java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label53_true-unreach-call_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 20:38:39,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 20:38:39,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 20:38:39,245 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 20:38:39,246 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 20:38:39,247 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 20:38:39,248 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 20:38:39,250 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 20:38:39,252 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 20:38:39,253 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 20:38:39,253 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 20:38:39,254 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 20:38:39,255 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 20:38:39,256 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 20:38:39,259 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 20:38:39,260 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 20:38:39,260 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 20:38:39,268 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 20:38:39,273 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 20:38:39,275 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 20:38:39,276 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 20:38:39,280 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 20:38:39,285 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 20:38:39,285 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 20:38:39,288 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 20:38:39,289 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 20:38:39,290 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 20:38:39,291 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 20:38:39,295 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 20:38:39,296 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 20:38:39,296 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 20:38:39,299 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 20:38:39,299 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 20:38:39,300 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 20:38:39,301 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 20:38:39,301 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 20:38:39,303 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-07 20:38:39,331 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 20:38:39,332 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 20:38:39,333 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 20:38:39,333 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 20:38:39,334 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 20:38:39,337 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 20:38:39,337 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 20:38:39,338 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 20:38:39,339 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 20:38:39,339 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 20:38:39,341 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 20:38:39,341 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 20:38:39,341 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 20:38:39,341 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 20:38:39,342 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 20:38:39,342 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 20:38:39,342 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 20:38:39,342 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 20:38:39,342 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 20:38:39,342 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 20:38:39,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:38:39,344 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 20:38:39,344 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 20:38:39,344 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 20:38:39,345 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 20:38:39,345 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 20:38:39,346 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 20:38:39,346 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 20:38:39,346 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 20:38:39,346 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 20:38:39,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 20:38:39,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 20:38:39,424 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 20:38:39,425 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 20:38:39,426 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 20:38:39,427 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label53_true-unreach-call_false-termination.c [2018-11-07 20:38:39,483 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a2ed4/ed8e2d7ad2d349bfbca2633f5e680b98/FLAGb6228fe95 [2018-11-07 20:38:40,073 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 20:38:40,074 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label53_true-unreach-call_false-termination.c [2018-11-07 20:38:40,088 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a2ed4/ed8e2d7ad2d349bfbca2633f5e680b98/FLAGb6228fe95 [2018-11-07 20:38:40,105 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1680a2ed4/ed8e2d7ad2d349bfbca2633f5e680b98 [2018-11-07 20:38:40,119 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 20:38:40,121 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 20:38:40,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 20:38:40,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 20:38:40,126 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 20:38:40,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:40,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eddc215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40, skipping insertion in model container [2018-11-07 20:38:40,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:40,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 20:38:40,218 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 20:38:40,767 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:38:40,772 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 20:38:40,920 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 20:38:40,941 INFO L193 MainTranslator]: Completed translation [2018-11-07 20:38:40,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40 WrapperNode [2018-11-07 20:38:40,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 20:38:40,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 20:38:40,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 20:38:40,943 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 20:38:40,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 20:38:41,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 20:38:41,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 20:38:41,096 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 20:38:41,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... [2018-11-07 20:38:41,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 20:38:41,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 20:38:41,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 20:38:41,224 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 20:38:41,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 20:38:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 20:38:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 20:38:41,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 20:38:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 20:38:41,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 20:38:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 20:38:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 20:38:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 20:38:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 20:38:45,214 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 20:38:45,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:45 BoogieIcfgContainer [2018-11-07 20:38:45,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 20:38:45,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 20:38:45,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 20:38:45,223 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 20:38:45,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:38:40" (1/3) ... [2018-11-07 20:38:45,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281c9871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:45, skipping insertion in model container [2018-11-07 20:38:45,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:40" (2/3) ... [2018-11-07 20:38:45,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281c9871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:45, skipping insertion in model container [2018-11-07 20:38:45,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:45" (3/3) ... [2018-11-07 20:38:45,228 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label53_true-unreach-call_false-termination.c [2018-11-07 20:38:45,240 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 20:38:45,252 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 20:38:45,274 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 20:38:45,316 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 20:38:45,316 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 20:38:45,316 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 20:38:45,316 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 20:38:45,316 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 20:38:45,317 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 20:38:45,317 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 20:38:45,317 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 20:38:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states. [2018-11-07 20:38:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-07 20:38:45,357 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:45,358 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] [2018-11-07 20:38:45,360 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:45,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1477043892, now seen corresponding path program 1 times [2018-11-07 20:38:45,369 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:45,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:45,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:45,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:45,418 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:45,792 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 20:38:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:38:45,894 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:38:45,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 20:38:45,895 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:45,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 20:38:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 20:38:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:38:45,923 INFO L87 Difference]: Start difference. First operand 255 states. Second operand 3 states. [2018-11-07 20:38:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:47,925 INFO L93 Difference]: Finished difference Result 691 states and 1226 transitions. [2018-11-07 20:38:47,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 20:38:47,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2018-11-07 20:38:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:47,950 INFO L225 Difference]: With dead ends: 691 [2018-11-07 20:38:47,950 INFO L226 Difference]: Without dead ends: 434 [2018-11-07 20:38:47,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 20:38:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2018-11-07 20:38:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2018-11-07 20:38:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2018-11-07 20:38:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 765 transitions. [2018-11-07 20:38:48,044 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 765 transitions. Word has length 56 [2018-11-07 20:38:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:48,045 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 765 transitions. [2018-11-07 20:38:48,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 20:38:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 765 transitions. [2018-11-07 20:38:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-07 20:38:48,054 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:48,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:48,055 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:48,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash 167474839, now seen corresponding path program 1 times [2018-11-07 20:38:48,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:48,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:48,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:48,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:48,058 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:38:48,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:38:48,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 20:38:48,416 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:48,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 20:38:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 20:38:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 20:38:48,419 INFO L87 Difference]: Start difference. First operand 434 states and 765 transitions. Second operand 6 states. [2018-11-07 20:38:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:50,504 INFO L93 Difference]: Finished difference Result 1062 states and 1897 transitions. [2018-11-07 20:38:50,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:38:50,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2018-11-07 20:38:50,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:50,510 INFO L225 Difference]: With dead ends: 1062 [2018-11-07 20:38:50,510 INFO L226 Difference]: Without dead ends: 634 [2018-11-07 20:38:50,512 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 20:38:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2018-11-07 20:38:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 625. [2018-11-07 20:38:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2018-11-07 20:38:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1019 transitions. [2018-11-07 20:38:50,553 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1019 transitions. Word has length 143 [2018-11-07 20:38:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:50,554 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1019 transitions. [2018-11-07 20:38:50,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 20:38:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1019 transitions. [2018-11-07 20:38:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-07 20:38:50,561 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:50,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:50,562 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:50,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1433253212, now seen corresponding path program 1 times [2018-11-07 20:38:50,563 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:50,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:50,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:50,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:50,565 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:38:50,761 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 20:38:50,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-07 20:38:50,762 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:50,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 20:38:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 20:38:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:38:50,763 INFO L87 Difference]: Start difference. First operand 625 states and 1019 transitions. Second operand 4 states. [2018-11-07 20:38:54,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:38:54,646 INFO L93 Difference]: Finished difference Result 2350 states and 4002 transitions. [2018-11-07 20:38:54,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 20:38:54,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2018-11-07 20:38:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:38:54,666 INFO L225 Difference]: With dead ends: 2350 [2018-11-07 20:38:54,666 INFO L226 Difference]: Without dead ends: 1731 [2018-11-07 20:38:54,672 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-07 20:38:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2018-11-07 20:38:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1731. [2018-11-07 20:38:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1731 states. [2018-11-07 20:38:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2678 transitions. [2018-11-07 20:38:54,760 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2678 transitions. Word has length 152 [2018-11-07 20:38:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:38:54,761 INFO L480 AbstractCegarLoop]: Abstraction has 1731 states and 2678 transitions. [2018-11-07 20:38:54,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 20:38:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2678 transitions. [2018-11-07 20:38:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-11-07 20:38:54,770 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:38:54,771 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:38:54,771 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:38:54,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:54,772 INFO L82 PathProgramCache]: Analyzing trace with hash -830750464, now seen corresponding path program 1 times [2018-11-07 20:38:54,772 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:38:54,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:54,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:38:54,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:38:54,773 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:38:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:38:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 20:38:55,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:38:55,664 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:38:55,665 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 257 with the following transitions: [2018-11-07 20:38:55,668 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:38:55,720 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:38:55,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:38:56,366 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:38:56,369 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:38:56,370 INFO L272 AbstractInterpreter]: Visited 118 different actions 118 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 20:38:56,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:38:56,418 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:38:56,969 INFO L227 lantSequenceWeakener]: Weakened 247 states. On average, predicates are now at 77.96% of their original sizes. [2018-11-07 20:38:56,969 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:38:57,342 INFO L415 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2018-11-07 20:38:57,343 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:38:57,344 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:38:57,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2018-11-07 20:38:57,344 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:38:57,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-07 20:38:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-07 20:38:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-07 20:38:57,346 INFO L87 Difference]: Start difference. First operand 1731 states and 2678 transitions. Second operand 7 states. [2018-11-07 20:39:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:10,817 INFO L93 Difference]: Finished difference Result 3641 states and 5641 transitions. [2018-11-07 20:39:10,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 20:39:10,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2018-11-07 20:39:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:10,829 INFO L225 Difference]: With dead ends: 3641 [2018-11-07 20:39:10,829 INFO L226 Difference]: Without dead ends: 1916 [2018-11-07 20:39:10,838 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-07 20:39:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2018-11-07 20:39:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1914. [2018-11-07 20:39:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1914 states. [2018-11-07 20:39:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 2869 transitions. [2018-11-07 20:39:10,890 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 2869 transitions. Word has length 256 [2018-11-07 20:39:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:10,890 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 2869 transitions. [2018-11-07 20:39:10,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-07 20:39:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 2869 transitions. [2018-11-07 20:39:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-11-07 20:39:10,900 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:10,900 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:10,901 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:10,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1183303121, now seen corresponding path program 1 times [2018-11-07 20:39:10,901 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:10,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:10,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:10,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:10,903 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:11,389 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:11,580 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:39:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 235 proven. 164 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:12,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:12,298 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:12,299 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 342 with the following transitions: [2018-11-07 20:39:12,299 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:12,305 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:12,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:12,436 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:12,540 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:12,541 INFO L272 AbstractInterpreter]: Visited 122 different actions 237 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:12,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:12,579 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:13,358 INFO L227 lantSequenceWeakener]: Weakened 150 states. On average, predicates are now at 77.82% of their original sizes. [2018-11-07 20:39:13,358 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:15,141 INFO L415 sIntCurrentIteration]: We unified 340 AI predicates to 340 [2018-11-07 20:39:15,141 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:15,141 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:15,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [23] imperfect sequences [12] total 33 [2018-11-07 20:39:15,142 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:15,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-07 20:39:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-07 20:39:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2018-11-07 20:39:15,143 INFO L87 Difference]: Start difference. First operand 1914 states and 2869 transitions. Second operand 23 states. [2018-11-07 20:39:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:37,027 INFO L93 Difference]: Finished difference Result 4794 states and 6936 transitions. [2018-11-07 20:39:37,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:39:37,027 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 341 [2018-11-07 20:39:37,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:37,042 INFO L225 Difference]: With dead ends: 4794 [2018-11-07 20:39:37,042 INFO L226 Difference]: Without dead ends: 2284 [2018-11-07 20:39:37,053 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 350 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2018-11-07 20:39:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2018-11-07 20:39:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2282. [2018-11-07 20:39:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2282 states. [2018-11-07 20:39:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3245 transitions. [2018-11-07 20:39:37,129 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3245 transitions. Word has length 341 [2018-11-07 20:39:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:37,130 INFO L480 AbstractCegarLoop]: Abstraction has 2282 states and 3245 transitions. [2018-11-07 20:39:37,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-07 20:39:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3245 transitions. [2018-11-07 20:39:37,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2018-11-07 20:39:37,144 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:37,144 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:37,145 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:37,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -324101989, now seen corresponding path program 1 times [2018-11-07 20:39:37,145 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:37,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:37,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:37,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:37,146 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 160 proven. 267 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:38,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:38,273 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:38,273 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 368 with the following transitions: [2018-11-07 20:39:38,274 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:38,278 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:38,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:38,348 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:38,416 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:38,416 INFO L272 AbstractInterpreter]: Visited 122 different actions 238 times. Merged at 5 different actions 5 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:38,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:38,422 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:38,802 INFO L227 lantSequenceWeakener]: Weakened 142 states. On average, predicates are now at 78.84% of their original sizes. [2018-11-07 20:39:38,802 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:39,171 INFO L415 sIntCurrentIteration]: We unified 366 AI predicates to 366 [2018-11-07 20:39:39,172 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:39,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:39,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2018-11-07 20:39:39,173 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:39,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-07 20:39:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-07 20:39:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-11-07 20:39:39,174 INFO L87 Difference]: Start difference. First operand 2282 states and 3245 transitions. Second operand 21 states. [2018-11-07 20:39:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:39:49,412 INFO L93 Difference]: Finished difference Result 4380 states and 6518 transitions. [2018-11-07 20:39:49,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:39:49,412 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2018-11-07 20:39:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:39:49,424 INFO L225 Difference]: With dead ends: 4380 [2018-11-07 20:39:49,425 INFO L226 Difference]: Without dead ends: 2655 [2018-11-07 20:39:49,434 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 384 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2018-11-07 20:39:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-11-07 20:39:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2650. [2018-11-07 20:39:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2650 states. [2018-11-07 20:39:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3641 transitions. [2018-11-07 20:39:49,503 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3641 transitions. Word has length 367 [2018-11-07 20:39:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:39:49,503 INFO L480 AbstractCegarLoop]: Abstraction has 2650 states and 3641 transitions. [2018-11-07 20:39:49,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-07 20:39:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3641 transitions. [2018-11-07 20:39:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2018-11-07 20:39:49,515 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:39:49,516 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:39:49,516 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:39:49,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:49,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2017815001, now seen corresponding path program 1 times [2018-11-07 20:39:49,517 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:39:49,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:49,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:39:49,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:39:49,518 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:39:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:39:49,964 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:50,174 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-07 20:39:50,415 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:39:50,886 WARN L179 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-11-07 20:39:51,414 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-11-07 20:39:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 263 proven. 166 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:39:52,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:39:52,223 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:39:52,223 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 378 with the following transitions: [2018-11-07 20:39:52,224 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [698], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:39:52,229 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:39:52,229 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:39:52,358 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:39:52,548 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:39:52,548 INFO L272 AbstractInterpreter]: Visited 130 different actions 256 times. Merged at 5 different actions 7 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:39:52,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:39:52,571 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:39:53,021 INFO L227 lantSequenceWeakener]: Weakened 88 states. On average, predicates are now at 78.2% of their original sizes. [2018-11-07 20:39:53,021 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:39:53,611 INFO L415 sIntCurrentIteration]: We unified 376 AI predicates to 376 [2018-11-07 20:39:53,611 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:39:53,612 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:39:53,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [18] imperfect sequences [12] total 28 [2018-11-07 20:39:53,612 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:39:53,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-07 20:39:53,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-07 20:39:53,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2018-11-07 20:39:53,614 INFO L87 Difference]: Start difference. First operand 2650 states and 3641 transitions. Second operand 18 states. [2018-11-07 20:40:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:11,591 INFO L93 Difference]: Finished difference Result 5350 states and 7519 transitions. [2018-11-07 20:40:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-07 20:40:11,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 377 [2018-11-07 20:40:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:11,605 INFO L225 Difference]: With dead ends: 5350 [2018-11-07 20:40:11,605 INFO L226 Difference]: Without dead ends: 2840 [2018-11-07 20:40:11,613 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 384 GetRequests, 354 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-11-07 20:40:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-07 20:40:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-07 20:40:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:40:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3642 transitions. [2018-11-07 20:40:11,685 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3642 transitions. Word has length 377 [2018-11-07 20:40:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:11,686 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3642 transitions. [2018-11-07 20:40:11,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-07 20:40:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3642 transitions. [2018-11-07 20:40:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-11-07 20:40:11,699 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:11,699 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:11,700 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:11,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -609602292, now seen corresponding path program 1 times [2018-11-07 20:40:11,700 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:11,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:11,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:11,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:11,702 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 247 proven. 182 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:40:13,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:13,137 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:13,137 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 403 with the following transitions: [2018-11-07 20:40:13,137 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [798], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:13,141 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:13,142 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:13,211 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:13,397 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:13,398 INFO L272 AbstractInterpreter]: Visited 155 different actions 303 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:40:13,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:13,433 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:13,912 INFO L227 lantSequenceWeakener]: Weakened 92 states. On average, predicates are now at 78.16% of their original sizes. [2018-11-07 20:40:13,912 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:14,355 INFO L415 sIntCurrentIteration]: We unified 401 AI predicates to 401 [2018-11-07 20:40:14,355 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:14,355 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:14,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [13] total 31 [2018-11-07 20:40:14,356 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:14,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:40:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:40:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:40:14,358 INFO L87 Difference]: Start difference. First operand 2652 states and 3642 transitions. Second operand 20 states. [2018-11-07 20:40:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:40:37,927 INFO L93 Difference]: Finished difference Result 5350 states and 7519 transitions. [2018-11-07 20:40:37,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:40:37,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 402 [2018-11-07 20:40:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:40:37,939 INFO L225 Difference]: With dead ends: 5350 [2018-11-07 20:40:37,939 INFO L226 Difference]: Without dead ends: 2840 [2018-11-07 20:40:37,948 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 411 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:40:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-07 20:40:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-07 20:40:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:40:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3642 transitions. [2018-11-07 20:40:38,013 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3642 transitions. Word has length 402 [2018-11-07 20:40:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:40:38,013 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3642 transitions. [2018-11-07 20:40:38,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:40:38,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3642 transitions. [2018-11-07 20:40:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2018-11-07 20:40:38,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:40:38,027 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:40:38,028 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:40:38,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash 553325371, now seen corresponding path program 1 times [2018-11-07 20:40:38,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:40:38,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:38,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:40:38,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:40:38,030 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:40:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:40:38,482 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-07 20:40:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 234 proven. 195 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:40:39,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:40:39,582 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:40:39,582 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 416 with the following transitions: [2018-11-07 20:40:39,582 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [850], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:40:39,587 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:40:39,587 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:40:39,647 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:40:39,822 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:40:39,823 INFO L272 AbstractInterpreter]: Visited 168 different actions 329 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:40:39,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:40:39,829 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:40:40,388 INFO L227 lantSequenceWeakener]: Weakened 90 states. On average, predicates are now at 78.18% of their original sizes. [2018-11-07 20:40:40,388 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:40:40,969 INFO L415 sIntCurrentIteration]: We unified 414 AI predicates to 414 [2018-11-07 20:40:40,969 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:40:40,969 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:40:40,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [12] total 30 [2018-11-07 20:40:40,970 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:40:40,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:40:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:40:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:40:40,971 INFO L87 Difference]: Start difference. First operand 2652 states and 3642 transitions. Second operand 20 states. [2018-11-07 20:41:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:06,116 INFO L93 Difference]: Finished difference Result 5350 states and 7519 transitions. [2018-11-07 20:41:06,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-07 20:41:06,117 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 415 [2018-11-07 20:41:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:06,128 INFO L225 Difference]: With dead ends: 5350 [2018-11-07 20:41:06,128 INFO L226 Difference]: Without dead ends: 2840 [2018-11-07 20:41:06,136 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 424 GetRequests, 392 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:41:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2018-11-07 20:41:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2652. [2018-11-07 20:41:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2018-11-07 20:41:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3642 transitions. [2018-11-07 20:41:06,202 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3642 transitions. Word has length 415 [2018-11-07 20:41:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:06,202 INFO L480 AbstractCegarLoop]: Abstraction has 2652 states and 3642 transitions. [2018-11-07 20:41:06,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:41:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3642 transitions. [2018-11-07 20:41:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-11-07 20:41:06,215 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:06,215 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:41:06,216 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:06,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:06,216 INFO L82 PathProgramCache]: Analyzing trace with hash 720011747, now seen corresponding path program 1 times [2018-11-07 20:41:06,216 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:06,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:06,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:06,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:06,217 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 222 proven. 207 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:41:07,653 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:07,653 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:07,653 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 428 with the following transitions: [2018-11-07 20:41:07,653 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [659], [663], [666], [667], [671], [675], [679], [683], [687], [691], [695], [699], [703], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [791], [795], [799], [803], [807], [811], [815], [819], [823], [827], [831], [835], [839], [843], [847], [851], [855], [859], [863], [867], [871], [875], [879], [883], [887], [891], [895], [898], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:07,655 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:07,656 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:07,699 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:07,851 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:41:07,851 INFO L272 AbstractInterpreter]: Visited 180 different actions 353 times. Merged at 4 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2018-11-07 20:41:07,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:07,857 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:41:08,255 INFO L227 lantSequenceWeakener]: Weakened 92 states. On average, predicates are now at 78.16% of their original sizes. [2018-11-07 20:41:08,255 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:41:08,669 INFO L415 sIntCurrentIteration]: We unified 426 AI predicates to 426 [2018-11-07 20:41:08,669 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:41:08,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:41:08,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 32 [2018-11-07 20:41:08,670 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:41:08,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-07 20:41:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-07 20:41:08,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2018-11-07 20:41:08,671 INFO L87 Difference]: Start difference. First operand 2652 states and 3642 transitions. Second operand 20 states. [2018-11-07 20:41:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:31,523 INFO L93 Difference]: Finished difference Result 5348 states and 7517 transitions. [2018-11-07 20:41:31,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-07 20:41:31,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 427 [2018-11-07 20:41:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:31,531 INFO L225 Difference]: With dead ends: 5348 [2018-11-07 20:41:31,532 INFO L226 Difference]: Without dead ends: 2838 [2018-11-07 20:41:31,539 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 436 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-11-07 20:41:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2018-11-07 20:41:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2650. [2018-11-07 20:41:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2650 states. [2018-11-07 20:41:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3640 transitions. [2018-11-07 20:41:31,603 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3640 transitions. Word has length 427 [2018-11-07 20:41:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:31,604 INFO L480 AbstractCegarLoop]: Abstraction has 2650 states and 3640 transitions. [2018-11-07 20:41:31,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-07 20:41:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3640 transitions. [2018-11-07 20:41:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-11-07 20:41:31,614 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:31,615 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-07 20:41:31,615 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:31,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash -165865100, now seen corresponding path program 1 times [2018-11-07 20:41:31,616 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:31,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:31,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:31,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:31,617 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 289 proven. 166 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2018-11-07 20:41:32,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:32,078 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:32,078 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 453 with the following transitions: [2018-11-07 20:41:32,079 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:32,081 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:32,081 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:32,142 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:32,361 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:41:32,361 INFO L272 AbstractInterpreter]: Visited 123 different actions 367 times. Merged at 7 different actions 20 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 24 variables. [2018-11-07 20:41:32,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:32,369 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:41:32,946 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 78.12% of their original sizes. [2018-11-07 20:41:32,946 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:41:33,494 INFO L415 sIntCurrentIteration]: We unified 451 AI predicates to 451 [2018-11-07 20:41:33,494 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:41:33,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:41:33,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [6] total 26 [2018-11-07 20:41:33,495 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:41:33,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:41:33,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:41:33,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2018-11-07 20:41:33,496 INFO L87 Difference]: Start difference. First operand 2650 states and 3640 transitions. Second operand 22 states. [2018-11-07 20:41:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:41:55,223 INFO L93 Difference]: Finished difference Result 5541 states and 7708 transitions. [2018-11-07 20:41:55,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-07 20:41:55,224 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 452 [2018-11-07 20:41:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:41:55,234 INFO L225 Difference]: With dead ends: 5541 [2018-11-07 20:41:55,234 INFO L226 Difference]: Without dead ends: 3031 [2018-11-07 20:41:55,242 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 469 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2018-11-07 20:41:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2018-11-07 20:41:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2840. [2018-11-07 20:41:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2018-11-07 20:41:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3828 transitions. [2018-11-07 20:41:55,303 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3828 transitions. Word has length 452 [2018-11-07 20:41:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:41:55,303 INFO L480 AbstractCegarLoop]: Abstraction has 2840 states and 3828 transitions. [2018-11-07 20:41:55,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 20:41:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3828 transitions. [2018-11-07 20:41:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2018-11-07 20:41:55,313 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:41:55,313 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:41:55,314 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:41:55,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1530347973, now seen corresponding path program 1 times [2018-11-07 20:41:55,314 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:41:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:55,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:41:55,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:41:55,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:41:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:41:56,345 WARN L179 SmtUtils]: Spent 492.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-11-07 20:41:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 307 proven. 432 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:41:56,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:41:56,725 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:41:56,725 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 456 with the following transitions: [2018-11-07 20:41:56,725 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:41:56,727 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:41:56,727 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:41:56,775 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:41:56,918 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:41:56,918 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:41:56,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:41:56,925 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:41:57,359 INFO L227 lantSequenceWeakener]: Weakened 127 states. On average, predicates are now at 77.88% of their original sizes. [2018-11-07 20:41:57,360 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:41:57,879 INFO L415 sIntCurrentIteration]: We unified 454 AI predicates to 454 [2018-11-07 20:41:57,879 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:41:57,880 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:41:57,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [15] total 35 [2018-11-07 20:41:57,880 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:41:57,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:41:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:41:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-11-07 20:41:57,881 INFO L87 Difference]: Start difference. First operand 2840 states and 3828 transitions. Second operand 22 states. [2018-11-07 20:42:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 20:42:14,488 INFO L93 Difference]: Finished difference Result 5423 states and 7559 transitions. [2018-11-07 20:42:14,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-07 20:42:14,488 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 455 [2018-11-07 20:42:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 20:42:14,500 INFO L225 Difference]: With dead ends: 5423 [2018-11-07 20:42:14,501 INFO L226 Difference]: Without dead ends: 3033 [2018-11-07 20:42:14,509 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 470 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2018-11-07 20:42:14,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2018-11-07 20:42:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2658. [2018-11-07 20:42:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2018-11-07 20:42:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3645 transitions. [2018-11-07 20:42:14,573 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3645 transitions. Word has length 455 [2018-11-07 20:42:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 20:42:14,573 INFO L480 AbstractCegarLoop]: Abstraction has 2658 states and 3645 transitions. [2018-11-07 20:42:14,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-07 20:42:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3645 transitions. [2018-11-07 20:42:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-11-07 20:42:14,583 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 20:42:14,583 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 20:42:14,584 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 20:42:14,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:42:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1964389400, now seen corresponding path program 1 times [2018-11-07 20:42:14,584 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 20:42:14,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:42:14,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 20:42:14,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 20:42:14,585 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 20:42:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 20:42:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 326 proven. 451 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-07 20:42:16,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 20:42:16,213 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 20:42:16,213 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 475 with the following transitions: [2018-11-07 20:42:16,213 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [349], [351], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [642], [643], [647], [651], [655], [658], [659], [663], [666], [948], [952], [956], [962], [966], [968], [973], [974], [975], [977], [978] [2018-11-07 20:42:16,215 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 20:42:16,215 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 20:42:16,259 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 20:42:16,446 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 20:42:16,447 INFO L272 AbstractInterpreter]: Visited 123 different actions 364 times. Merged at 7 different actions 17 times. Never widened. Found 3 fixpoints after 2 different actions. Largest state had 24 variables. [2018-11-07 20:42:16,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 20:42:16,458 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 20:42:17,061 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 78.12% of their original sizes. [2018-11-07 20:42:17,062 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 20:42:17,604 INFO L415 sIntCurrentIteration]: We unified 473 AI predicates to 473 [2018-11-07 20:42:17,604 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 20:42:17,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 20:42:17,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [22] imperfect sequences [15] total 35 [2018-11-07 20:42:17,605 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 20:42:17,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-07 20:42:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-07 20:42:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2018-11-07 20:42:17,606 INFO L87 Difference]: Start difference. First operand 2658 states and 3645 transitions. Second operand 22 states. Received shutdown request... [2018-11-07 20:42:29,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-07 20:42:29,957 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-07 20:42:29,963 WARN L205 ceAbstractionStarter]: Timeout [2018-11-07 20:42:29,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:42:29 BoogieIcfgContainer [2018-11-07 20:42:29,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 20:42:29,964 INFO L168 Benchmark]: Toolchain (without parser) took 229844.63 ms. Allocated memory was 1.5 GB in the beginning and 4.8 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -131.0 MB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-11-07 20:42:29,965 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:42:29,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-07 20:42:29,967 INFO L168 Benchmark]: Boogie Procedure Inliner took 152.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -842.9 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2018-11-07 20:42:29,968 INFO L168 Benchmark]: Boogie Preprocessor took 127.24 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 20:42:29,968 INFO L168 Benchmark]: RCFGBuilder took 3992.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.7 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. [2018-11-07 20:42:29,969 INFO L168 Benchmark]: TraceAbstraction took 224746.72 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 539.9 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-11-07 20:42:29,973 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 820.69 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 152.27 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -842.9 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.24 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 3992.43 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 129.7 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224746.72 ms. Allocated memory was 2.3 GB in the beginning and 4.8 GB in the end (delta: 2.5 GB). Free memory was 2.1 GB in the beginning and 1.6 GB in the end (delta: 539.9 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 151]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 151). Cancelled while BasicCegarLoop was constructing difference of abstraction (2658states) and FLOYD_HOARE automaton (currently 31 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (1801 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 255 locations, 1 error locations. TIMEOUT Result, 224.6s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 194.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2616 SDtfs, 37783 SDslu, 2162 SDs, 0 SdLazy, 32623 SolverSat, 3426 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 59.3s Time, PredicateUnifierStatistics: 20 DeclaredPredicates, 4094 GetRequests, 3778 SyntacticMatches, 13 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2840occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.0s AbstIntTime, 10 AbstIntIterations, 10 AbstIntStrong, 0.9973741363924687 AbsIntWeakeningRatio, 0.0839231547017189 AbsIntAvgWeakeningVarsNumRemoved, 12.487866531850354 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 12 MinimizatonAttempts, 1336 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 4317 NumberOfCodeBlocks, 4317 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 4304 ConstructedInterpolants, 0 QuantifiedInterpolants, 17741585 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 2885/5117 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown