java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 08:10:16,102 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 08:10:16,104 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 08:10:16,116 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 08:10:16,116 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 08:10:16,118 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 08:10:16,119 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 08:10:16,121 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 08:10:16,123 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 08:10:16,124 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 08:10:16,125 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 08:10:16,125 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 08:10:16,126 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 08:10:16,135 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 08:10:16,136 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 08:10:16,137 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 08:10:16,141 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 08:10:16,142 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 08:10:16,146 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 08:10:16,149 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 08:10:16,150 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 08:10:16,156 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 08:10:16,158 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 08:10:16,158 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 08:10:16,159 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 08:10:16,161 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 08:10:16,162 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 08:10:16,164 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 08:10:16,166 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 08:10:16,168 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 08:10:16,171 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 08:10:16,172 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-27 08:10:16,172 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-27 08:10:16,172 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-27 08:10:16,175 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-27 08:10:16,176 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-27 08:10:16,177 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-27 08:10:16,206 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 08:10:16,206 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 08:10:16,207 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 08:10:16,207 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 08:10:16,207 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 08:10:16,208 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 08:10:16,209 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-27 08:10:16,209 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 08:10:16,209 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 08:10:16,209 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 08:10:16,209 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 08:10:16,210 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 08:10:16,210 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 08:10:16,210 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-27 08:10:16,211 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 08:10:16,211 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 08:10:16,211 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 08:10:16,211 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 08:10:16,213 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 08:10:16,214 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 08:10:16,214 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 08:10:16,214 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 08:10:16,214 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 08:10:16,214 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 08:10:16,215 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 08:10:16,215 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 08:10:16,215 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 08:10:16,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 08:10:16,216 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 08:10:16,217 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 08:10:16,217 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 08:10:16,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 08:10:16,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 08:10:16,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 08:10:16,287 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 08:10:16,288 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 08:10:16,289 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label11_true-unreach-call.c [2018-10-27 08:10:16,361 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb438d036/5f35b9f741ca4eff92d3c3b85556b917/FLAGbd6278686 [2018-10-27 08:10:17,082 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 08:10:17,083 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label11_true-unreach-call.c [2018-10-27 08:10:17,104 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb438d036/5f35b9f741ca4eff92d3c3b85556b917/FLAGbd6278686 [2018-10-27 08:10:17,121 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/bb438d036/5f35b9f741ca4eff92d3c3b85556b917 [2018-10-27 08:10:17,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 08:10:17,132 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 08:10:17,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 08:10:17,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 08:10:17,137 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 08:10:17,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:17" (1/1) ... [2018-10-27 08:10:17,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403d6da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:17, skipping insertion in model container [2018-10-27 08:10:17,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:10:17" (1/1) ... [2018-10-27 08:10:17,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 08:10:17,251 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 08:10:17,970 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:10:17,976 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 08:10:18,273 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 08:10:18,294 INFO L193 MainTranslator]: Completed translation [2018-10-27 08:10:18,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18 WrapperNode [2018-10-27 08:10:18,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 08:10:18,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 08:10:18,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 08:10:18,296 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 08:10:18,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 08:10:18,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 08:10:18,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 08:10:18,690 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 08:10:18,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... [2018-10-27 08:10:18,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 08:10:18,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 08:10:18,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 08:10:18,912 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 08:10:18,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:10:18,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 08:10:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 08:10:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2018-10-27 08:10:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2018-10-27 08:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2018-10-27 08:10:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2018-10-27 08:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 08:10:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 08:10:18,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 08:10:18,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 08:10:27,644 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 08:10:27,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:27 BoogieIcfgContainer [2018-10-27 08:10:27,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 08:10:27,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 08:10:27,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 08:10:27,650 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 08:10:27,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:10:17" (1/3) ... [2018-10-27 08:10:27,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf3241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:27, skipping insertion in model container [2018-10-27 08:10:27,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:10:18" (2/3) ... [2018-10-27 08:10:27,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf3241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:10:27, skipping insertion in model container [2018-10-27 08:10:27,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:10:27" (3/3) ... [2018-10-27 08:10:27,654 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label11_true-unreach-call.c [2018-10-27 08:10:27,664 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 08:10:27,673 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 08:10:27,691 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 08:10:27,733 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 08:10:27,734 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 08:10:27,734 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 08:10:27,734 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 08:10:27,734 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 08:10:27,734 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 08:10:27,734 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 08:10:27,735 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 08:10:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states. [2018-10-27 08:10:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-27 08:10:27,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:27,780 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:27,783 INFO L424 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:27,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash -383317628, now seen corresponding path program 1 times [2018-10-27 08:10:27,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:27,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:27,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:27,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:27,840 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:10:28,343 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:10:28,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:10:28,344 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:10:28,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:10:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:10:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:10:28,371 INFO L87 Difference]: Start difference. First operand 438 states. Second operand 4 states. [2018-10-27 08:10:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:35,530 INFO L93 Difference]: Finished difference Result 1558 states and 2849 transitions. [2018-10-27 08:10:35,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:10:35,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2018-10-27 08:10:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:35,563 INFO L225 Difference]: With dead ends: 1558 [2018-10-27 08:10:35,563 INFO L226 Difference]: Without dead ends: 1114 [2018-10-27 08:10:35,577 INFO L605 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 [2018-10-27 08:10:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2018-10-27 08:10:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 759. [2018-10-27 08:10:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 759 states. [2018-10-27 08:10:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1355 transitions. [2018-10-27 08:10:35,696 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1355 transitions. Word has length 62 [2018-10-27 08:10:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:35,697 INFO L481 AbstractCegarLoop]: Abstraction has 759 states and 1355 transitions. [2018-10-27 08:10:35,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:10:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1355 transitions. [2018-10-27 08:10:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-27 08:10:35,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:35,705 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:35,706 INFO L424 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:35,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -679699185, now seen corresponding path program 1 times [2018-10-27 08:10:35,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:35,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:35,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:35,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:35,708 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:10:35,972 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:10:35,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-27 08:10:35,972 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:10:35,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-27 08:10:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-27 08:10:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:10:35,975 INFO L87 Difference]: Start difference. First operand 759 states and 1355 transitions. Second operand 4 states. [2018-10-27 08:10:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:42,163 INFO L93 Difference]: Finished difference Result 2755 states and 5131 transitions. [2018-10-27 08:10:42,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-27 08:10:42,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2018-10-27 08:10:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:42,180 INFO L225 Difference]: With dead ends: 2755 [2018-10-27 08:10:42,181 INFO L226 Difference]: Without dead ends: 2002 [2018-10-27 08:10:42,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-27 08:10:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2018-10-27 08:10:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1999. [2018-10-27 08:10:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1999 states. [2018-10-27 08:10:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3228 transitions. [2018-10-27 08:10:42,295 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3228 transitions. Word has length 132 [2018-10-27 08:10:42,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:42,296 INFO L481 AbstractCegarLoop]: Abstraction has 1999 states and 3228 transitions. [2018-10-27 08:10:42,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-27 08:10:42,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3228 transitions. [2018-10-27 08:10:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-27 08:10:42,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:42,312 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:42,312 INFO L424 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:42,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1833978789, now seen corresponding path program 1 times [2018-10-27 08:10:42,313 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:42,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:42,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:42,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:42,315 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 08:10:42,706 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 08:10:42,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-27 08:10:42,707 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:10:42,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-27 08:10:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-27 08:10:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-27 08:10:42,708 INFO L87 Difference]: Start difference. First operand 1999 states and 3228 transitions. Second operand 5 states. [2018-10-27 08:10:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:10:50,571 INFO L93 Difference]: Finished difference Result 5997 states and 9873 transitions. [2018-10-27 08:10:50,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 08:10:50,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2018-10-27 08:10:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:10:50,601 INFO L225 Difference]: With dead ends: 5997 [2018-10-27 08:10:50,601 INFO L226 Difference]: Without dead ends: 4004 [2018-10-27 08:10:50,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-27 08:10:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2018-10-27 08:10:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 3960. [2018-10-27 08:10:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3960 states. [2018-10-27 08:10:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5739 transitions. [2018-10-27 08:10:50,766 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5739 transitions. Word has length 179 [2018-10-27 08:10:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:10:50,767 INFO L481 AbstractCegarLoop]: Abstraction has 3960 states and 5739 transitions. [2018-10-27 08:10:50,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-27 08:10:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5739 transitions. [2018-10-27 08:10:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2018-10-27 08:10:50,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:10:50,788 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:10:50,789 INFO L424 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:10:50,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2147437264, now seen corresponding path program 1 times [2018-10-27 08:10:50,789 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:10:50,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:50,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:10:50,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:10:50,791 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:10:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:10:52,057 WARN L179 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2018-10-27 08:10:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 324 proven. 78 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-27 08:10:52,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:10:52,556 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:10:52,557 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 444 with the following transitions: [2018-10-27 08:10:52,559 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], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:10:52,624 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:10:52,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:10:53,716 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-27 08:10:53,718 INFO L272 AbstractInterpreter]: Visited 207 different actions 207 times. Never merged. Never widened. Never found a fixpoint. Largest state had 24 variables. [2018-10-27 08:10:53,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:10:53,750 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-27 08:10:54,991 INFO L227 lantSequenceWeakener]: Weakened 431 states. On average, predicates are now at 77.78% of their original sizes. [2018-10-27 08:10:54,992 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-10-27 08:10:55,239 INFO L415 sIntCurrentIteration]: We unified 442 AI predicates to 442 [2018-10-27 08:10:55,239 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-27 08:10:55,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-27 08:10:55,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2018-10-27 08:10:55,242 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 08:10:55,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-27 08:10:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-27 08:10:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-27 08:10:55,244 INFO L87 Difference]: Start difference. First operand 3960 states and 5739 transitions. Second operand 6 states. [2018-10-27 08:11:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:11:23,858 INFO L93 Difference]: Finished difference Result 8224 states and 11810 transitions. [2018-10-27 08:11:23,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-27 08:11:23,859 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 443 [2018-10-27 08:11:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:11:23,881 INFO L225 Difference]: With dead ends: 8224 [2018-10-27 08:11:23,882 INFO L226 Difference]: Without dead ends: 4270 [2018-10-27 08:11:23,898 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 443 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-27 08:11:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2018-10-27 08:11:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4268. [2018-10-27 08:11:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4268 states. [2018-10-27 08:11:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 6056 transitions. [2018-10-27 08:11:24,025 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 6056 transitions. Word has length 443 [2018-10-27 08:11:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:11:24,026 INFO L481 AbstractCegarLoop]: Abstraction has 4268 states and 6056 transitions. [2018-10-27 08:11:24,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-27 08:11:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 6056 transitions. [2018-10-27 08:11:24,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-10-27 08:11:24,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:11:24,048 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:11:24,048 INFO L424 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:11:24,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1235760953, now seen corresponding path program 1 times [2018-10-27 08:11:24,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:11:24,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:24,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:24,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:24,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:11:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:24,779 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 13 [2018-10-27 08:11:25,018 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2018-10-27 08:11:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 249 proven. 80 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-27 08:11:25,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:11:25,277 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:11:25,278 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 518 with the following transitions: [2018-10-27 08:11:25,279 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], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:11:25,290 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:11:25,290 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:11:26,003 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:11:26,003 INFO L272 AbstractInterpreter]: Visited 285 different actions 1133 times. Merged at 8 different actions 28 times. Never widened. Found 6 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:11:26,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:26,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:11:26,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:11:26,013 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:11:26,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:26,024 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:11:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:26,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:11:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-10-27 08:11:26,814 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:11:27,736 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-27 08:11:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 249 proven. 80 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-27 08:11:28,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:11:28,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2018-10-27 08:11:28,174 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:11:28,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 08:11:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 08:11:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-10-27 08:11:28,177 INFO L87 Difference]: Start difference. First operand 4268 states and 6056 transitions. Second operand 12 states. [2018-10-27 08:11:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:11:45,579 INFO L93 Difference]: Finished difference Result 14855 states and 23978 transitions. [2018-10-27 08:11:45,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-27 08:11:45,579 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 517 [2018-10-27 08:11:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:11:45,656 INFO L225 Difference]: With dead ends: 14855 [2018-10-27 08:11:45,656 INFO L226 Difference]: Without dead ends: 10901 [2018-10-27 08:11:45,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 1065 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=606, Invalid=1844, Unknown=0, NotChecked=0, Total=2450 [2018-10-27 08:11:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10901 states. [2018-10-27 08:11:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 10599. [2018-10-27 08:11:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10599 states. [2018-10-27 08:11:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10599 states to 10599 states and 14156 transitions. [2018-10-27 08:11:46,099 INFO L78 Accepts]: Start accepts. Automaton has 10599 states and 14156 transitions. Word has length 517 [2018-10-27 08:11:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:11:46,100 INFO L481 AbstractCegarLoop]: Abstraction has 10599 states and 14156 transitions. [2018-10-27 08:11:46,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-27 08:11:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10599 states and 14156 transitions. [2018-10-27 08:11:46,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2018-10-27 08:11:46,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:11:46,133 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:11:46,133 INFO L424 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:11:46,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1779225895, now seen corresponding path program 1 times [2018-10-27 08:11:46,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:11:46,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:46,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:46,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:11:46,135 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:11:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:47,755 WARN L179 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2018-10-27 08:11:48,114 WARN L179 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2018-10-27 08:11:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 559 proven. 78 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-27 08:11:48,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:11:48,603 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:11:48,603 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 540 with the following transitions: [2018-10-27 08:11:48,604 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], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [691], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1209], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:11:48,611 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:11:48,611 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:11:49,902 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:11:49,903 INFO L272 AbstractInterpreter]: Visited 212 different actions 1047 times. Merged at 9 different actions 34 times. Never widened. Found 8 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:11:49,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:11:49,908 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:11:49,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:11:49,908 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:11:49,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:11:49,920 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:11:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:11:50,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:11:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 520 proven. 41 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2018-10-27 08:11:50,885 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:11:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 235 proven. 428 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-27 08:11:51,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:11:51,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2018-10-27 08:11:51,773 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:11:51,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-27 08:11:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-27 08:11:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2018-10-27 08:11:51,775 INFO L87 Difference]: Start difference. First operand 10599 states and 14156 transitions. Second operand 17 states. [2018-10-27 08:11:59,168 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2018-10-27 08:12:05,675 WARN L179 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2018-10-27 08:12:25,562 WARN L179 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2018-10-27 08:12:28,437 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-10-27 08:12:31,645 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-10-27 08:12:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 08:12:35,536 INFO L93 Difference]: Finished difference Result 43949 states and 63861 transitions. [2018-10-27 08:12:35,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-10-27 08:12:35,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 539 [2018-10-27 08:12:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 08:12:35,711 INFO L225 Difference]: With dead ends: 43949 [2018-10-27 08:12:35,711 INFO L226 Difference]: Without dead ends: 31985 [2018-10-27 08:12:35,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1165 SyntacticMatches, 8 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7880 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3280, Invalid=16742, Unknown=0, NotChecked=0, Total=20022 [2018-10-27 08:12:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31985 states. [2018-10-27 08:12:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31985 to 28937. [2018-10-27 08:12:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28937 states. [2018-10-27 08:12:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28937 states to 28937 states and 37309 transitions. [2018-10-27 08:12:36,677 INFO L78 Accepts]: Start accepts. Automaton has 28937 states and 37309 transitions. Word has length 539 [2018-10-27 08:12:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 08:12:36,678 INFO L481 AbstractCegarLoop]: Abstraction has 28937 states and 37309 transitions. [2018-10-27 08:12:36,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-27 08:12:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 28937 states and 37309 transitions. [2018-10-27 08:12:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-10-27 08:12:36,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 08:12:36,775 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 08:12:36,775 INFO L424 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 08:12:36,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:36,776 INFO L82 PathProgramCache]: Analyzing trace with hash -671146423, now seen corresponding path program 1 times [2018-10-27 08:12:36,776 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 08:12:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:36,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 08:12:36,777 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 08:12:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 223 proven. 267 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2018-10-27 08:12:38,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:12:38,514 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 08:12:38,515 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 712 with the following transitions: [2018-10-27 08:12:38,515 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], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [469], [471], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [684], [688], [692], [696], [707], [710], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [755], [759], [763], [767], [771], [775], [779], [783], [787], [798], [809], [813], [824], [835], [839], [850], [854], [865], [869], [873], [877], [881], [885], [896], [900], [904], [908], [912], [916], [920], [924], [935], [939], [943], [947], [951], [955], [959], [963], [967], [971], [975], [979], [983], [987], [991], [1002], [1006], [1010], [1014], [1018], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1072], [1076], [1080], [1084], [1088], [1092], [1096], [1100], [1104], [1108], [1112], [1116], [1120], [1124], [1128], [1132], [1136], [1140], [1144], [1148], [1152], [1156], [1160], [1164], [1167], [1168], [1172], [1176], [1180], [1191], [1202], [1206], [1210], [1214], [1218], [1229], [1233], [1237], [1241], [1245], [1256], [1260], [1264], [1268], [1272], [1276], [1280], [1284], [1288], [1292], [1296], [1300], [1304], [1308], [1312], [1316], [1320], [1324], [1328], [1332], [1336], [1340], [1344], [1348], [1352], [1356], [1367], [1371], [1375], [1379], [1383], [1394], [1398], [1402], [1406], [1417], [1421], [1425], [1429], [1433], [1437], [1441], [1452], [1456], [1460], [1471], [1475], [1486], [1490], [1494], [1498], [1502], [1506], [1510], [1514], [1518], [1522], [1526], [1530], [1534], [1538], [1542], [1546], [1550], [1554], [1558], [1561], [1635], [1639], [1643], [1649], [1653], [1655], [1662], [1663], [1664], [1666], [1667] [2018-10-27 08:12:38,521 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-27 08:12:38,521 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 08:12:39,244 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 08:12:39,244 INFO L272 AbstractInterpreter]: Visited 286 different actions 1143 times. Merged at 9 different actions 34 times. Never widened. Found 9 fixpoints after 2 different actions. Largest state had 24 variables. [2018-10-27 08:12:39,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 08:12:39,268 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 08:12:39,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 08:12:39,268 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-27 08:12:39,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 08:12:39,280 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 08:12:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 08:12:39,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 08:12:43,714 WARN L179 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 37 [2018-10-27 08:12:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 237 proven. 10 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2018-10-27 08:12:44,848 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 08:12:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 503 proven. 2 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-27 08:12:45,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 08:12:45,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 14 [2018-10-27 08:12:45,810 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 08:12:45,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-27 08:12:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-27 08:12:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=131, Unknown=1, NotChecked=0, Total=182 [2018-10-27 08:12:45,812 INFO L87 Difference]: Start difference. First operand 28937 states and 37309 transitions. Second operand 12 states. Received shutdown request... [2018-10-27 08:14:13,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-27 08:14:13,417 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-27 08:14:13,425 WARN L205 ceAbstractionStarter]: Timeout [2018-10-27 08:14:13,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:14:13 BoogieIcfgContainer [2018-10-27 08:14:13,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 08:14:13,426 INFO L168 Benchmark]: Toolchain (without parser) took 236294.58 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -572.6 MB). Peak memory consumption was 2.0 GB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,427 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 08:14:13,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1162.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 392.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -880.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,429 INFO L168 Benchmark]: Boogie Preprocessor took 221.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,430 INFO L168 Benchmark]: RCFGBuilder took 8733.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 314.7 MB). Peak memory consumption was 314.7 MB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,431 INFO L168 Benchmark]: TraceAbstraction took 225779.21 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -140.5 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-27 08:14:13,435 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1162.51 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 392.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 765.5 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -880.2 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 221.87 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8733.42 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 314.7 MB). Peak memory consumption was 314.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225779.21 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: -140.5 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 172). Cancelled while BasicCegarLoop was constructing difference of abstraction (28937states) and FLOYD_HOARE automaton (currently 18 states, 12 states before enhancement),while ReachableStatesComputation was computing reachable states (13127 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 438 locations, 1 error locations. TIMEOUT Result, 225.7s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 199.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1536 SDtfs, 25316 SDslu, 2789 SDs, 0 SdLazy, 32342 SolverSat, 8772 SolverUnsat, 39 SolverUnknown, 0 SolverNotchecked, 166.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 4340 GetRequests, 4098 SyntacticMatches, 15 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8678 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28937occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 3.9s AbstIntTime, 4 AbstIntIterations, 1 AbstIntStrong, 0.9983051262463029 AbsIntWeakeningRatio, 0.07239819004524888 AbsIntAvgWeakeningVarsNumRemoved, 16.604072398190045 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 6 MinimizatonAttempts, 3754 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 4350 NumberOfCodeBlocks, 4350 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 6104 ConstructedInterpolants, 7 QuantifiedInterpolants, 15185360 SizeOfPredicates, 10 NumberOfNonLiveVariables, 2497 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 5575/6641 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown