93 Difference]: Finished difference Result 48720 states and 59964 transitions. [2018-10-27 14:58:49,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-27 14:58:49,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 297 [2018-10-27 14:58:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:58:49,207 INFO L225 Difference]: With dead ends: 48720 [2018-10-27 14:58:49,207 INFO L226 Difference]: Without dead ends: 31928 [2018-10-27 14:58:49,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 583 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=138, Invalid=461, Unknown=1, NotChecked=0, Total=600 [2018-10-27 14:58:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31928 states. [2018-10-27 14:58:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31928 to 26570. [2018-10-27 14:58:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26570 states. [2018-10-27 14:58:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26570 states to 26570 states and 32105 transitions. [2018-10-27 14:58:49,833 INFO L78 Accepts]: Start accepts. Automaton has 26570 states and 32105 transitions. Word has length 297 [2018-10-27 14:58:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:58:49,837 INFO L481 AbstractCegarLoop]: Abstraction has 26570 states and 32105 transitions. [2018-10-27 14:58:49,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 14:58:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 26570 states and 32105 transitions. [2018-10-27 14:58:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-10-27 14:58:49,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:58:49,851 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:58:49,851 INFO L424 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:58:49,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1726038883, now seen corresponding path program 1 times [2018-10-27 14:58:49,851 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:58:49,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:49,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:49,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:58:49,853 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:58:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:58:50,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:50,355 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:58:50,355 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 385 with the following transitions: [2018-10-27 14:58:50,356 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1235], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1723], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:58:50,361 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:58:50,361 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:58:50,415 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:58:52,263 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:58:52,263 INFO L272 AbstractInterpreter]: Visited 185 different actions 1094 times. Merged at 8 different actions 42 times. Widened at 1 different actions 1 times. Found 9 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:58:52,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:58:52,270 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:58:52,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:58:52,270 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:58:52,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:58:52,287 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:58:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:58:52,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:58:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:58:52,589 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:58:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-10-27 14:58:52,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:58:52,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2018-10-27 14:58:52,932 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:58:52,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-27 14:58:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-27 14:58:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-27 14:58:52,933 INFO L87 Difference]: Start difference. First operand 26570 states and 32105 transitions. Second operand 8 states. [2018-10-27 14:59:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:17,828 INFO L93 Difference]: Finished difference Result 90695 states and 112865 transitions. [2018-10-27 14:59:17,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-27 14:59:17,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 384 [2018-10-27 14:59:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:18,015 INFO L225 Difference]: With dead ends: 90695 [2018-10-27 14:59:18,015 INFO L226 Difference]: Without dead ends: 53193 [2018-10-27 14:59:18,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 775 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2018-10-27 14:59:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53193 states. [2018-10-27 14:59:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53193 to 45788. [2018-10-27 14:59:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45788 states. [2018-10-27 14:59:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45788 states to 45788 states and 54609 transitions. [2018-10-27 14:59:19,160 INFO L78 Accepts]: Start accepts. Automaton has 45788 states and 54609 transitions. Word has length 384 [2018-10-27 14:59:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:19,161 INFO L481 AbstractCegarLoop]: Abstraction has 45788 states and 54609 transitions. [2018-10-27 14:59:19,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-27 14:59:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45788 states and 54609 transitions. [2018-10-27 14:59:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-10-27 14:59:19,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:19,184 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:19,184 INFO L424 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:19,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1385681827, now seen corresponding path program 1 times [2018-10-27 14:59:19,185 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:19,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:19,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:19,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:19,186 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-10-27 14:59:19,579 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 14:59:19,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 14:59:19,580 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 14:59:19,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 14:59:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 14:59:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:19,581 INFO L87 Difference]: Start difference. First operand 45788 states and 54609 transitions. Second operand 4 states. [2018-10-27 14:59:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 14:59:26,120 INFO L93 Difference]: Finished difference Result 115874 states and 139694 transitions. [2018-10-27 14:59:26,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 14:59:26,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 440 [2018-10-27 14:59:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 14:59:26,326 INFO L225 Difference]: With dead ends: 115874 [2018-10-27 14:59:26,326 INFO L226 Difference]: Without dead ends: 65823 [2018-10-27 14:59:26,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 14:59:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65823 states. [2018-10-27 14:59:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65823 to 61347. [2018-10-27 14:59:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61347 states. [2018-10-27 14:59:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61347 states to 61347 states and 72128 transitions. [2018-10-27 14:59:28,057 INFO L78 Accepts]: Start accepts. Automaton has 61347 states and 72128 transitions. Word has length 440 [2018-10-27 14:59:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 14:59:28,058 INFO L481 AbstractCegarLoop]: Abstraction has 61347 states and 72128 transitions. [2018-10-27 14:59:28,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 14:59:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 61347 states and 72128 transitions. [2018-10-27 14:59:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-27 14:59:28,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 14:59:28,081 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 14:59:28,082 INFO L424 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 14:59:28,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:28,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1477568361, now seen corresponding path program 1 times [2018-10-27 14:59:28,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 14:59:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:28,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:28,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 14:59:28,083 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 14:59:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 112 proven. 17 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2018-10-27 14:59:28,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:59:28,741 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 14:59:28,741 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 448 with the following transitions: [2018-10-27 14:59:28,741 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [846], [854], [862], [870], [878], [886], [894], [902], [910], [918], [926], [934], [942], [950], [954], [956], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1873], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-10-27 14:59:28,746 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 14:59:28,746 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 14:59:28,830 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 14:59:35,616 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 14:59:35,616 INFO L272 AbstractInterpreter]: Visited 216 different actions 1708 times. Merged at 8 different actions 58 times. Widened at 1 different actions 3 times. Found 11 fixpoints after 2 different actions. Largest state had 26 variables. [2018-10-27 14:59:35,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 14:59:35,622 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 14:59:35,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 14:59:35,622 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 14:59:35,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 14:59:35,630 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 14:59:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 14:59:35,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 14:59:36,066 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-10-27 14:59:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 355 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-10-27 14:59:36,276 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 14:59:36,944 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-27 14:59:37,236 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-10-27 14:59:37,282 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-10-27 14:59:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 114 proven. 275 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-10-27 14:59:38,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 14:59:38,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-10-27 14:59:38,882 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 14:59:38,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-27 14:59:38,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-27 14:59:38,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2018-10-27 14:59:38,883 INFO L87 Difference]: Start difference. First operand 61347 states and 72128 transitions. Second operand 15 states. Received shutdown request... [2018-10-27 14:59:39,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-27 14:59:39,456 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 14:59:39,463 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 14:59:39,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:59:39 BoogieIcfgContainer [2018-10-27 14:59:39,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 14:59:39,465 INFO L168 Benchmark]: Toolchain (without parser) took 236208.96 ms. Allocated memory was 1.5 GB in the beginning and 3.9 GB in the end (delta: 2.4 GB). Free memory was 1.4 GB in the beginning and 3.1 GB in the end (delta: -1.7 GB). Peak memory consumption was 673.2 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,466 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 14:59:39,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1649.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,467 INFO L168 Benchmark]: Boogie Procedure Inliner took 426.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -947.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,468 INFO L168 Benchmark]: Boogie Preprocessor took 262.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,469 INFO L168 Benchmark]: RCFGBuilder took 12026.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 458.0 MB). Peak memory consumption was 458.0 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,470 INFO L168 Benchmark]: TraceAbstraction took 221838.60 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.1 GB in the end (delta: -1.4 GB). Peak memory consumption was 187.6 MB. Max. memory is 7.1 GB. [2018-10-27 14:59:39,475 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1649.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 426.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 795.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -947.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 262.14 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12026.26 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 458.0 MB). Peak memory consumption was 458.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221838.60 ms. Allocated memory was 2.3 GB in the beginning and 3.9 GB in the end (delta: 1.6 GB). Free memory was 1.7 GB in the beginning and 3.1 GB in the end (delta: -1.4 GB). Peak memory consumption was 187.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 116]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 116). Cancelled while BasicCegarLoop was constructing difference of abstraction (61347states) and FLOYD_HOARE automaton (currently 5 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (163 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 221.7s OverallTime, 10 OverallIterations, 4 TraceHistogramMax, 174.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2738 SDtfs, 17468 SDslu, 2563 SDs, 0 SdLazy, 32552 SolverSat, 7774 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 160.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3264 GetRequests, 3137 SyntacticMatches, 16 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 17.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61347occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 16.0s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 4.7s AutomataMinimizationTime, 9 MinimizatonAttempts, 18369 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 3877 NumberOfCodeBlocks, 3877 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5428 ConstructedInterpolants, 444 QuantifiedInterpolants, 11036815 SizeOfPredicates, 11 NumberOfNonLiveVariables, 2732 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 3308/3861 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown