java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 16:48:33,273 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 16:48:33,277 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 16:48:33,287 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 16:48:33,288 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 16:48:33,289 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 16:48:33,290 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 16:48:33,292 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 16:48:33,294 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 16:48:33,295 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 16:48:33,296 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 16:48:33,296 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 16:48:33,297 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 16:48:33,298 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 16:48:33,299 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 16:48:33,301 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 16:48:33,301 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 16:48:33,306 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 16:48:33,311 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 16:48:33,313 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 16:48:33,316 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 16:48:33,317 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 16:48:33,319 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 16:48:33,319 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 16:48:33,319 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 16:48:33,320 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 16:48:33,321 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 16:48:33,322 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 16:48:33,323 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 16:48:33,324 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 16:48:33,324 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 16:48:33,325 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 16:48:33,325 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 16:48:33,325 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 16:48:33,326 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 16:48:33,327 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 16:48:33,327 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 16:48:33,354 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 16:48:33,354 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 16:48:33,355 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 16:48:33,355 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 16:48:33,355 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 16:48:33,356 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 16:48:33,357 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 16:48:33,357 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 16:48:33,357 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 16:48:33,357 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 16:48:33,357 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 16:48:33,358 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 16:48:33,358 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 16:48:33,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 16:48:33,359 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 16:48:33,359 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 16:48:33,360 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 16:48:33,360 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 16:48:33,360 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 16:48:33,360 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 16:48:33,360 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 16:48:33,361 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 16:48:33,362 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 16:48:33,362 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 16:48:33,362 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 16:48:33,362 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 16:48:33,362 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 16:48:33,363 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 16:48:33,364 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 16:48:33,364 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 16:48:33,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 16:48:33,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 16:48:33,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 16:48:33,441 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 16:48:33,441 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 16:48:33,442 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c [2018-11-12 16:48:33,504 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57673137/6a3e84ffffaa4bf3abba5530116938b0/FLAG6887396c1 [2018-11-12 16:48:34,222 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 16:48:34,223 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label31_false-unreach-call.c [2018-11-12 16:48:34,253 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57673137/6a3e84ffffaa4bf3abba5530116938b0/FLAG6887396c1 [2018-11-12 16:48:34,269 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a57673137/6a3e84ffffaa4bf3abba5530116938b0 [2018-11-12 16:48:34,281 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 16:48:34,287 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 16:48:34,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 16:48:34,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 16:48:34,294 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 16:48:34,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:48:34" (1/1) ... [2018-11-12 16:48:34,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bfe8fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:34, skipping insertion in model container [2018-11-12 16:48:34,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:48:34" (1/1) ... [2018-11-12 16:48:34,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 16:48:34,428 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 16:48:35,453 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:48:35,458 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 16:48:35,873 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 16:48:35,896 INFO L193 MainTranslator]: Completed translation [2018-11-12 16:48:35,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35 WrapperNode [2018-11-12 16:48:35,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 16:48:35,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 16:48:35,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 16:48:35,898 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 16:48:36,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 16:48:36,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 16:48:36,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 16:48:36,145 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 16:48:36,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (1/1) ... [2018-11-12 16:48:36,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 16:48:36,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 16:48:36,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 16:48:36,345 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 16:48:36,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (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 16:48:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-12 16:48:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 16:48:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 16:48:36,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-12 16:48:36,417 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-12 16:48:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-12 16:48:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-12 16:48:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 16:48:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 16:48:36,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 16:48:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 16:48:45,806 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 16:48:45,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:48:45 BoogieIcfgContainer [2018-11-12 16:48:45,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 16:48:45,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 16:48:45,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 16:48:45,811 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 16:48:45,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:48:34" (1/3) ... [2018-11-12 16:48:45,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5ebf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:48:45, skipping insertion in model container [2018-11-12 16:48:45,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:48:35" (2/3) ... [2018-11-12 16:48:45,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5ebf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:48:45, skipping insertion in model container [2018-11-12 16:48:45,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:48:45" (3/3) ... [2018-11-12 16:48:45,815 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label31_false-unreach-call.c [2018-11-12 16:48:45,825 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 16:48:45,834 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 16:48:45,852 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 16:48:45,894 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 16:48:45,894 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 16:48:45,895 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 16:48:45,895 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 16:48:45,895 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 16:48:45,895 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 16:48:45,895 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 16:48:45,895 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 16:48:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states. [2018-11-12 16:48:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-12 16:48:45,937 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:48:45,938 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:48:45,941 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:48:45,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:45,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1332199658, now seen corresponding path program 1 times [2018-11-12 16:48:45,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:48:46,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:46,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:46,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:46,001 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:48:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:46,322 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 16:48:46,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:48:46,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:48:46,325 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:48:46,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:48:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:48:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:48:46,351 INFO L87 Difference]: Start difference. First operand 604 states. Second operand 4 states. [2018-11-12 16:48:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:48:54,716 INFO L93 Difference]: Finished difference Result 2118 states and 3937 transitions. [2018-11-12 16:48:54,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:48:54,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-11-12 16:48:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:48:54,745 INFO L225 Difference]: With dead ends: 2118 [2018-11-12 16:48:54,745 INFO L226 Difference]: Without dead ends: 1508 [2018-11-12 16:48:54,757 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 16:48:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2018-11-12 16:48:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1039. [2018-11-12 16:48:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2018-11-12 16:48:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1596 transitions. [2018-11-12 16:48:54,880 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1596 transitions. Word has length 15 [2018-11-12 16:48:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:48:54,881 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 1596 transitions. [2018-11-12 16:48:54,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:48:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1596 transitions. [2018-11-12 16:48:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-12 16:48:54,886 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:48:54,886 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:48:54,887 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:48:54,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1251140705, now seen corresponding path program 1 times [2018-11-12 16:48:54,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:48:54,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:54,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:48:54,889 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:48:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:55,460 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-11-12 16:48:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:48:55,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:48:55,602 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:48:55,603 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 91 with the following transitions: [2018-11-12 16:48:55,606 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:48:55,657 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:48:55,658 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:48:56,146 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:48:56,909 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:48:56,912 INFO L272 AbstractInterpreter]: Visited 83 different actions 235 times. Merged at 5 different actions 9 times. Never widened. Performed 3909 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3909 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:48:56,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:48:56,969 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:48:56,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:48:56,969 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 16:48:56,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:48:56,987 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:48:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:48:57,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:48:59,680 WARN L179 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2018-11-12 16:48:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:48:59,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:49:00,644 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-11-12 16:49:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:49:01,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 16:49:01,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2018-11-12 16:49:01,068 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:49:01,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-12 16:49:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-12 16:49:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-11-12 16:49:01,071 INFO L87 Difference]: Start difference. First operand 1039 states and 1596 transitions. Second operand 6 states. [2018-11-12 16:51:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:37,438 INFO L93 Difference]: Finished difference Result 3458 states and 5565 transitions. [2018-11-12 16:51:37,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 16:51:37,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2018-11-12 16:51:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:37,462 INFO L225 Difference]: With dead ends: 3458 [2018-11-12 16:51:37,462 INFO L226 Difference]: Without dead ends: 2425 [2018-11-12 16:51:37,470 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-12 16:51:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2018-11-12 16:51:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2416. [2018-11-12 16:51:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2416 states. [2018-11-12 16:51:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3790 transitions. [2018-11-12 16:51:37,579 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3790 transitions. Word has length 90 [2018-11-12 16:51:37,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:37,580 INFO L480 AbstractCegarLoop]: Abstraction has 2416 states and 3790 transitions. [2018-11-12 16:51:37,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-12 16:51:37,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3790 transitions. [2018-11-12 16:51:37,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-11-12 16:51:37,585 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:37,585 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-11-12 16:51:37,586 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:37,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash 785805159, now seen corresponding path program 1 times [2018-11-12 16:51:37,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:37,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:37,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:37,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:37,588 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:37,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:37,903 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:51:37,903 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 104 with the following transitions: [2018-11-12 16:51:37,904 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:51:37,909 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:51:37,909 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:51:38,019 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:51:38,539 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:51:38,540 INFO L272 AbstractInterpreter]: Visited 96 different actions 274 times. Merged at 5 different actions 9 times. Never widened. Performed 4222 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4222 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:51:38,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:38,579 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:51:38,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:38,579 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 16:51:38,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:38,595 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:51:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:38,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:51:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:38,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:51:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:39,151 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-12 16:51:39,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2018-11-12 16:51:39,152 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-12 16:51:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-12 16:51:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:51:39,153 INFO L87 Difference]: Start difference. First operand 2416 states and 3790 transitions. Second operand 3 states. [2018-11-12 16:51:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:43,230 INFO L93 Difference]: Finished difference Result 7006 states and 11241 transitions. [2018-11-12 16:51:43,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-12 16:51:43,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2018-11-12 16:51:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:43,258 INFO L225 Difference]: With dead ends: 7006 [2018-11-12 16:51:43,258 INFO L226 Difference]: Without dead ends: 4596 [2018-11-12 16:51:43,271 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-12 16:51:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2018-11-12 16:51:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 4595. [2018-11-12 16:51:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4595 states. [2018-11-12 16:51:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7187 transitions. [2018-11-12 16:51:43,411 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7187 transitions. Word has length 103 [2018-11-12 16:51:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:43,411 INFO L480 AbstractCegarLoop]: Abstraction has 4595 states and 7187 transitions. [2018-11-12 16:51:43,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-12 16:51:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7187 transitions. [2018-11-12 16:51:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-11-12 16:51:43,423 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:43,427 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:51:43,427 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:43,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash -845406584, now seen corresponding path program 1 times [2018-11-12 16:51:43,428 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:43,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:43,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:43,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:43,430 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:51:43,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:43,645 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:51:43,645 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 167 with the following transitions: [2018-11-12 16:51:43,645 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1227], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:51:43,649 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:51:43,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:51:43,719 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:51:44,219 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:51:44,220 INFO L272 AbstractInterpreter]: Visited 85 different actions 241 times. Merged at 5 different actions 9 times. Never widened. Performed 3961 root evaluator evaluations with a maximum evaluation depth of 6. Performed 3961 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:51:44,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:44,257 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:51:44,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:44,258 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 16:51:44,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:44,352 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:51:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:44,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:51:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-12 16:51:44,664 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:51:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-12 16:51:45,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-12 16:51:45,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2018-11-12 16:51:45,161 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:45,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 16:51:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 16:51:45,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:51:45,162 INFO L87 Difference]: Start difference. First operand 4595 states and 7187 transitions. Second operand 5 states. [2018-11-12 16:51:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:49,248 INFO L93 Difference]: Finished difference Result 9294 states and 14621 transitions. [2018-11-12 16:51:49,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-12 16:51:49,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2018-11-12 16:51:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:49,275 INFO L225 Difference]: With dead ends: 9294 [2018-11-12 16:51:49,276 INFO L226 Difference]: Without dead ends: 4705 [2018-11-12 16:51:49,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-11-12 16:51:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4705 states. [2018-11-12 16:51:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4705 to 4662. [2018-11-12 16:51:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4662 states. [2018-11-12 16:51:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 6109 transitions. [2018-11-12 16:51:49,440 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 6109 transitions. Word has length 166 [2018-11-12 16:51:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:49,441 INFO L480 AbstractCegarLoop]: Abstraction has 4662 states and 6109 transitions. [2018-11-12 16:51:49,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 16:51:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 6109 transitions. [2018-11-12 16:51:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-12 16:51:49,443 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:49,443 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:51:49,444 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:49,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2128733365, now seen corresponding path program 1 times [2018-11-12 16:51:49,444 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:49,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:49,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:49,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:49,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:49,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:49,909 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:51:49,909 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 189 with the following transitions: [2018-11-12 16:51:49,909 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1270], [1271], [1275], [1279], [1282], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:51:49,917 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:51:49,917 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:51:50,007 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:51:50,434 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:51:50,435 INFO L272 AbstractInterpreter]: Visited 97 different actions 277 times. Merged at 5 different actions 9 times. Never widened. Performed 4250 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4250 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:51:50,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:50,472 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:51:50,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:51:50,473 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 16:51:50,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:50,484 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:51:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:50,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:51:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:50,849 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:51:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:51:51,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:51:51,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2018-11-12 16:51:51,153 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:51:51,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-12 16:51:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-12 16:51:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-11-12 16:51:51,154 INFO L87 Difference]: Start difference. First operand 4662 states and 6109 transitions. Second operand 9 states. [2018-11-12 16:51:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:51:58,411 INFO L93 Difference]: Finished difference Result 11615 states and 15961 transitions. [2018-11-12 16:51:58,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 16:51:58,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 188 [2018-11-12 16:51:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:51:58,457 INFO L225 Difference]: With dead ends: 11615 [2018-11-12 16:51:58,457 INFO L226 Difference]: Without dead ends: 6959 [2018-11-12 16:51:58,471 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 373 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2018-11-12 16:51:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2018-11-12 16:51:58,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6934. [2018-11-12 16:51:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6934 states. [2018-11-12 16:51:58,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6934 states to 6934 states and 9218 transitions. [2018-11-12 16:51:58,644 INFO L78 Accepts]: Start accepts. Automaton has 6934 states and 9218 transitions. Word has length 188 [2018-11-12 16:51:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:51:58,645 INFO L480 AbstractCegarLoop]: Abstraction has 6934 states and 9218 transitions. [2018-11-12 16:51:58,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-12 16:51:58,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6934 states and 9218 transitions. [2018-11-12 16:51:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-11-12 16:51:58,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:51:58,650 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:51:58,650 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:51:58,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:51:58,650 INFO L82 PathProgramCache]: Analyzing trace with hash -356935277, now seen corresponding path program 1 times [2018-11-12 16:51:58,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:51:58,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:58,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:51:58,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:51:58,652 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:51:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:51:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2018-11-12 16:51:58,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 16:51:58,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-12 16:51:58,986 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 16:51:58,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-12 16:51:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-12 16:51:58,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:51:58,987 INFO L87 Difference]: Start difference. First operand 6934 states and 9218 transitions. Second operand 4 states. [2018-11-12 16:52:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 16:52:04,997 INFO L93 Difference]: Finished difference Result 26224 states and 36518 transitions. [2018-11-12 16:52:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-12 16:52:04,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 192 [2018-11-12 16:52:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 16:52:05,085 INFO L225 Difference]: With dead ends: 26224 [2018-11-12 16:52:05,086 INFO L226 Difference]: Without dead ends: 19296 [2018-11-12 16:52:05,118 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-12 16:52:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19296 states. [2018-11-12 16:52:05,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19296 to 19289. [2018-11-12 16:52:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19289 states. [2018-11-12 16:52:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19289 states to 19289 states and 25454 transitions. [2018-11-12 16:52:05,571 INFO L78 Accepts]: Start accepts. Automaton has 19289 states and 25454 transitions. Word has length 192 [2018-11-12 16:52:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 16:52:05,572 INFO L480 AbstractCegarLoop]: Abstraction has 19289 states and 25454 transitions. [2018-11-12 16:52:05,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-12 16:52:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 19289 states and 25454 transitions. [2018-11-12 16:52:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-12 16:52:05,577 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 16:52:05,577 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 16:52:05,578 INFO L423 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 16:52:05,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash -642106140, now seen corresponding path program 1 times [2018-11-12 16:52:05,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 16:52:05,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:05,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:05,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 16:52:05,579 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 16:52:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:06,118 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2018-11-12 16:52:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-12 16:52:06,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:06,234 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 16:52:06,235 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 198 with the following transitions: [2018-11-12 16:52:06,235 INFO L202 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [730], [732], [735], [743], [751], [759], [767], [775], [783], [791], [799], [807], [815], [823], [831], [839], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1282], [1283], [1287], [1291], [1295], [1299], [1303], [1306], [2279], [2283], [2287], [2293], [2297], [2299], [2306], [2307], [2308], [2310], [2311] [2018-11-12 16:52:06,238 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 16:52:06,239 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 16:52:06,314 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 16:52:06,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 16:52:06,746 INFO L272 AbstractInterpreter]: Visited 103 different actions 295 times. Merged at 5 different actions 9 times. Never widened. Performed 4660 root evaluator evaluations with a maximum evaluation depth of 6. Performed 4660 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2018-11-12 16:52:06,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 16:52:06,773 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 16:52:06,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 16:52:06,773 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 16:52:06,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 16:52:06,790 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 16:52:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 16:52:06,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 16:52:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2018-11-12 16:52:07,344 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 16:52:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 16:52:08,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 16:52:08,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2018-11-12 16:52:08,444 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 16:52:08,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-12 16:52:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-12 16:52:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2018-11-12 16:52:08,446 INFO L87 Difference]: Start difference. First operand 19289 states and 25454 transitions. Second operand 14 states. Received shutdown request... [2018-11-12 16:52:48,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-11-12 16:52:48,180 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-12 16:52:48,185 WARN L205 ceAbstractionStarter]: Timeout [2018-11-12 16:52:48,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 04:52:48 BoogieIcfgContainer [2018-11-12 16:52:48,186 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 16:52:48,187 INFO L168 Benchmark]: Toolchain (without parser) took 253905.44 ms. Allocated memory was 1.6 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -373.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,188 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-12 16:52:48,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1608.99 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,189 INFO L168 Benchmark]: Boogie Procedure Inliner took 246.83 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 801.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -985.4 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,190 INFO L168 Benchmark]: Boogie Preprocessor took 199.99 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,191 INFO L168 Benchmark]: RCFGBuilder took 9462.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 468.7 MB). Peak memory consumption was 468.7 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,191 INFO L168 Benchmark]: TraceAbstraction took 242377.92 ms. Allocated memory was 2.4 GB in the beginning and 3.2 GB in the end (delta: 839.4 MB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: -7.4 MB). Peak memory consumption was 832.0 MB. Max. memory is 7.1 GB. [2018-11-12 16:52:48,198 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1608.99 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 137.4 MB). Peak memory consumption was 137.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 246.83 ms. Allocated memory was 1.6 GB in the beginning and 2.4 GB in the end (delta: 801.6 MB). Free memory was 1.3 GB in the beginning and 2.3 GB in the end (delta: -985.4 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 199.99 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9462.19 ms. Allocated memory is still 2.4 GB. Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 468.7 MB). Peak memory consumption was 468.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242377.92 ms. Allocated memory was 2.4 GB in the beginning and 3.2 GB in the end (delta: 839.4 MB). Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: -7.4 MB). Peak memory consumption was 832.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 32]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 32). Cancelled while BasicCegarLoop was constructing difference of abstraction (19289states) and FLOYD_HOARE automaton (currently 113 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (48930 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 604 locations, 1 error locations. TIMEOUT Result, 242.3s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 226.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3012 SDtfs, 22316 SDslu, 3476 SDs, 0 SdLazy, 40994 SolverSat, 8263 SolverUnsat, 222 SolverUnknown, 0 SolverNotchecked, 211.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1657 GetRequests, 1473 SyntacticMatches, 14 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19289occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.7s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 554 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 1695 NumberOfCodeBlocks, 1695 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 2422 ConstructedInterpolants, 178 QuantifiedInterpolants, 2137029 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1632 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 706/1040 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown