java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label07_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 18:35:03,200 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 18:35:03,203 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 18:35:03,220 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 18:35:03,220 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 18:35:03,225 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 18:35:03,226 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 18:35:03,229 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 18:35:03,239 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 18:35:03,241 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 18:35:03,242 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 18:35:03,243 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 18:35:03,244 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 18:35:03,245 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 18:35:03,246 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 18:35:03,247 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 18:35:03,248 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 18:35:03,251 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 18:35:03,256 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 18:35:03,261 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 18:35:03,262 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 18:35:03,265 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 18:35:03,268 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 18:35:03,268 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 18:35:03,269 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 18:35:03,270 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 18:35:03,271 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 18:35:03,271 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 18:35:03,272 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 18:35:03,273 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 18:35:03,273 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 18:35:03,274 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 18:35:03,274 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 18:35:03,275 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 18:35:03,276 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 18:35:03,276 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 18:35:03,277 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 18:35:03,293 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 18:35:03,293 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 18:35:03,294 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 18:35:03,294 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 18:35:03,295 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 18:35:03,295 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 18:35:03,295 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 18:35:03,295 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 18:35:03,295 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 18:35:03,296 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 18:35:03,296 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 18:35:03,296 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 18:35:03,296 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 18:35:03,297 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 18:35:03,297 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 18:35:03,297 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 18:35:03,298 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 18:35:03,298 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 18:35:03,298 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 18:35:03,298 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 18:35:03,299 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 18:35:03,299 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 18:35:03,299 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 18:35:03,299 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 18:35:03,299 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 18:35:03,300 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:35:03,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 18:35:03,300 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 18:35:03,300 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 18:35:03,301 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 18:35:03,301 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 18:35:03,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 18:35:03,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 18:35:03,301 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 18:35:03,302 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 18:35:03,359 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 18:35:03,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 18:35:03,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 18:35:03,380 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 18:35:03,380 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 18:35:03,381 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label07_true-unreach-call.c [2018-11-12 18:35:03,446 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad5b9774/8113e962fb6140a3be9cebe5253c3fa0/FLAG877e61c19 [2018-11-12 18:35:04,078 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 18:35:04,083 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label07_true-unreach-call.c [2018-11-12 18:35:04,098 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad5b9774/8113e962fb6140a3be9cebe5253c3fa0/FLAG877e61c19 [2018-11-12 18:35:04,114 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bad5b9774/8113e962fb6140a3be9cebe5253c3fa0 [2018-11-12 18:35:04,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 18:35:04,131 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 18:35:04,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 18:35:04,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 18:35:04,137 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 18:35:04,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c33c096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:04, skipping insertion in model container [2018-11-12 18:35:04,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 06:35:04" (1/1) ... [2018-11-12 18:35:04,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 18:35:04,232 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 18:35:04,876 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:35:04,881 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 18:35:05,134 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 18:35:05,156 INFO L193 MainTranslator]: Completed translation [2018-11-12 18:35:05,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05 WrapperNode [2018-11-12 18:35:05,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 18:35:05,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 18:35:05,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 18:35:05,158 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 18:35:05,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 18:35:05,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 18:35:05,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 18:35:05,338 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 18:35:05,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... [2018-11-12 18:35:05,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 18:35:05,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 18:35:05,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 18:35:05,466 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 18:35:05,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 18:35:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 18:35:05,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 18:35:05,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 18:35:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 18:35:05,531 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 18:35:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 18:35:05,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 18:35:05,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 18:35:05,532 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 18:35:09,794 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 18:35:09,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:35:09 BoogieIcfgContainer [2018-11-12 18:35:09,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 18:35:09,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 18:35:09,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 18:35:09,799 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 18:35:09,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 06:35:04" (1/3) ... [2018-11-12 18:35:09,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181964cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:35:09, skipping insertion in model container [2018-11-12 18:35:09,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 06:35:05" (2/3) ... [2018-11-12 18:35:09,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181964cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 06:35:09, skipping insertion in model container [2018-11-12 18:35:09,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 06:35:09" (3/3) ... [2018-11-12 18:35:09,804 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label07_true-unreach-call.c [2018-11-12 18:35:09,814 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 18:35:09,824 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 18:35:09,843 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 18:35:09,883 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 18:35:09,884 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 18:35:09,884 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 18:35:09,884 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 18:35:09,884 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 18:35:09,884 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 18:35:09,885 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 18:35:09,885 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 18:35:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states. [2018-11-12 18:35:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-12 18:35:09,923 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:09,924 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] [2018-11-12 18:35:09,927 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:09,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 816116164, now seen corresponding path program 1 times [2018-11-12 18:35:09,935 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:09,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:09,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:09,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:09,992 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:10,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:35:10,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:35:10,466 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:10,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:35:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:35:10,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:35:10,498 INFO L87 Difference]: Start difference. First operand 293 states. Second operand 4 states. [2018-11-12 18:35:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:13,670 INFO L93 Difference]: Finished difference Result 985 states and 1761 transitions. [2018-11-12 18:35:13,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:35:13,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-11-12 18:35:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:13,708 INFO L225 Difference]: With dead ends: 985 [2018-11-12 18:35:13,708 INFO L226 Difference]: Without dead ends: 686 [2018-11-12 18:35:13,718 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:35:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2018-11-12 18:35:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2018-11-12 18:35:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2018-11-12 18:35:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1046 transitions. [2018-11-12 18:35:13,824 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1046 transitions. Word has length 30 [2018-11-12 18:35:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:13,824 INFO L480 AbstractCegarLoop]: Abstraction has 686 states and 1046 transitions. [2018-11-12 18:35:13,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:35:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1046 transitions. [2018-11-12 18:35:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-12 18:35:13,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:13,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:13,832 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:13,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:13,833 INFO L82 PathProgramCache]: Analyzing trace with hash -348576157, now seen corresponding path program 1 times [2018-11-12 18:35:13,833 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:13,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:13,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:13,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:13,837 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:14,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:35:14,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-12 18:35:14,185 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:14,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 18:35:14,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 18:35:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-12 18:35:14,188 INFO L87 Difference]: Start difference. First operand 686 states and 1046 transitions. Second operand 6 states. [2018-11-12 18:35:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:19,295 INFO L93 Difference]: Finished difference Result 2339 states and 3735 transitions. [2018-11-12 18:35:19,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:35:19,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2018-11-12 18:35:19,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:19,319 INFO L225 Difference]: With dead ends: 2339 [2018-11-12 18:35:19,319 INFO L226 Difference]: Without dead ends: 1659 [2018-11-12 18:35:19,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:35:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2018-11-12 18:35:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1642. [2018-11-12 18:35:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1642 states. [2018-11-12 18:35:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2355 transitions. [2018-11-12 18:35:19,415 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2355 transitions. Word has length 111 [2018-11-12 18:35:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:19,416 INFO L480 AbstractCegarLoop]: Abstraction has 1642 states and 2355 transitions. [2018-11-12 18:35:19,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 18:35:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2355 transitions. [2018-11-12 18:35:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-12 18:35:19,430 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:19,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:19,430 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:19,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:19,431 INFO L82 PathProgramCache]: Analyzing trace with hash -786366209, now seen corresponding path program 1 times [2018-11-12 18:35:19,431 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:19,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:19,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:19,432 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:20,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:20,047 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:20,048 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 163 with the following transitions: [2018-11-12 18:35:20,050 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:20,100 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:20,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:20,793 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:22,019 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:35:22,020 INFO L272 AbstractInterpreter]: Visited 140 different actions 406 times. Merged at 5 different actions 9 times. Never widened. Performed 6222 root evaluator evaluations with a maximum evaluation depth of 6. Performed 6222 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:35:22,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:22,067 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:35:22,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:22,067 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:35:22,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:22,086 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:35:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:22,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:35:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:22,471 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:35:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:23,047 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:35:23,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2018-11-12 18:35:23,048 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:23,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:35:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:35:23,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-12 18:35:23,052 INFO L87 Difference]: Start difference. First operand 1642 states and 2355 transitions. Second operand 3 states. [2018-11-12 18:35:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:26,008 INFO L93 Difference]: Finished difference Result 4074 states and 5990 transitions. [2018-11-12 18:35:26,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:35:26,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-11-12 18:35:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:26,033 INFO L225 Difference]: With dead ends: 4074 [2018-11-12 18:35:26,033 INFO L226 Difference]: Without dead ends: 2438 [2018-11-12 18:35:26,041 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-12 18:35:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2018-11-12 18:35:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2433. [2018-11-12 18:35:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2433 states. [2018-11-12 18:35:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 3358 transitions. [2018-11-12 18:35:26,123 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 3358 transitions. Word has length 162 [2018-11-12 18:35:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:26,124 INFO L480 AbstractCegarLoop]: Abstraction has 2433 states and 3358 transitions. [2018-11-12 18:35:26,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:35:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 3358 transitions. [2018-11-12 18:35:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-11-12 18:35:26,128 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:26,129 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:35:26,129 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:26,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash 108502548, now seen corresponding path program 1 times [2018-11-12 18:35:26,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:26,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:26,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:26,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:26,131 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:26,487 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-12 18:35:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 46 proven. 68 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 18:35:26,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:26,911 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:26,912 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 185 with the following transitions: [2018-11-12 18:35:26,912 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [538], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:26,919 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:26,920 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:27,054 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:35:27,055 INFO L272 AbstractInterpreter]: Visited 86 different actions 86 times. Never merged. Never widened. Performed 898 root evaluator evaluations with a maximum evaluation depth of 6. Performed 898 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 28 variables. [2018-11-12 18:35:27,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:27,092 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:35:27,541 INFO L227 lantSequenceWeakener]: Weakened 175 states. On average, predicates are now at 73.17% of their original sizes. [2018-11-12 18:35:27,542 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:35:27,899 INFO L415 sIntCurrentIteration]: We unified 183 AI predicates to 183 [2018-11-12 18:35:27,899 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:35:27,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:35:27,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2018-11-12 18:35:27,900 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:27,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:35:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:35:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-12 18:35:27,902 INFO L87 Difference]: Start difference. First operand 2433 states and 3358 transitions. Second operand 7 states. [2018-11-12 18:35:30,600 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:44,452 INFO L93 Difference]: Finished difference Result 5052 states and 6930 transitions. [2018-11-12 18:35:44,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:35:44,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 184 [2018-11-12 18:35:44,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:44,465 INFO L225 Difference]: With dead ends: 5052 [2018-11-12 18:35:44,465 INFO L226 Difference]: Without dead ends: 2625 [2018-11-12 18:35:44,472 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:35:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2018-11-12 18:35:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2623. [2018-11-12 18:35:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2623 states. [2018-11-12 18:35:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 3557 transitions. [2018-11-12 18:35:44,535 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 3557 transitions. Word has length 184 [2018-11-12 18:35:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:44,536 INFO L480 AbstractCegarLoop]: Abstraction has 2623 states and 3557 transitions. [2018-11-12 18:35:44,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:35:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 3557 transitions. [2018-11-12 18:35:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-11-12 18:35:44,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:44,540 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:35:44,541 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:44,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash -476719494, now seen corresponding path program 1 times [2018-11-12 18:35:44,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:44,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:44,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:44,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:44,543 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-11-12 18:35:44,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 18:35:44,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 18:35:44,854 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 18:35:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 18:35:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:35:44,855 INFO L87 Difference]: Start difference. First operand 2623 states and 3557 transitions. Second operand 4 states. [2018-11-12 18:35:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:48,760 INFO L93 Difference]: Finished difference Result 8969 states and 12816 transitions. [2018-11-12 18:35:48,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 18:35:48,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2018-11-12 18:35:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:48,810 INFO L225 Difference]: With dead ends: 8969 [2018-11-12 18:35:48,811 INFO L226 Difference]: Without dead ends: 6542 [2018-11-12 18:35:48,828 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 18:35:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6542 states. [2018-11-12 18:35:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6542 to 5943. [2018-11-12 18:35:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5943 states. [2018-11-12 18:35:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 8054 transitions. [2018-11-12 18:35:48,996 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 8054 transitions. Word has length 228 [2018-11-12 18:35:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:48,997 INFO L480 AbstractCegarLoop]: Abstraction has 5943 states and 8054 transitions. [2018-11-12 18:35:48,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 18:35:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 8054 transitions. [2018-11-12 18:35:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-11-12 18:35:49,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:49,006 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:35:49,006 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:49,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1938686927, now seen corresponding path program 1 times [2018-11-12 18:35:49,007 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:49,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:49,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:49,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:49,008 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-12 18:35:49,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:49,611 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:49,612 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 268 with the following transitions: [2018-11-12 18:35:49,612 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:49,617 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:49,617 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:49,727 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:50,366 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:35:50,366 INFO L272 AbstractInterpreter]: Visited 141 different actions 551 times. Merged at 7 different actions 21 times. Never widened. Performed 8686 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8686 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:35:50,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:50,374 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:35:50,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:50,374 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:35:50,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:50,385 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:35:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:50,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:35:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-11-12 18:35:50,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:35:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 18:35:51,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:35:51,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2018-11-12 18:35:51,373 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:35:51,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 18:35:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 18:35:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-11-12 18:35:51,374 INFO L87 Difference]: Start difference. First operand 5943 states and 8054 transitions. Second operand 9 states. [2018-11-12 18:35:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:35:56,492 INFO L93 Difference]: Finished difference Result 19368 states and 28683 transitions. [2018-11-12 18:35:56,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-12 18:35:56,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 267 [2018-11-12 18:35:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:35:56,600 INFO L225 Difference]: With dead ends: 19368 [2018-11-12 18:35:56,603 INFO L226 Difference]: Without dead ends: 13621 [2018-11-12 18:35:56,646 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2018-11-12 18:35:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2018-11-12 18:35:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 13019. [2018-11-12 18:35:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13019 states. [2018-11-12 18:35:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 18576 transitions. [2018-11-12 18:35:57,073 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 18576 transitions. Word has length 267 [2018-11-12 18:35:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:35:57,074 INFO L480 AbstractCegarLoop]: Abstraction has 13019 states and 18576 transitions. [2018-11-12 18:35:57,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 18:35:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 18576 transitions. [2018-11-12 18:35:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-11-12 18:35:57,101 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:35:57,101 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:35:57,101 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:35:57,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:57,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1634824326, now seen corresponding path program 1 times [2018-11-12 18:35:57,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:35:57,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:57,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:35:57,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:35:57,104 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:35:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:35:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 145 proven. 72 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-11-12 18:35:57,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:35:57,440 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:35:57,440 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 326 with the following transitions: [2018-11-12 18:35:57,441 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [710], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:35:57,445 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:35:57,445 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:35:57,550 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:35:57,666 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-12 18:35:57,667 INFO L272 AbstractInterpreter]: Visited 126 different actions 246 times. Merged at 5 different actions 5 times. Never widened. Performed 2997 root evaluator evaluations with a maximum evaluation depth of 6. Performed 2997 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2018-11-12 18:35:57,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:35:57,672 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-12 18:35:58,257 INFO L227 lantSequenceWeakener]: Weakened 322 states. On average, predicates are now at 73.19% of their original sizes. [2018-11-12 18:35:58,257 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-12 18:35:58,958 INFO L415 sIntCurrentIteration]: We unified 324 AI predicates to 324 [2018-11-12 18:35:58,958 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-12 18:35:58,959 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-12 18:35:58,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2018-11-12 18:35:58,959 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:35:58,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-12 18:35:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-12 18:35:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-11-12 18:35:58,960 INFO L87 Difference]: Start difference. First operand 13019 states and 18576 transitions. Second operand 11 states. [2018-11-12 18:36:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:17,374 INFO L93 Difference]: Finished difference Result 25848 states and 37011 transitions. [2018-11-12 18:36:17,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 18:36:17,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 325 [2018-11-12 18:36:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:17,433 INFO L225 Difference]: With dead ends: 25848 [2018-11-12 18:36:17,433 INFO L226 Difference]: Without dead ends: 13214 [2018-11-12 18:36:17,484 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 333 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2018-11-12 18:36:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13214 states. [2018-11-12 18:36:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13214 to 13210. [2018-11-12 18:36:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13210 states. [2018-11-12 18:36:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13210 states to 13210 states and 18787 transitions. [2018-11-12 18:36:17,814 INFO L78 Accepts]: Start accepts. Automaton has 13210 states and 18787 transitions. Word has length 325 [2018-11-12 18:36:17,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:17,815 INFO L480 AbstractCegarLoop]: Abstraction has 13210 states and 18787 transitions. [2018-11-12 18:36:17,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-12 18:36:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 13210 states and 18787 transitions. [2018-11-12 18:36:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-11-12 18:36:17,841 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:17,841 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:17,842 INFO L423 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:17,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 723666563, now seen corresponding path program 1 times [2018-11-12 18:36:17,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:17,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:17,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:17,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:17,844 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-12 18:36:18,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:18,520 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:18,520 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 329 with the following transitions: [2018-11-12 18:36:18,520 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [542], [543], [547], [550], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:18,525 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:18,525 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:18,637 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:20,035 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:36:20,035 INFO L272 AbstractInterpreter]: Visited 142 different actions 560 times. Merged at 7 different actions 26 times. Never widened. Performed 8797 root evaluator evaluations with a maximum evaluation depth of 6. Performed 8797 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 4 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:36:20,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:20,041 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:36:20,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:20,041 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:36:20,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:20,051 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:36:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:20,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:36:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-12 18:36:20,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:36:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 236 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-11-12 18:36:20,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:36:20,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2018-11-12 18:36:20,706 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:36:20,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-12 18:36:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-12 18:36:20,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-11-12 18:36:20,709 INFO L87 Difference]: Start difference. First operand 13210 states and 18787 transitions. Second operand 7 states. [2018-11-12 18:36:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:22,763 INFO L93 Difference]: Finished difference Result 25216 states and 37179 transitions. [2018-11-12 18:36:22,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 18:36:22,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 328 [2018-11-12 18:36:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:22,821 INFO L225 Difference]: With dead ends: 25216 [2018-11-12 18:36:22,821 INFO L226 Difference]: Without dead ends: 12582 [2018-11-12 18:36:22,856 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 656 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:36:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12582 states. [2018-11-12 18:36:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12582 to 11743. [2018-11-12 18:36:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11743 states. [2018-11-12 18:36:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 15482 transitions. [2018-11-12 18:36:23,139 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 15482 transitions. Word has length 328 [2018-11-12 18:36:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:23,140 INFO L480 AbstractCegarLoop]: Abstraction has 11743 states and 15482 transitions. [2018-11-12 18:36:23,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-12 18:36:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 15482 transitions. [2018-11-12 18:36:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2018-11-12 18:36:23,169 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:23,170 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:36:23,170 INFO L423 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:23,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2606834, now seen corresponding path program 1 times [2018-11-12 18:36:23,171 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:23,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:23,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:23,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:23,172 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:24,610 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-11-12 18:36:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 103 proven. 141 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2018-11-12 18:36:24,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:24,868 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:24,868 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 350 with the following transitions: [2018-11-12 18:36:24,868 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:24,871 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:24,871 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:25,042 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:25,896 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:36:25,897 INFO L272 AbstractInterpreter]: Visited 137 different actions 679 times. Merged at 8 different actions 40 times. Widened at 1 different actions 1 times. Performed 12057 root evaluator evaluations with a maximum evaluation depth of 6. Performed 12057 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 8 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:36:25,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:25,903 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:36:25,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:25,903 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:36:25,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:25,912 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:36:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:26,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:36:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:36:26,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:36:27,064 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 262 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-11-12 18:36:27,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:36:27,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 17 [2018-11-12 18:36:27,084 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:36:27,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-12 18:36:27,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-12 18:36:27,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2018-11-12 18:36:27,088 INFO L87 Difference]: Start difference. First operand 11743 states and 15482 transitions. Second operand 15 states. [2018-11-12 18:36:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:36:49,990 INFO L93 Difference]: Finished difference Result 55372 states and 89785 transitions. [2018-11-12 18:36:49,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-11-12 18:36:49,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 349 [2018-11-12 18:36:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:36:50,244 INFO L225 Difference]: With dead ends: 55372 [2018-11-12 18:36:50,244 INFO L226 Difference]: Without dead ends: 44204 [2018-11-12 18:36:50,380 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6337 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2151, Invalid=14105, Unknown=0, NotChecked=0, Total=16256 [2018-11-12 18:36:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44204 states. [2018-11-12 18:36:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44204 to 40087. [2018-11-12 18:36:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40087 states. [2018-11-12 18:36:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 51365 transitions. [2018-11-12 18:36:51,547 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 51365 transitions. Word has length 349 [2018-11-12 18:36:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:36:51,547 INFO L480 AbstractCegarLoop]: Abstraction has 40087 states and 51365 transitions. [2018-11-12 18:36:51,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-12 18:36:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 51365 transitions. [2018-11-12 18:36:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2018-11-12 18:36:51,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:36:51,681 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 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] [2018-11-12 18:36:51,681 INFO L423 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:36:51,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1605365467, now seen corresponding path program 1 times [2018-11-12 18:36:51,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:36:51,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:51,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:51,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:36:51,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:36:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 367 proven. 21 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2018-11-12 18:36:52,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:52,500 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:36:52,501 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 480 with the following transitions: [2018-11-12 18:36:52,501 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [777], [781], [784], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:36:52,503 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:36:52,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:36:52,581 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:36:53,515 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:36:53,515 INFO L272 AbstractInterpreter]: Visited 145 different actions 729 times. Merged at 9 different actions 49 times. Never widened. Performed 11856 root evaluator evaluations with a maximum evaluation depth of 6. Performed 11856 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 13 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:36:53,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:36:53,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:36:53,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:36:53,521 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:36:53,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:36:53,530 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:36:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:36:53,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:36:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 569 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-11-12 18:36:54,464 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:36:54,819 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-12 18:36:54,973 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-11-12 18:36:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 313 proven. 104 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2018-11-12 18:36:55,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:36:55,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2018-11-12 18:36:55,662 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:36:55,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-12 18:36:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-12 18:36:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-12 18:36:55,664 INFO L87 Difference]: Start difference. First operand 40087 states and 51365 transitions. Second operand 10 states. [2018-11-12 18:37:11,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:11,465 INFO L93 Difference]: Finished difference Result 111427 states and 168487 transitions. [2018-11-12 18:37:11,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-12 18:37:11,465 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 479 [2018-11-12 18:37:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:11,916 INFO L225 Difference]: With dead ends: 111427 [2018-11-12 18:37:11,916 INFO L226 Difference]: Without dead ends: 71919 [2018-11-12 18:37:12,518 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1000 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=799, Invalid=3893, Unknown=0, NotChecked=0, Total=4692 [2018-11-12 18:37:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71919 states. [2018-11-12 18:37:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71919 to 67573. [2018-11-12 18:37:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67573 states. [2018-11-12 18:37:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67573 states to 67573 states and 85283 transitions. [2018-11-12 18:37:14,383 INFO L78 Accepts]: Start accepts. Automaton has 67573 states and 85283 transitions. Word has length 479 [2018-11-12 18:37:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:14,384 INFO L480 AbstractCegarLoop]: Abstraction has 67573 states and 85283 transitions. [2018-11-12 18:37:14,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-12 18:37:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 67573 states and 85283 transitions. [2018-11-12 18:37:14,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-11-12 18:37:14,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:14,513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:37:14,513 INFO L423 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:14,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1966957764, now seen corresponding path program 1 times [2018-11-12 18:37:14,514 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:14,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:14,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:14,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:14,515 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-12 18:37:14,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:14,942 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:14,942 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 488 with the following transitions: [2018-11-12 18:37:14,943 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [800], [805], [807], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:14,949 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:14,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:15,172 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:16,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:37:16,924 INFO L272 AbstractInterpreter]: Visited 148 different actions 874 times. Merged at 8 different actions 45 times. Widened at 1 different actions 1 times. Performed 15818 root evaluator evaluations with a maximum evaluation depth of 6. Performed 15818 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 10 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:37:16,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:16,930 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:37:16,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:16,930 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:37:16,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:16,939 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:37:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:17,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:37:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2018-11-12 18:37:17,170 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:37:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-12 18:37:17,309 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 18:37:17,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 3 [2018-11-12 18:37:17,309 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 18:37:17,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 18:37:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 18:37:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:37:17,312 INFO L87 Difference]: Start difference. First operand 67573 states and 85283 transitions. Second operand 3 states. [2018-11-12 18:37:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:19,278 INFO L93 Difference]: Finished difference Result 148999 states and 192410 transitions. [2018-11-12 18:37:19,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 18:37:19,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2018-11-12 18:37:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:19,462 INFO L225 Difference]: With dead ends: 148999 [2018-11-12 18:37:19,462 INFO L226 Difference]: Without dead ends: 66409 [2018-11-12 18:37:19,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 975 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-12 18:37:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66409 states. [2018-11-12 18:37:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66409 to 66407. [2018-11-12 18:37:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66407 states. [2018-11-12 18:37:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66407 states to 66407 states and 80493 transitions. [2018-11-12 18:37:21,630 INFO L78 Accepts]: Start accepts. Automaton has 66407 states and 80493 transitions. Word has length 487 [2018-11-12 18:37:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:21,631 INFO L480 AbstractCegarLoop]: Abstraction has 66407 states and 80493 transitions. [2018-11-12 18:37:21,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 18:37:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 66407 states and 80493 transitions. [2018-11-12 18:37:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-11-12 18:37:21,825 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:21,825 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-11-12 18:37:21,826 INFO L423 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:21,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1554889697, now seen corresponding path program 1 times [2018-11-12 18:37:21,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:21,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:21,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:21,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:21,828 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 115 proven. 304 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2018-11-12 18:37:23,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:23,186 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:23,186 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 555 with the following transitions: [2018-11-12 18:37:23,188 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [792], [793], [797], [808], [811], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:23,191 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:23,191 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:23,455 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:25,772 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:37:25,773 INFO L272 AbstractInterpreter]: Visited 159 different actions 1433 times. Merged at 9 different actions 92 times. Widened at 1 different actions 4 times. Performed 27134 root evaluator evaluations with a maximum evaluation depth of 6. Performed 27134 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 23 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:37:25,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:25,778 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:37:25,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:25,778 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:37:25,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:25,788 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:37:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:25,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:37:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 398 proven. 2 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2018-11-12 18:37:26,184 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:37:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 115 proven. 561 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-11-12 18:37:26,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:37:26,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2018-11-12 18:37:26,818 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:37:26,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 18:37:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 18:37:26,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-11-12 18:37:26,820 INFO L87 Difference]: Start difference. First operand 66407 states and 80493 transitions. Second operand 9 states. [2018-11-12 18:37:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:37:32,210 INFO L93 Difference]: Finished difference Result 149444 states and 185991 transitions. [2018-11-12 18:37:32,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-12 18:37:32,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 554 [2018-11-12 18:37:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:37:32,517 INFO L225 Difference]: With dead ends: 149444 [2018-11-12 18:37:32,517 INFO L226 Difference]: Without dead ends: 86777 [2018-11-12 18:37:32,665 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1109 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2018-11-12 18:37:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86777 states. [2018-11-12 18:37:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86777 to 86246. [2018-11-12 18:37:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86246 states. [2018-11-12 18:37:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86246 states to 86246 states and 106854 transitions. [2018-11-12 18:37:34,548 INFO L78 Accepts]: Start accepts. Automaton has 86246 states and 106854 transitions. Word has length 554 [2018-11-12 18:37:34,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:37:34,548 INFO L480 AbstractCegarLoop]: Abstraction has 86246 states and 106854 transitions. [2018-11-12 18:37:34,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 18:37:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 86246 states and 106854 transitions. [2018-11-12 18:37:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-11-12 18:37:34,842 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:37:34,842 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-11-12 18:37:34,843 INFO L423 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:37:34,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1285057489, now seen corresponding path program 1 times [2018-11-12 18:37:34,843 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:37:34,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:34,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:34,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:37:34,844 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:37:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 319 proven. 104 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2018-11-12 18:37:35,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:35,880 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:37:35,880 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 569 with the following transitions: [2018-11-12 18:37:35,881 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [641], [642], [646], [650], [653], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [812], [816], [820], [824], [828], [832], [843], [847], [851], [862], [866], [869], [870], [874], [878], [889], [893], [897], [901], [905], [909], [913], [924], [928], [932], [936], [940], [944], [948], [952], [956], [960], [971], [975], [979], [983], [987], [991], [1002], [1005], [1008], [1012], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:37:35,884 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:37:35,884 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:37:36,321 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:37:38,017 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:37:38,017 INFO L272 AbstractInterpreter]: Visited 188 different actions 1307 times. Merged at 9 different actions 62 times. Widened at 1 different actions 2 times. Performed 23665 root evaluator evaluations with a maximum evaluation depth of 6. Performed 23665 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 15 fixpoints after 2 different actions. Largest state had 28 variables. [2018-11-12 18:37:38,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:37:38,025 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:37:38,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:37:38,025 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:37:38,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:37:38,036 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:37:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:37:38,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:37:39,799 WARN L179 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2018-11-12 18:37:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 475 proven. 2 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-11-12 18:37:41,686 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:37:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 248 proven. 209 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2018-11-12 18:37:42,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:37:42,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 14 [2018-11-12 18:37:42,874 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:37:42,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 18:37:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 18:37:42,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2018-11-12 18:37:42,876 INFO L87 Difference]: Start difference. First operand 86246 states and 106854 transitions. Second operand 12 states. [2018-11-12 18:37:46,683 WARN L179 SmtUtils]: Spent 3.00 s on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2018-11-12 18:38:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:19,173 INFO L93 Difference]: Finished difference Result 190465 states and 249956 transitions. [2018-11-12 18:38:19,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-12 18:38:19,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 568 [2018-11-12 18:38:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:22,989 INFO L225 Difference]: With dead ends: 190465 [2018-11-12 18:38:22,990 INFO L226 Difference]: Without dead ends: 101392 [2018-11-12 18:38:23,343 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1154 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=370, Invalid=1434, Unknown=2, NotChecked=0, Total=1806 [2018-11-12 18:38:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101392 states. [2018-11-12 18:38:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101392 to 99057. [2018-11-12 18:38:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99057 states. [2018-11-12 18:38:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99057 states to 99057 states and 120103 transitions. [2018-11-12 18:38:25,493 INFO L78 Accepts]: Start accepts. Automaton has 99057 states and 120103 transitions. Word has length 568 [2018-11-12 18:38:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 18:38:25,494 INFO L480 AbstractCegarLoop]: Abstraction has 99057 states and 120103 transitions. [2018-11-12 18:38:25,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 18:38:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 99057 states and 120103 transitions. [2018-11-12 18:38:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2018-11-12 18:38:25,795 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 18:38:25,795 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 18:38:25,796 INFO L423 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 18:38:25,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash -371693766, now seen corresponding path program 1 times [2018-11-12 18:38:25,796 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 18:38:25,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:25,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:25,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 18:38:25,799 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 18:38:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 423 proven. 100 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-12 18:38:26,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:26,391 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 18:38:26,391 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 590 with the following transitions: [2018-11-12 18:38:26,391 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [562], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [618], [623], [625], [626], [630], [634], [638], [641], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [750], [751], [762], [766], [777], [781], [785], [789], [793], [797], [808], [811], [1084], [1088], [1092], [1098], [1102], [1104], [1109], [1110], [1111], [1113], [1114] [2018-11-12 18:38:26,394 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 18:38:26,394 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 18:38:26,499 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 18:38:27,914 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 18:38:27,914 INFO L272 AbstractInterpreter]: Visited 149 different actions 893 times. Merged at 9 different actions 56 times. Widened at 1 different actions 2 times. Performed 13746 root evaluator evaluations with a maximum evaluation depth of 6. Performed 13746 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 14 fixpoints after 3 different actions. Largest state had 28 variables. [2018-11-12 18:38:27,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 18:38:27,919 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 18:38:27,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 18:38:27,919 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 18:38:27,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 18:38:27,928 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 18:38:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 18:38:28,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 18:38:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 782 proven. 2 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2018-11-12 18:38:28,358 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 18:38:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 423 proven. 100 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2018-11-12 18:38:28,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 18:38:28,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 18:38:28,761 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 18:38:28,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 18:38:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 18:38:28,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-12 18:38:28,763 INFO L87 Difference]: Start difference. First operand 99057 states and 120103 transitions. Second operand 9 states. [2018-11-12 18:38:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 18:38:33,119 INFO L93 Difference]: Finished difference Result 186936 states and 233231 transitions. [2018-11-12 18:38:33,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 18:38:33,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 589 [2018-11-12 18:38:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 18:38:33,389 INFO L225 Difference]: With dead ends: 186936 [2018-11-12 18:38:33,389 INFO L226 Difference]: Without dead ends: 87868 [2018-11-12 18:38:33,706 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1180 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-11-12 18:38:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87868 states. [2018-11-12 18:38:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87868 to 85496. [2018-11-12 18:38:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85496 states. Received shutdown request... [2018-11-12 18:38:35,092 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 18:38:35,099 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 18:38:35,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 06:38:35 BoogieIcfgContainer [2018-11-12 18:38:35,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 18:38:35,100 INFO L168 Benchmark]: Toolchain (without parser) took 210970.33 ms. Allocated memory was 1.5 GB in the beginning and 4.9 GB in the end (delta: 3.3 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-11-12 18:38:35,101 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 18:38:35,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1025.32 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:35,102 INFO L168 Benchmark]: Boogie Procedure Inliner took 179.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -855.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:35,103 INFO L168 Benchmark]: Boogie Preprocessor took 127.90 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. [2018-11-12 18:38:35,104 INFO L168 Benchmark]: RCFGBuilder took 4329.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 172.7 MB). Peak memory consumption was 172.7 MB. Max. memory is 7.1 GB. [2018-11-12 18:38:35,105 INFO L168 Benchmark]: TraceAbstraction took 205303.47 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -589.2 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-11-12 18:38:35,109 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1025.32 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: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 179.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 747.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -855.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.90 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 4329.03 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 172.7 MB). Peak memory consumption was 172.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 205303.47 ms. Allocated memory was 2.3 GB in the beginning and 4.9 GB in the end (delta: 2.6 GB). Free memory was 2.0 GB in the beginning and 2.6 GB in the end (delta: -589.2 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 75). Cancelled while ReachableStatesComputation was computing reachable states (78160 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 293 locations, 1 error locations. TIMEOUT Result, 205.2s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 151.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3296 SDtfs, 24211 SDslu, 5615 SDs, 0 SdLazy, 52843 SolverSat, 8111 SolverUnsat, 69 SolverUnknown, 0 SolverNotchecked, 89.9s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 8582 GetRequests, 8228 SyntacticMatches, 12 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8654 ImplicationChecksByTransitivity, 20.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99057occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 15.0s AbstIntTime, 11 AbstIntIterations, 2 AbstIntStrong, 0.9973945953235893 AbsIntWeakeningRatio, 0.1222879684418146 AbsIntAvgWeakeningVarsNumRemoved, 22.412228796844182 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 11.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 13399 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 19.0s InterpolantComputationTime, 8444 NumberOfCodeBlocks, 8444 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 12195 ConstructedInterpolants, 7 QuantifiedInterpolants, 14368139 SizeOfPredicates, 9 NumberOfNonLiveVariables, 6173 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 32 InterpolantComputations, 6 PerfectInterpolantSequences, 13238/15250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown