java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 19:29:20,245 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 19:29:20,249 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 19:29:20,264 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 19:29:20,264 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 19:29:20,265 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 19:29:20,267 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 19:29:20,270 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 19:29:20,274 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 19:29:20,275 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 19:29:20,284 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 19:29:20,285 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 19:29:20,289 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 19:29:20,290 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 19:29:20,291 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 19:29:20,292 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 19:29:20,293 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 19:29:20,297 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 19:29:20,302 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 19:29:20,303 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 19:29:20,307 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 19:29:20,308 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 19:29:20,314 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 19:29:20,314 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 19:29:20,314 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 19:29:20,315 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 19:29:20,316 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 19:29:20,317 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 19:29:20,318 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 19:29:20,319 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 19:29:20,319 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 19:29:20,319 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-12 19:29:20,322 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 19:29:20,340 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 19:29:20,340 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 19:29:20,342 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 19:29:20,342 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 19:29:20,342 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 19:29:20,342 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 19:29:20,343 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 19:29:20,343 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 19:29:20,343 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 19:29:20,343 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 19:29:20,343 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 19:29:20,344 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 19:29:20,345 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 19:29:20,345 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 19:29:20,346 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 19:29:20,346 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 19:29:20,346 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 19:29:20,346 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 19:29:20,346 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 19:29:20,347 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 19:29:20,348 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 19:29:20,348 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 19:29:20,349 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 19:29:20,349 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 19:29:20,349 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 19:29:20,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:29:20,349 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 19:29:20,350 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 19:29:20,351 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 19:29:20,351 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 19:29:20,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 19:29:20,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 19:29:20,433 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 19:29:20,434 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 19:29:20,434 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 19:29:20,435 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-11-12 19:29:20,498 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda0111fa/308db5a59d494d3eb2341c96d293463f/FLAGdbea74745 [2018-11-12 19:29:21,255 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 19:29:21,256 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label11_true-unreach-call.c [2018-11-12 19:29:21,280 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda0111fa/308db5a59d494d3eb2341c96d293463f/FLAGdbea74745 [2018-11-12 19:29:21,299 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda0111fa/308db5a59d494d3eb2341c96d293463f [2018-11-12 19:29:21,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 19:29:21,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 19:29:21,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 19:29:21,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 19:29:21,318 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 19:29:21,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:29:21" (1/1) ... [2018-11-12 19:29:21,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e53ccc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:21, skipping insertion in model container [2018-11-12 19:29:21,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:29:21" (1/1) ... [2018-11-12 19:29:21,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 19:29:21,446 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 19:29:22,419 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:29:22,423 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 19:29:22,838 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 19:29:22,863 INFO L193 MainTranslator]: Completed translation [2018-11-12 19:29:22,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22 WrapperNode [2018-11-12 19:29:22,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 19:29:22,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 19:29:22,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 19:29:22,865 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 19:29:23,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,147 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 19:29:23,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 19:29:23,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 19:29:23,148 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 19:29:23,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... [2018-11-12 19:29:23,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 19:29:23,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 19:29:23,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 19:29:23,395 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 19:29:23,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 19:29:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 19:29:23,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 19:29:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 19:29:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 19:29:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 19:29:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 19:29:23,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 19:29:23,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 19:29:23,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 19:29:23,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 19:29:23,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 19:29:31,940 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 19:29:31,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:29:31 BoogieIcfgContainer [2018-11-12 19:29:31,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 19:29:31,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 19:29:31,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 19:29:31,946 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 19:29:31,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:29:21" (1/3) ... [2018-11-12 19:29:31,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abcee89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:29:31, skipping insertion in model container [2018-11-12 19:29:31,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:29:22" (2/3) ... [2018-11-12 19:29:31,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abcee89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:29:31, skipping insertion in model container [2018-11-12 19:29:31,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:29:31" (3/3) ... [2018-11-12 19:29:31,950 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label11_true-unreach-call.c [2018-11-12 19:29:31,960 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 19:29:31,969 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 19:29:31,986 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 19:29:32,041 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 19:29:32,041 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 19:29:32,041 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 19:29:32,042 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 19:29:32,042 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 19:29:32,042 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 19:29:32,042 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 19:29:32,042 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 19:29:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 19:29:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-12 19:29:32,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:29:32,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:29:32,096 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:29:32,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:29:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -492133930, now seen corresponding path program 1 times [2018-11-12 19:29:32,105 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:29:32,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:32,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:29:32,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:32,151 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:29:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:29:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:29:32,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:29:32,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 19:29:32,691 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:29:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 19:29:32,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 19:29:32,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:29:32,725 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 19:29:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:29:41,154 INFO L93 Difference]: Finished difference Result 2164 states and 4009 transitions. [2018-11-12 19:29:41,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 19:29:41,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2018-11-12 19:29:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:29:41,189 INFO L225 Difference]: With dead ends: 2164 [2018-11-12 19:29:41,189 INFO L226 Difference]: Without dead ends: 1554 [2018-11-12 19:29:41,199 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 19:29:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2018-11-12 19:29:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1052. [2018-11-12 19:29:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2018-11-12 19:29:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1882 transitions. [2018-11-12 19:29:41,343 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1882 transitions. Word has length 63 [2018-11-12 19:29:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:29:41,344 INFO L480 AbstractCegarLoop]: Abstraction has 1052 states and 1882 transitions. [2018-11-12 19:29:41,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 19:29:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1882 transitions. [2018-11-12 19:29:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-12 19:29:41,353 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:29:41,353 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:29:41,354 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:29:41,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:29:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1696460921, now seen corresponding path program 1 times [2018-11-12 19:29:41,354 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:29:41,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:41,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:29:41,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:41,356 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:29:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:29:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:29:41,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 19:29:41,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 19:29:41,612 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:29:41,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 19:29:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 19:29:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 19:29:41,615 INFO L87 Difference]: Start difference. First operand 1052 states and 1882 transitions. Second operand 5 states. [2018-11-12 19:29:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:29:48,782 INFO L93 Difference]: Finished difference Result 3031 states and 5537 transitions. [2018-11-12 19:29:48,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:29:48,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2018-11-12 19:29:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:29:48,797 INFO L225 Difference]: With dead ends: 3031 [2018-11-12 19:29:48,798 INFO L226 Difference]: Without dead ends: 1985 [2018-11-12 19:29:48,802 INFO L604 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 [2018-11-12 19:29:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2018-11-12 19:29:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1959. [2018-11-12 19:29:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1959 states. [2018-11-12 19:29:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3239 transitions. [2018-11-12 19:29:48,870 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3239 transitions. Word has length 135 [2018-11-12 19:29:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:29:48,871 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 3239 transitions. [2018-11-12 19:29:48,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 19:29:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3239 transitions. [2018-11-12 19:29:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-12 19:29:48,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:29:48,878 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, 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] [2018-11-12 19:29:48,878 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:29:48,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:29:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1297606689, now seen corresponding path program 1 times [2018-11-12 19:29:48,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:29:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:48,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:29:48,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:29:48,880 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:29:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:29:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:29:49,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:29:49,662 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:29:49,663 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 139 with the following transitions: [2018-11-12 19:29:49,665 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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] [2018-11-12 19:29:49,716 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:29:49,716 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:29:50,176 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:29:50,952 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:29:50,954 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Performed 3901 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3901 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:29:51,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:29:51,002 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:29:51,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:29:51,002 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:29:51,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:29:51,022 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:29:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:29:51,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:29:56,719 WARN L179 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 32 [2018-11-12 19:29:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:29:59,095 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:29:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:29:59,483 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 19:29:59,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 11 [2018-11-12 19:29:59,484 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:29:59,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:29:59,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:29:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-12 19:29:59,485 INFO L87 Difference]: Start difference. First operand 1959 states and 3239 transitions. Second operand 3 states. [2018-11-12 19:30:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:30:03,687 INFO L93 Difference]: Finished difference Result 5693 states and 9655 transitions. [2018-11-12 19:30:03,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:30:03,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2018-11-12 19:30:03,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:30:03,716 INFO L225 Difference]: With dead ends: 5693 [2018-11-12 19:30:03,716 INFO L226 Difference]: Without dead ends: 3740 [2018-11-12 19:30:03,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2018-11-12 19:30:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2018-11-12 19:30:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3734. [2018-11-12 19:30:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2018-11-12 19:30:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 6077 transitions. [2018-11-12 19:30:03,832 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 6077 transitions. Word has length 138 [2018-11-12 19:30:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:30:03,833 INFO L480 AbstractCegarLoop]: Abstraction has 3734 states and 6077 transitions. [2018-11-12 19:30:03,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:30:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 6077 transitions. [2018-11-12 19:30:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-11-12 19:30:03,843 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:30:03,844 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:30:03,844 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:30:03,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:03,845 INFO L82 PathProgramCache]: Analyzing trace with hash -291330969, now seen corresponding path program 1 times [2018-11-12 19:30:03,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:30:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:03,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:03,846 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:30:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:04,136 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 19:30:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 113 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-11-12 19:30:04,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:04,201 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:30:04,201 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 236 with the following transitions: [2018-11-12 19:30:04,202 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1310], [1315], [1317], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:30:04,207 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:30:04,208 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:30:04,299 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:30:04,894 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:30:04,895 INFO L272 AbstractInterpreter]: Visited 104 different actions 298 times. Merged at 5 different actions 9 times. Never widened. Performed 5177 root evaluator evaluations with a maximum evaluation depth of 6. Performed 5177 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:30:04,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:04,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:30:04,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:04,935 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:30:04,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:04,951 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:30:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:05,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:30:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:30:05,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:30:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:30:05,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:30:05,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2018-11-12 19:30:05,421 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:30:05,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 19:30:05,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 19:30:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-11-12 19:30:05,423 INFO L87 Difference]: Start difference. First operand 3734 states and 6077 transitions. Second operand 9 states. [2018-11-12 19:30:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:30:11,088 INFO L93 Difference]: Finished difference Result 9302 states and 15012 transitions. [2018-11-12 19:30:11,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 19:30:11,089 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 235 [2018-11-12 19:30:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:30:11,114 INFO L225 Difference]: With dead ends: 9302 [2018-11-12 19:30:11,114 INFO L226 Difference]: Without dead ends: 4595 [2018-11-12 19:30:11,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2018-11-12 19:30:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4595 states. [2018-11-12 19:30:11,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4595 to 4560. [2018-11-12 19:30:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2018-11-12 19:30:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 5524 transitions. [2018-11-12 19:30:11,261 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 5524 transitions. Word has length 235 [2018-11-12 19:30:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:30:11,261 INFO L480 AbstractCegarLoop]: Abstraction has 4560 states and 5524 transitions. [2018-11-12 19:30:11,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 19:30:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 5524 transitions. [2018-11-12 19:30:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-11-12 19:30:11,268 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:30:11,269 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, 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, 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] [2018-11-12 19:30:11,269 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:30:11,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1705786468, now seen corresponding path program 1 times [2018-11-12 19:30:11,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:30:11,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:11,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:11,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:11,271 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:30:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 170 proven. 19 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-11-12 19:30:11,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:11,831 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:30:11,831 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2018-11-12 19:30:11,832 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:30:11,836 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:30:11,837 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:30:11,998 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:30:12,641 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:30:12,641 INFO L272 AbstractInterpreter]: Visited 120 different actions 346 times. Merged at 5 different actions 9 times. Never widened. Performed 6640 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6640 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:30:12,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:12,677 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:30:12,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:12,678 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:30:12,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:12,691 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:30:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:12,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:30:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 341 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-11-12 19:30:13,665 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:30:14,708 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-11-12 19:30:14,713 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2018-11-12 19:30:14,755 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2018-11-12 19:30:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 174 proven. 221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 19:30:15,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:30:15,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2018-11-12 19:30:15,602 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:30:15,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 19:30:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 19:30:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2018-11-12 19:30:15,604 INFO L87 Difference]: Start difference. First operand 4560 states and 5524 transitions. Second operand 15 states. [2018-11-12 19:30:21,195 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 19:30:38,031 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2018-11-12 19:30:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:30:43,104 INFO L93 Difference]: Finished difference Result 28491 states and 37168 transitions. [2018-11-12 19:30:43,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-12 19:30:43,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 333 [2018-11-12 19:30:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:30:43,234 INFO L225 Difference]: With dead ends: 28491 [2018-11-12 19:30:43,234 INFO L226 Difference]: Without dead ends: 23048 [2018-11-12 19:30:43,286 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 658 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=812, Invalid=3610, Unknown=0, NotChecked=0, Total=4422 [2018-11-12 19:30:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23048 states. [2018-11-12 19:30:43,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23048 to 21921. [2018-11-12 19:30:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21921 states. [2018-11-12 19:30:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21921 states to 21921 states and 26187 transitions. [2018-11-12 19:30:43,853 INFO L78 Accepts]: Start accepts. Automaton has 21921 states and 26187 transitions. Word has length 333 [2018-11-12 19:30:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:30:43,853 INFO L480 AbstractCegarLoop]: Abstraction has 21921 states and 26187 transitions. [2018-11-12 19:30:43,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 19:30:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 21921 states and 26187 transitions. [2018-11-12 19:30:43,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-11-12 19:30:43,870 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:30:43,871 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:30:43,871 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:30:43,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1877965642, now seen corresponding path program 1 times [2018-11-12 19:30:43,872 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:30:43,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:43,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:43,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:30:43,873 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:30:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:30:44,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:44,847 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:30:44,847 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 412 with the following transitions: [2018-11-12 19:30:44,848 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [10], [14], [18], [22], [26], [37], [41], [45], [56], [60], [64], [68], [72], [76], [80], [84], [88], [92], [96], [100], [104], [115], [119], [123], [127], [138], [142], [146], [150], [154], [158], [169], [173], [177], [181], [185], [189], [193], [204], [208], [212], [216], [227], [231], [235], [239], [250], [254], [258], [262], [266], [270], [273], [710], [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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1728], [1732], [1736], [1747], [1751], [1755], [1759], [1763], [1767], [1771], [1775], [1779], [1783], [1787], [1791], [1795], [1799], [1803], [1807], [1818], [1822], [1826], [1830], [1834], [1838], [1842], [1846], [1850], [1854], [1858], [1862], [1866], [1870], [1874], [1878], [1882], [1886], [1890], [1894], [1898], [1902], [1906], [1910], [1914], [1918], [1922], [1933], [1937], [1941], [1945], [1949], [1960], [1964], [1968], [1972], [1976], [1980], [1984], [1988], [1992], [1996], [2000], [2004], [2008], [2012], [2016], [2020], [2024], [2028], [2039], [2043], [2047], [2051], [2055], [2066], [2070], [2074], [2078], [2089], [2093], [2104], [2108], [2119], [2123], [2127], [2131], [2135], [2139], [2143], [2147], [2151], [2155], [2159], [2163], [2167], [2171], [2175], [2179], [2183], [2187], [2191], [2202], [2206], [2210], [2214], [2218], [2229], [2233], [2237], [2241], [2252], [2256], [2260], [2264], [2268], [2272], [2276], [2278], [2279], [2283], [2287], [2293], [2297], [2299], [2304], [2305], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:30:44,858 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:30:44,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:30:48,311 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:30:48,312 INFO L272 AbstractInterpreter]: Visited 356 different actions 2105 times. Merged at 5 different actions 25 times. Widened at 1 different actions 1 times. Performed 36160 root evaluator evaluations with a maximum evaluation depth of 6. Performed 36160 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 19:30:48,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:30:48,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:30:48,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:30:48,338 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:30:48,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:30:48,347 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:30:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:30:48,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:30:50,681 WARN L179 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 38 [2018-11-12 19:30:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:30:51,137 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:30:51,395 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 36 [2018-11-12 19:30:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 19:30:53,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 19:30:53,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-11-12 19:30:53,827 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:30:53,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 19:30:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 19:30:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-12 19:30:53,829 INFO L87 Difference]: Start difference. First operand 21921 states and 26187 transitions. Second operand 6 states. [2018-11-12 19:31:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:31:02,490 INFO L93 Difference]: Finished difference Result 51700 states and 61884 transitions. [2018-11-12 19:31:02,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 19:31:02,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 411 [2018-11-12 19:31:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:31:02,581 INFO L225 Difference]: With dead ends: 51700 [2018-11-12 19:31:02,582 INFO L226 Difference]: Without dead ends: 30225 [2018-11-12 19:31:02,628 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 816 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-12 19:31:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2018-11-12 19:31:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 29757. [2018-11-12 19:31:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29757 states. [2018-11-12 19:31:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29757 states to 29757 states and 35410 transitions. [2018-11-12 19:31:03,157 INFO L78 Accepts]: Start accepts. Automaton has 29757 states and 35410 transitions. Word has length 411 [2018-11-12 19:31:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:31:03,158 INFO L480 AbstractCegarLoop]: Abstraction has 29757 states and 35410 transitions. [2018-11-12 19:31:03,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 19:31:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 29757 states and 35410 transitions. [2018-11-12 19:31:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-11-12 19:31:03,184 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:03,185 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:31:03,185 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:03,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1258249865, now seen corresponding path program 1 times [2018-11-12 19:31:03,186 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:03,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:03,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:03,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:03,187 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 240 proven. 2 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2018-11-12 19:31:03,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:03,560 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:31:03,560 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 468 with the following transitions: [2018-11-12 19:31:03,560 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [1376], [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], [1508], [1511], [1515], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:31:03,564 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:31:03,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:31:03,620 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:31:04,366 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:31:04,366 INFO L272 AbstractInterpreter]: Visited 145 different actions 574 times. Merged at 7 different actions 28 times. Never widened. Performed 9673 root evaluator evaluations with a maximum evaluation depth of 6. Performed 9673 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 19:31:04,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:04,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:31:04,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:04,380 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:31:04,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:04,390 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:31:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:04,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:31:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 557 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2018-11-12 19:31:04,806 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:31:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 246 proven. 8 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2018-11-12 19:31:05,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 19:31:05,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2018-11-12 19:31:05,372 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 19:31:05,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 19:31:05,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 19:31:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:31:05,373 INFO L87 Difference]: Start difference. First operand 29757 states and 35410 transitions. Second operand 3 states. [2018-11-12 19:31:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:31:06,996 INFO L93 Difference]: Finished difference Result 57700 states and 68783 transitions. [2018-11-12 19:31:06,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 19:31:06,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2018-11-12 19:31:06,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:31:07,084 INFO L225 Difference]: With dead ends: 57700 [2018-11-12 19:31:07,085 INFO L226 Difference]: Without dead ends: 28387 [2018-11-12 19:31:07,134 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 930 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-12 19:31:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2018-11-12 19:31:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 28383. [2018-11-12 19:31:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28383 states. [2018-11-12 19:31:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28383 states to 28383 states and 33637 transitions. [2018-11-12 19:31:07,585 INFO L78 Accepts]: Start accepts. Automaton has 28383 states and 33637 transitions. Word has length 467 [2018-11-12 19:31:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:31:07,586 INFO L480 AbstractCegarLoop]: Abstraction has 28383 states and 33637 transitions. [2018-11-12 19:31:07,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 19:31:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28383 states and 33637 transitions. [2018-11-12 19:31:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-11-12 19:31:07,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:07,613 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:31:07,613 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:07,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash -404401180, now seen corresponding path program 1 times [2018-11-12 19:31:07,614 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:07,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:07,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:07,615 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 166 proven. 180 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2018-11-12 19:31:08,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:08,168 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:31:08,168 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 488 with the following transitions: [2018-11-12 19:31:08,168 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [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], [1658], [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] [2018-11-12 19:31:08,171 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:31:08,171 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:31:08,225 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:31:10,331 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:31:10,332 INFO L272 AbstractInterpreter]: Visited 185 different actions 1284 times. Merged at 8 different actions 58 times. Widened at 1 different actions 3 times. Performed 24177 root evaluator evaluations with a maximum evaluation depth of 6. Performed 24177 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 11 fixpoints after 3 different actions. Largest state had 26 variables. [2018-11-12 19:31:10,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:10,357 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:31:10,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:10,358 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:31:10,369 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:10,370 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:31:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:10,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:31:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 19:31:10,753 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:31:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 19:31:11,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:31:11,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2018-11-12 19:31:11,126 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:31:11,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 19:31:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 19:31:11,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-12 19:31:11,128 INFO L87 Difference]: Start difference. First operand 28383 states and 33637 transitions. Second operand 12 states. [2018-11-12 19:31:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:31:26,965 INFO L93 Difference]: Finished difference Result 76065 states and 91832 transitions. [2018-11-12 19:31:26,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-12 19:31:26,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 487 [2018-11-12 19:31:26,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:31:27,090 INFO L225 Difference]: With dead ends: 76065 [2018-11-12 19:31:27,091 INFO L226 Difference]: Without dead ends: 48129 [2018-11-12 19:31:27,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 1006 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2018-11-12 19:31:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48129 states. [2018-11-12 19:31:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48129 to 45921. [2018-11-12 19:31:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45921 states. [2018-11-12 19:31:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45921 states to 45921 states and 54016 transitions. [2018-11-12 19:31:27,908 INFO L78 Accepts]: Start accepts. Automaton has 45921 states and 54016 transitions. Word has length 487 [2018-11-12 19:31:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:31:27,909 INFO L480 AbstractCegarLoop]: Abstraction has 45921 states and 54016 transitions. [2018-11-12 19:31:27,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 19:31:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 45921 states and 54016 transitions. [2018-11-12 19:31:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2018-11-12 19:31:27,940 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:31:27,940 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:31:27,941 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:31:27,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash -73523263, now seen corresponding path program 1 times [2018-11-12 19:31:27,941 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:31:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:27,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:31:27,942 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:31:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:28,928 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-11-12 19:31:29,129 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-11-12 19:31:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 237 proven. 462 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 19:31:30,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:30,613 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:31:30,613 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 566 with the following transitions: [2018-11-12 19:31:30,613 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [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], [1681], [1686], [1688], [1689], [1693], [1697], [1701], [1705], [1709], [1713], [1717], [1720], [1725], [1727], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:31:30,617 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:31:30,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:31:30,698 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:31:31,669 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:31:31,669 INFO L272 AbstractInterpreter]: Visited 187 different actions 735 times. Merged at 7 different actions 24 times. Never widened. Performed 14592 root evaluator evaluations with a maximum evaluation depth of 6. Performed 14592 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 19:31:31,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:31:31,705 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:31:31,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:31:31,705 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:31:31,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:31:31,717 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:31:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:31:31,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:31:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 540 proven. 55 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-11-12 19:31:33,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:31:33,767 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2018-11-12 19:31:33,828 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 108 [2018-11-12 19:31:34,880 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2018-11-12 19:31:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 239 proven. 460 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-11-12 19:31:36,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:31:36,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2018-11-12 19:31:36,294 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:31:36,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-12 19:31:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-12 19:31:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2018-11-12 19:31:36,295 INFO L87 Difference]: Start difference. First operand 45921 states and 54016 transitions. Second operand 22 states. [2018-11-12 19:31:39,821 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-11-12 19:31:40,094 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2018-11-12 19:31:41,952 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2018-11-12 19:31:44,625 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2018-11-12 19:31:46,915 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2018-11-12 19:31:49,803 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2018-11-12 19:31:51,588 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2018-11-12 19:31:52,352 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2018-11-12 19:31:53,019 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2018-11-12 19:31:53,969 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2018-11-12 19:31:54,902 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2018-11-12 19:31:56,209 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2018-11-12 19:32:01,830 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2018-11-12 19:32:07,310 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2018-11-12 19:32:09,315 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2018-11-12 19:32:11,920 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-11-12 19:32:13,022 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-11-12 19:32:13,784 WARN L179 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-11-12 19:32:14,301 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2018-11-12 19:32:16,263 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2018-11-12 19:32:24,606 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2018-11-12 19:32:29,553 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2018-11-12 19:32:46,577 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2018-11-12 19:32:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 19:32:52,364 INFO L93 Difference]: Finished difference Result 160137 states and 207540 transitions. [2018-11-12 19:32:52,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-11-12 19:32:52,365 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 565 [2018-11-12 19:32:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 19:32:52,943 INFO L225 Difference]: With dead ends: 160137 [2018-11-12 19:32:52,943 INFO L226 Difference]: Without dead ends: 107766 [2018-11-12 19:32:53,167 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 1212 SyntacticMatches, 12 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12323 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=4895, Invalid=26611, Unknown=0, NotChecked=0, Total=31506 [2018-11-12 19:32:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107766 states. [2018-11-12 19:32:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107766 to 99086. [2018-11-12 19:32:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99086 states. [2018-11-12 19:32:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99086 states to 99086 states and 122014 transitions. [2018-11-12 19:32:56,494 INFO L78 Accepts]: Start accepts. Automaton has 99086 states and 122014 transitions. Word has length 565 [2018-11-12 19:32:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 19:32:56,495 INFO L480 AbstractCegarLoop]: Abstraction has 99086 states and 122014 transitions. [2018-11-12 19:32:56,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-12 19:32:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 99086 states and 122014 transitions. [2018-11-12 19:32:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2018-11-12 19:32:56,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 19:32:56,534 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 19:32:56,534 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 19:32:56,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:32:56,535 INFO L82 PathProgramCache]: Analyzing trace with hash -735551284, now seen corresponding path program 1 times [2018-11-12 19:32:56,535 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 19:32:56,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:56,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:32:56,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 19:32:56,536 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 19:32:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:32:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 604 proven. 71 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2018-11-12 19:32:57,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:32:57,586 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 19:32:57,586 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 608 with the following transitions: [2018-11-12 19:32:57,586 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], [958], [966], [974], [982], [990], [998], [1006], [1014], [1022], [1030], [1038], [1046], [1054], [1062], [1070], [1078], [1086], [1094], [1102], [1110], [1114], [1116], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1211], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1278], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1385], [1389], [1393], [1397], [1401], [1405], [1409], [1413], [1417], [1428], [1432], [1436], [1440], [1451], [1455], [1459], [1463], [1467], [1471], [1475], [1478], [1479], [1490], [1501], [1505], [1516], [1520], [1524], [1528], [1532], [1536], [1540], [1544], [1548], [1559], [1563], [1567], [1578], [1582], [1593], [1597], [1601], [1612], [1623], [1627], [1631], [1635], [1639], [1643], [1647], [1651], [1655], [1659], [1663], [1667], [1678], [1681], [1686], [1688], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 19:32:57,589 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 19:32:57,590 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 19:32:57,644 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 19:33:00,035 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 19:33:00,035 INFO L272 AbstractInterpreter]: Visited 179 different actions 1261 times. Merged at 10 different actions 77 times. Widened at 1 different actions 2 times. Performed 23185 root evaluator evaluations with a maximum evaluation depth of 6. Performed 23185 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 24 fixpoints after 2 different actions. Largest state had 26 variables. [2018-11-12 19:33:00,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 19:33:00,068 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 19:33:00,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 19:33:00,068 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 19:33:00,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 19:33:00,082 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 19:33:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 19:33:00,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 19:33:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 820 proven. 2 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2018-11-12 19:33:00,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 19:33:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 604 proven. 71 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2018-11-12 19:33:00,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 19:33:00,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2018-11-12 19:33:00,887 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 19:33:00,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 19:33:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 19:33:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-11-12 19:33:00,888 INFO L87 Difference]: Start difference. First operand 99086 states and 122014 transitions. Second operand 8 states. Received shutdown request... [2018-11-12 19:33:05,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 19:33:05,895 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 19:33:05,902 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 19:33:05,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 07:33:05 BoogieIcfgContainer [2018-11-12 19:33:05,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 19:33:05,903 INFO L168 Benchmark]: Toolchain (without parser) took 224591.43 ms. Allocated memory was 1.5 GB in the beginning and 3.8 GB in the end (delta: 2.3 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 914.6 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,904 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. [2018-11-12 19:33:05,904 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1550.61 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: 140.1 MB). Peak memory consumption was 140.1 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 282.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -965.5 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,906 INFO L168 Benchmark]: Boogie Preprocessor took 246.66 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: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,907 INFO L168 Benchmark]: RCFGBuilder took 8546.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 455.9 MB). Peak memory consumption was 455.9 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,908 INFO L168 Benchmark]: TraceAbstraction took 213959.95 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.8 GB in the end (delta: -1.0 GB). Peak memory consumption was 487.6 MB. Max. memory is 7.1 GB. [2018-11-12 19:33:05,917 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 1550.61 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: 140.1 MB). Peak memory consumption was 140.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 282.68 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 782.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -965.5 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 246.66 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: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8546.51 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 455.9 MB). Peak memory consumption was 455.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 213959.95 ms. Allocated memory was 2.3 GB in the beginning and 3.8 GB in the end (delta: 1.5 GB). Free memory was 1.8 GB in the beginning and 2.8 GB in the end (delta: -1.0 GB). Peak memory consumption was 487.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 176]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 176). Cancelled while BasicCegarLoop was constructing difference of abstraction (99086states) and FLOYD_HOARE automaton (currently 13 states, 8 states before enhancement),while ReachableStatesComputation was computing reachable states (23540 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 213.8s OverallTime, 10 OverallIterations, 6 TraceHistogramMax, 161.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2484 SDtfs, 47810 SDslu, 5248 SDs, 0 SdLazy, 86551 SolverSat, 13256 SolverUnsat, 397 SolverUnknown, 0 SolverNotchecked, 120.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6976 GetRequests, 6584 SyntacticMatches, 32 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14692 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99086occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 12.9s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 6.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 13056 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 28.5s InterpolantComputationTime, 6684 NumberOfCodeBlocks, 6684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 9901 ConstructedInterpolants, 611 QuantifiedInterpolants, 26684099 SizeOfPredicates, 32 NumberOfNonLiveVariables, 5071 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 9804/11588 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown