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.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 15:11:03,074 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 15:11:03,076 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 15:11:03,093 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 15:11:03,093 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 15:11:03,095 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 15:11:03,097 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 15:11:03,099 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 15:11:03,102 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 15:11:03,103 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 15:11:03,104 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 15:11:03,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 15:11:03,108 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 15:11:03,109 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 15:11:03,110 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 15:11:03,114 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 15:11:03,115 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 15:11:03,118 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 15:11:03,123 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 15:11:03,124 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 15:11:03,125 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 15:11:03,126 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 15:11:03,129 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 15:11:03,129 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 15:11:03,129 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 15:11:03,130 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 15:11:03,131 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 15:11:03,132 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 15:11:03,132 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 15:11:03,133 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 15:11:03,133 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 15:11:03,134 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 15:11:03,134 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 15:11:03,134 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 15:11:03,135 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 15:11:03,136 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 15:11:03,136 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.epf [2018-11-07 15:11:03,155 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 15:11:03,155 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 15:11:03,156 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 15:11:03,156 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 15:11:03,156 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 15:11:03,157 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 15:11:03,157 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 15:11:03,157 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 15:11:03,157 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 15:11:03,157 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 15:11:03,158 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 15:11:03,158 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 15:11:03,159 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 15:11:03,159 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 15:11:03,159 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 15:11:03,159 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 15:11:03,159 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 15:11:03,160 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 15:11:03,160 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 15:11:03,160 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 15:11:03,160 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 15:11:03,161 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 15:11:03,161 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 15:11:03,161 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 15:11:03,161 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 15:11:03,161 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 15:11:03,162 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 15:11:03,162 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 15:11:03,162 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 15:11:03,162 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 15:11:03,162 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 15:11:03,163 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 15:11:03,163 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 15:11:03,163 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 15:11:03,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 15:11:03,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 15:11:03,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 15:11:03,247 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 15:11:03,247 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 15:11:03,248 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28_true-unreach-call.c [2018-11-07 15:11:03,311 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff439e1e0/135b6d0f0d2b44ddb80856f4bc574d6c/FLAG051a2d272 [2018-11-07 15:11:03,943 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 15:11:03,944 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28_true-unreach-call.c [2018-11-07 15:11:03,967 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff439e1e0/135b6d0f0d2b44ddb80856f4bc574d6c/FLAG051a2d272 [2018-11-07 15:11:03,984 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff439e1e0/135b6d0f0d2b44ddb80856f4bc574d6c [2018-11-07 15:11:03,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 15:11:03,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 15:11:04,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 15:11:04,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 15:11:04,005 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 15:11:04,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:11:03" (1/1) ... [2018-11-07 15:11:04,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa20d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:04, skipping insertion in model container [2018-11-07 15:11:04,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:11:03" (1/1) ... [2018-11-07 15:11:04,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 15:11:04,120 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 15:11:04,982 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:11:04,987 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 15:11:05,315 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 15:11:05,340 INFO L193 MainTranslator]: Completed translation [2018-11-07 15:11:05,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05 WrapperNode [2018-11-07 15:11:05,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 15:11:05,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 15:11:05,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 15:11:05,343 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 15:11:05,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 15:11:05,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 15:11:05,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 15:11:05,599 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 15:11:05,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (1/1) ... [2018-11-07 15:11:05,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 15:11:05,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 15:11:05,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 15:11:05,795 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 15:11:05,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (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 [2018-11-07 15:11:05,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-07 15:11:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 15:11:05,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 15:11:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-11-07 15:11:05,867 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-11-07 15:11:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-11-07 15:11:05,868 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-11-07 15:11:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 15:11:05,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 15:11:05,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 15:11:05,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 15:11:12,397 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 15:11:12,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:11:12 BoogieIcfgContainer [2018-11-07 15:11:12,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 15:11:12,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 15:11:12,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 15:11:12,407 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 15:11:12,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:11:03" (1/3) ... [2018-11-07 15:11:12,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7b92a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:11:12, skipping insertion in model container [2018-11-07 15:11:12,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:11:05" (2/3) ... [2018-11-07 15:11:12,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7b92a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:11:12, skipping insertion in model container [2018-11-07 15:11:12,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:11:12" (3/3) ... [2018-11-07 15:11:12,411 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label28_true-unreach-call.c [2018-11-07 15:11:12,422 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 15:11:12,433 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 15:11:12,452 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 15:11:12,496 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 15:11:12,496 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 15:11:12,496 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 15:11:12,496 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 15:11:12,497 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 15:11:12,497 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 15:11:12,497 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 15:11:12,497 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 15:11:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-11-07 15:11:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-07 15:11:12,556 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:12,559 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:12,562 INFO L423 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:12,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:12,570 INFO L82 PathProgramCache]: Analyzing trace with hash 339561401, now seen corresponding path program 1 times [2018-11-07 15:11:12,573 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:12,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:12,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:12,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:12,638 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:13,071 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:11:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:13,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:13,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 15:11:13,182 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:13,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 15:11:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 15:11:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:11:13,210 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 3 states. [2018-11-07 15:11:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:16,798 INFO L93 Difference]: Finished difference Result 1194 states and 2152 transitions. [2018-11-07 15:11:16,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 15:11:16,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2018-11-07 15:11:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:16,824 INFO L225 Difference]: With dead ends: 1194 [2018-11-07 15:11:16,825 INFO L226 Difference]: Without dead ends: 754 [2018-11-07 15:11:16,834 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 15:11:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2018-11-07 15:11:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 752. [2018-11-07 15:11:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2018-11-07 15:11:16,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1325 transitions. [2018-11-07 15:11:16,956 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1325 transitions. Word has length 39 [2018-11-07 15:11:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:16,957 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 1325 transitions. [2018-11-07 15:11:16,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 15:11:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1325 transitions. [2018-11-07 15:11:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-07 15:11:16,966 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:16,966 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:16,967 INFO L423 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:16,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1690148053, now seen corresponding path program 1 times [2018-11-07 15:11:16,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:16,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:16,969 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:17,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:17,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:11:17,297 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:17,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:11:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:11:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:11:17,300 INFO L87 Difference]: Start difference. First operand 752 states and 1325 transitions. Second operand 6 states. [2018-11-07 15:11:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:27,024 INFO L93 Difference]: Finished difference Result 2839 states and 5159 transitions. [2018-11-07 15:11:27,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:11:27,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2018-11-07 15:11:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:27,044 INFO L225 Difference]: With dead ends: 2839 [2018-11-07 15:11:27,044 INFO L226 Difference]: Without dead ends: 2093 [2018-11-07 15:11:27,053 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2018-11-07 15:11:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2052. [2018-11-07 15:11:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2052 states. [2018-11-07 15:11:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 3398 transitions. [2018-11-07 15:11:27,156 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 3398 transitions. Word has length 113 [2018-11-07 15:11:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:27,157 INFO L480 AbstractCegarLoop]: Abstraction has 2052 states and 3398 transitions. [2018-11-07 15:11:27,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:11:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 3398 transitions. [2018-11-07 15:11:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-07 15:11:27,162 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:27,162 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:27,163 INFO L423 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:27,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash 55667084, now seen corresponding path program 1 times [2018-11-07 15:11:27,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:27,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:27,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:27,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:27,165 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:27,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:27,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:11:27,443 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:27,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:11:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:11:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:11:27,444 INFO L87 Difference]: Start difference. First operand 2052 states and 3398 transitions. Second operand 5 states. [2018-11-07 15:11:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:31,868 INFO L93 Difference]: Finished difference Result 6119 states and 10292 transitions. [2018-11-07 15:11:31,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:11:31,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2018-11-07 15:11:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:31,904 INFO L225 Difference]: With dead ends: 6119 [2018-11-07 15:11:31,905 INFO L226 Difference]: Without dead ends: 4073 [2018-11-07 15:11:31,915 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4073 states. [2018-11-07 15:11:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4073 to 3992. [2018-11-07 15:11:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3992 states. [2018-11-07 15:11:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 5866 transitions. [2018-11-07 15:11:32,039 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 5866 transitions. Word has length 116 [2018-11-07 15:11:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:32,039 INFO L480 AbstractCegarLoop]: Abstraction has 3992 states and 5866 transitions. [2018-11-07 15:11:32,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:11:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 5866 transitions. [2018-11-07 15:11:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-07 15:11:32,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:32,043 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:32,043 INFO L423 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:32,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:32,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1327529950, now seen corresponding path program 1 times [2018-11-07 15:11:32,044 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:32,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:32,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:32,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:32,045 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:32,330 WARN L179 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2018-11-07 15:11:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:32,651 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:32,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-07 15:11:32,652 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:32,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 15:11:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 15:11:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-11-07 15:11:32,653 INFO L87 Difference]: Start difference. First operand 3992 states and 5866 transitions. Second operand 6 states. [2018-11-07 15:11:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:37,233 INFO L93 Difference]: Finished difference Result 11063 states and 16902 transitions. [2018-11-07 15:11:37,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-07 15:11:37,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2018-11-07 15:11:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:37,278 INFO L225 Difference]: With dead ends: 11063 [2018-11-07 15:11:37,278 INFO L226 Difference]: Without dead ends: 7077 [2018-11-07 15:11:37,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-11-07 15:11:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7077 states. [2018-11-07 15:11:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7077 to 6975. [2018-11-07 15:11:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6975 states. [2018-11-07 15:11:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6975 states to 6975 states and 9521 transitions. [2018-11-07 15:11:37,526 INFO L78 Accepts]: Start accepts. Automaton has 6975 states and 9521 transitions. Word has length 126 [2018-11-07 15:11:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:37,527 INFO L480 AbstractCegarLoop]: Abstraction has 6975 states and 9521 transitions. [2018-11-07 15:11:37,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 15:11:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6975 states and 9521 transitions. [2018-11-07 15:11:37,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-11-07 15:11:37,531 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:37,531 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:37,532 INFO L423 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:37,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1824244347, now seen corresponding path program 1 times [2018-11-07 15:11:37,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:37,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:37,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:37,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:37,534 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:37,905 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 15:11:37,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 15:11:37,905 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:37,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 15:11:37,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 15:11:37,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 15:11:37,907 INFO L87 Difference]: Start difference. First operand 6975 states and 9521 transitions. Second operand 5 states. [2018-11-07 15:11:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 15:11:45,242 INFO L93 Difference]: Finished difference Result 18643 states and 26318 transitions. [2018-11-07 15:11:45,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-07 15:11:45,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 136 [2018-11-07 15:11:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 15:11:45,316 INFO L225 Difference]: With dead ends: 18643 [2018-11-07 15:11:45,317 INFO L226 Difference]: Without dead ends: 11674 [2018-11-07 15:11:45,360 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2018-11-07 15:11:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11528. [2018-11-07 15:11:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11528 states. [2018-11-07 15:11:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11528 states to 11528 states and 15522 transitions. [2018-11-07 15:11:45,662 INFO L78 Accepts]: Start accepts. Automaton has 11528 states and 15522 transitions. Word has length 136 [2018-11-07 15:11:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 15:11:45,663 INFO L480 AbstractCegarLoop]: Abstraction has 11528 states and 15522 transitions. [2018-11-07 15:11:45,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 15:11:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11528 states and 15522 transitions. [2018-11-07 15:11:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-11-07 15:11:45,668 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 15:11:45,668 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 15:11:45,668 INFO L423 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 15:11:45,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 298084566, now seen corresponding path program 1 times [2018-11-07 15:11:45,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 15:11:45,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:45,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 15:11:45,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 15:11:45,670 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 15:11:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 15:11:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 15:11:46,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 15:11:46,202 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 15:11:46,203 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 152 with the following transitions: [2018-11-07 15:11:46,205 INFO L202 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [285], [287], [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], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [762], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-11-07 15:11:46,253 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 15:11:46,253 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 15:11:46,793 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-07 15:11:46,795 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-11-07 15:11:46,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 15:11:46,838 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-07 15:11:47,228 INFO L227 lantSequenceWeakener]: Weakened 145 states. On average, predicates are now at 77.87% of their original sizes. [2018-11-07 15:11:47,228 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-07 15:11:47,549 INFO L415 sIntCurrentIteration]: We unified 150 AI predicates to 150 [2018-11-07 15:11:47,549 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-07 15:11:47,550 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-07 15:11:47,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2018-11-07 15:11:47,551 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 15:11:47,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-07 15:11:47,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-07 15:11:47,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-07 15:11:47,552 INFO L87 Difference]: Start difference. First operand 11528 states and 15522 transitions. Second operand 8 states. [2018-11-07 15:11:50,301 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown